CVE-2026-45972

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF and double free in smb2_open_file() Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL, otherwise a double free.

Root has patched CVE-2026-45972 in the linux package for Root:Ubuntu:24.04. Multiple fixed versions available.

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF and double free in smb2_open_file() Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL, otherwise a double free.

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

• ARM64 architecture;
• MIPS architecture;
• PowerPC architecture;
• x86 architecture;
• Block layer subsystem;
• Cryptographic API;
• ACPI drivers;
• ATM drivers;
• RNBD block device driver;
• Ublk userspace block driver;
• Bus devices;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• Clocksource drivers;
• CPU idle management framework;
• Hardware crypto device drivers;
• DMA engine subsystem;
• EFI core;
• GPIO subsystem;
• GPU drivers;
• HID subsystem;
• Hardware monitoring drivers;
• IIO subsystem;
• InfiniBand drivers;
• IOMMU subsystem;
• Multiple devices driver;
• Media drivers;
• Multifunction device drivers;
• Broadcom VK accelerator driver;
• MOST (Media Oriented Systems Transport) drivers;
• MTD block device drivers;
• Ethernet bonding driver;
• Network drivers;
• Mellanox network drivers;
• STMicroelectronics network drivers;
• NTB driver;
• NVME drivers;
• PCI subsystem;
• Performance monitor drivers;
• Pin controllers subsystem;
• x86 platform drivers;
• Power supply drivers;
• RapidIO drivers;
• RAS (Reliability, Availability, Serviceability) subsystem;
• Remote Processor subsystem;
• RPMSG subsystem;
• S/390 drivers;
• SCSI subsystem;
• MediaTek SoC drivers;
• Texas Instruments SoC drivers;
• SPI subsystem;
• Greybus lights staging drivers;
• Realtek RTL8723BS SDIO drivers;
• UFS subsystem;
• ChipIdea USB driver;
• DesignWare USB3 driver;
• USB over IP driver;
• vDPA drivers;
• Virtio Host (VHOST) subsystem;
• Framebuffer layer;
• BTRFS file system;
• File systems infrastructure;
• Ceph distributed file system;
• Ext4 file system;
• F2FS file system;
• FAT file system;
• GFS2 file system;
• HFS+ file system;
• JFS file system;
• Network file system (NFS) server daemon;
• NILFS2 file system;
• NTFS3 file system;
• OCFS2 file system;
• Proc file system;
• Pstore file system;
• Diskquota system;
• SMB network file system;
• XFS file system;
• Audit subsystem;
• Memory Management;
• IPv6 networking;
• Netfilter;
• Tracing infrastructure;
• Kernel kexec() syscall;
• RCU subsystem;
• Scheduler infrastructure;
• Scatterlist API;
• 9P file system network protocol;
• Asynchronous Transfer Mode (ATM) subsystem;
• B.A.T.M.A.N. meshing protocol;
• Bluetooth subsystem;
• Ethernet bridge;
• Ceph Core library;
• Networking core;
• IPv4 networking;
• KCM (Kernel Connection Multiplexor) sockets driver;
• Multipath TCP;
• NFC subsystem;
• RDS protocol;
• RxRPC session sockets;
• Network traffic control;
• SMC sockets;
• Sun RPC protocol;
• X.25 network layer;
• XFRM subsystem;
• AppArmor security module;
• Simplified Mandatory Access Control Kernel framework;
• SOF drivers;
• USB sound devices; (CVE-2025-40005, CVE-2025-71229, CVE-2025-71231, CVE-2025-71232, CVE-2025-71233, CVE-2025-71235, CVE-2025-71236, CVE-2025-71237, CVE-2025-71238, CVE-2025-71239, CVE-2025-71265, CVE-2025-71266, CVE-2025-71267, CVE-2025-71272, CVE-2025-71273, CVE-2025-71274, CVE-2025-71286, CVE-2025-71291, CVE-2025-71292, CVE-2025-71294, CVE-2025-71295, CVE-2025-71297, CVE-2025-71304, CVE-2025-71305, CVE-2026-23100, CVE-2026-23169, CVE-2026-23220, CVE-2026-23221, CVE-2026-23222, CVE-2026-23228, CVE-2026-23229, CVE-2026-23230, CVE-2026-23233, CVE-2026-23234, CVE-2026-23235, CVE-2026-23236, CVE-2026-23237, CVE-2026-23238, CVE-2026-23241, CVE-2026-23242, CVE-2026-23243, CVE-2026-23249, CVE-2026-23266, CVE-2026-23267, CVE-2026-23272, CVE-2026-23278, CVE-2026-23392, CVE-2026-23428, CVE-2026-23450, CVE-2026-23455, CVE-2026-31402, CVE-2026-31411, CVE-2026-31418, CVE-2026-31436, CVE-2026-31448, CVE-2026-31478, CVE-2026-31607,…

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

• ARM64 architecture;
• MIPS architecture;
• PowerPC architecture;
• x86 architecture;
• Block layer subsystem;
• Cryptographic API;
• ACPI drivers;
• ATM drivers;
• RNBD block device driver;
• Ublk userspace block driver;
• Bus devices;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• Clocksource drivers;
• CPU idle management framework;
• Hardware crypto device drivers;
• DMA engine subsystem;
• EFI core;
• GPIO subsystem;
• GPU drivers;
• HID subsystem;
• Hardware monitoring drivers;
• IIO subsystem;
• InfiniBand drivers;
• IOMMU subsystem;
• Multiple devices driver;
• Media drivers;
• Multifunction device drivers;
• Broadcom VK accelerator driver;
• MOST (Media Oriented Systems Transport) drivers;
• MTD block device drivers;
• Ethernet bonding driver;
• Network drivers;
• Mellanox network drivers;
• STMicroelectronics network drivers;
• NTB driver;
• NVME drivers;
• PCI subsystem;
• Performance monitor drivers;
• Pin controllers subsystem;
• x86 platform drivers;
• Power supply drivers;
• RapidIO drivers;
• RAS (Reliability, Availability, Serviceability) subsystem;
• Remote Processor subsystem;
• RPMSG subsystem;
• S/390 drivers;
• SCSI subsystem;
• MediaTek SoC drivers;
• Texas Instruments SoC drivers;
• SPI subsystem;
• Greybus lights staging drivers;
• Realtek RTL8723BS SDIO drivers;
• UFS subsystem;
• ChipIdea USB driver;
• DesignWare USB3 driver;
• USB over IP driver;
• vDPA drivers;
• Virtio Host (VHOST) subsystem;
• Framebuffer layer;
• BTRFS file system;
• File systems infrastructure;
• Ceph distributed file system;
• Ext4 file system;
• F2FS file system;
• FAT file system;
• GFS2 file system;
• HFS+ file system;
• JFS file system;
• Network file system (NFS) server daemon;
• NILFS2 file system;
• NTFS3 file system;
• OCFS2 file system;
• Proc file system;
• Pstore file system;
• Diskquota system;
• SMB network file system;
• XFS file system;
• Audit subsystem;
• Memory Management;
• IPv6 networking;
• Netfilter;
• Tracing infrastructure;
• Kernel kexec() syscall;
• RCU subsystem;
• Scheduler infrastructure;
• Scatterlist API;
• 9P file system network protocol;
• Asynchronous Transfer Mode (ATM) subsystem;
• B.A.T.M.A.N. meshing protocol;
• Bluetooth subsystem;
• Ethernet bridge;
• Ceph Core library;
• Networking core;
• IPv4 networking;
• KCM (Kernel Connection Multiplexor) sockets driver;
• Multipath TCP;
• NFC subsystem;
• RDS protocol;
• RxRPC session sockets;
• Network traffic control;
• SMC sockets;
• Sun RPC protocol;
• X.25 network layer;
• XFRM subsystem;
• AppArmor security module;
• Simplified Mandatory Access Control Kernel framework;
• SOF drivers;
• USB sound devices; (CVE-2025-40005, CVE-2025-71229, CVE-2025-71231, CVE-2025-71232, CVE-2025-71233, CVE-2025-71235, CVE-2025-71236, CVE-2025-71237, CVE-2025-71238, CVE-2025-71239, CVE-2025-71265, CVE-2025-71266, CVE-2025-71267, CVE-2025-71272, CVE-2025-71273, CVE-2025-71274, CVE-2025-71286, CVE-2025-71291, CVE-2025-71292, CVE-2025-71294, CVE-2025-71295, CVE-2025-71297, CVE-2025-71304, CVE-2025-71305, CVE-2026-23100, CVE-2026-23169, CVE-2026-23220, CVE-2026-23221, CVE-2026-23222, CVE-2026-23228, CVE-2026-23229, CVE-2026-23230, CVE-2026-23233, CVE-2026-23234, CVE-2026-23235, CVE-2026-23236, CVE-2026-23237, CVE-2026-23238, CVE-2026-23241, CVE-2026-23242, CVE-2026-23243, CVE-2026-23249, CVE-2026-23266, CVE-2026-23267, CVE-2026-23272, CVE-2026-23278, CVE-2026-23392, CVE-2026-23428, CVE-2026-23450, CVE-2026-23455, CVE-2026-31402, CVE-2026-31411, CVE-2026-31418, CVE-2026-31436, CVE-2026-31448, CVE-2026-31478, CVE-2026-31607,…

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

• ARM64 architecture;
• MIPS architecture;
• PowerPC architecture;
• x86 architecture;
• Block layer subsystem;
• Cryptographic API;
• ACPI drivers;
• ATM drivers;
• RNBD block device driver;
• Ublk userspace block driver;
• Bus devices;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• Clocksource drivers;
• CPU idle management framework;
• Hardware crypto device drivers;
• DMA engine subsystem;
• EFI core;
• GPIO subsystem;
• GPU drivers;
• HID subsystem;
• Hardware monitoring drivers;
• IIO subsystem;
• InfiniBand drivers;
• IOMMU subsystem;
• Multiple devices driver;
• Media drivers;
• Multifunction device drivers;
• Broadcom VK accelerator driver;
• MOST (Media Oriented Systems Transport) drivers;
• MTD block device drivers;
• Ethernet bonding driver;
• Network drivers;
• Mellanox network drivers;
• STMicroelectronics network drivers;
• NTB driver;
• NVME drivers;
• PCI subsystem;
• Performance monitor drivers;
• Pin controllers subsystem;
• x86 platform drivers;
• Power supply drivers;
• RapidIO drivers;
• RAS (Reliability, Availability, Serviceability) subsystem;
• Remote Processor subsystem;
• RPMSG subsystem;
• S/390 drivers;
• SCSI subsystem;
• MediaTek SoC drivers;
• Texas Instruments SoC drivers;
• SPI subsystem;
• Greybus lights staging drivers;
• Realtek RTL8723BS SDIO drivers;
• UFS subsystem;
• ChipIdea USB driver;
• DesignWare USB3 driver;
• USB over IP driver;
• vDPA drivers;
• Virtio Host (VHOST) subsystem;
• Framebuffer layer;
• BTRFS file system;
• File systems infrastructure;
• Ceph distributed file system;
• Ext4 file system;
• F2FS file system;
• FAT file system;
• GFS2 file system;
• HFS+ file system;
• JFS file system;
• Network file system (NFS) server daemon;
• NILFS2 file system;
• NTFS3 file system;
• OCFS2 file system;
• Proc file system;
• Pstore file system;
• Diskquota system;
• SMB network file system;
• XFS file system;
• Audit subsystem;
• Memory Management;
• IPv6 networking;
• Netfilter;
• Tracing infrastructure;
• Kernel kexec() syscall;
• RCU subsystem;
• Scheduler infrastructure;
• Scatterlist API;
• 9P file system network protocol;
• Asynchronous Transfer Mode (ATM) subsystem;
• B.A.T.M.A.N. meshing protocol;
• Bluetooth subsystem;
• Ethernet bridge;
• Ceph Core library;
• Networking core;
• IPv4 networking;
• KCM (Kernel Connection Multiplexor) sockets driver;
• Multipath TCP;
• NFC subsystem;
• RDS protocol;
• RxRPC session sockets;
• Network traffic control;
• SMC sockets;
• Sun RPC protocol;
• X.25 network layer;
• XFRM subsystem;
• AppArmor security module;
• Simplified Mandatory Access Control Kernel framework;
• SOF drivers;
• USB sound devices; (CVE-2025-40005, CVE-2025-71229, CVE-2025-71231, CVE-2025-71232, CVE-2025-71233, CVE-2025-71235, CVE-2025-71236, CVE-2025-71237, CVE-2025-71238, CVE-2025-71239, CVE-2025-71265, CVE-2025-71266, CVE-2025-71267, CVE-2025-71272, CVE-2025-71273, CVE-2025-71274, CVE-2025-71286, CVE-2025-71291, CVE-2025-71292, CVE-2025-71294, CVE-2025-71295, CVE-2025-71297, CVE-2025-71304, CVE-2025-71305, CVE-2026-23100, CVE-2026-23169, CVE-2026-23220, CVE-2026-23221, CVE-2026-23222, CVE-2026-23228, CVE-2026-23229, CVE-2026-23230, CVE-2026-23233, CVE-2026-23234, CVE-2026-23235, CVE-2026-23236, CVE-2026-23237, CVE-2026-23238, CVE-2026-23241, CVE-2026-23242, CVE-2026-23243, CVE-2026-23249, CVE-2026-23266, CVE-2026-23267, CVE-2026-23272, CVE-2026-23278, CVE-2026-23392, CVE-2026-23428, CVE-2026-23450, CVE-2026-23455, CVE-2026-31402, CVE-2026-31411, CVE-2026-31418, CVE-2026-31436, CVE-2026-31448, CVE-2026-31478, CVE-2026-31607,…

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

• ARM64 architecture;
• MIPS architecture;
• PowerPC architecture;
• x86 architecture;
• Block layer subsystem;
• Cryptographic API;
• ACPI drivers;
• ATM drivers;
• RNBD block device driver;
• Ublk userspace block driver;
• Bus devices;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• Clocksource drivers;
• CPU idle management framework;
• Hardware crypto device drivers;
• DMA engine subsystem;
• EFI core;
• GPIO subsystem;
• GPU drivers;
• HID subsystem;
• Hardware monitoring drivers;
• IIO subsystem;
• InfiniBand drivers;
• IOMMU subsystem;
• Multiple devices driver;
• Media drivers;
• Multifunction device drivers;
• Broadcom VK accelerator driver;
• MOST (Media Oriented Systems Transport) drivers;
• MTD block device drivers;
• Ethernet bonding driver;
• Network drivers;
• Mellanox network drivers;
• STMicroelectronics network drivers;
• NTB driver;
• NVME drivers;
• PCI subsystem;
• Performance monitor drivers;
• Pin controllers subsystem;
• x86 platform drivers;
• Power supply drivers;
• RapidIO drivers;
• RAS (Reliability, Availability, Serviceability) subsystem;
• Remote Processor subsystem;
• RPMSG subsystem;
• S/390 drivers;
• SCSI subsystem;
• MediaTek SoC drivers;
• Texas Instruments SoC drivers;
• SPI subsystem;
• Greybus lights staging drivers;
• Realtek RTL8723BS SDIO drivers;
• UFS subsystem;
• ChipIdea USB driver;
• DesignWare USB3 driver;
• USB over IP driver;
• vDPA drivers;
• Virtio Host (VHOST) subsystem;
• Framebuffer layer;
• BTRFS file system;
• File systems infrastructure;
• Ceph distributed file system;
• Ext4 file system;
• F2FS file system;
• FAT file system;
• GFS2 file system;
• HFS+ file system;
• JFS file system;
• Network file system (NFS) server daemon;
• NILFS2 file system;
• NTFS3 file system;
• OCFS2 file system;
• Proc file system;
• Pstore file system;
• Diskquota system;
• SMB network file system;
• XFS file system;
• Audit subsystem;
• Memory Management;
• IPv6 networking;
• Netfilter;
• Tracing infrastructure;
• Kernel kexec() syscall;
• RCU subsystem;
• Scheduler infrastructure;
• Scatterlist API;
• 9P file system network protocol;
• Asynchronous Transfer Mode (ATM) subsystem;
• B.A.T.M.A.N. meshing protocol;
• Bluetooth subsystem;
• Ethernet bridge;
• Ceph Core library;
• Networking core;
• IPv4 networking;
• KCM (Kernel Connection Multiplexor) sockets driver;
• Multipath TCP;
• NFC subsystem;
• RDS protocol;
• RxRPC session sockets;
• Network traffic control;
• SMC sockets;
• Sun RPC protocol;
• X.25 network layer;
• XFRM subsystem;
• AppArmor security module;
• Simplified Mandatory Access Control Kernel framework;
• SOF drivers;
• USB sound devices; (CVE-2025-40005, CVE-2025-71229, CVE-2025-71231, CVE-2025-71232, CVE-2025-71233, CVE-2025-71235, CVE-2025-71236, CVE-2025-71237, CVE-2025-71238, CVE-2025-71239, CVE-2025-71265, CVE-2025-71266, CVE-2025-71267, CVE-2025-71272, CVE-2025-71273, CVE-2025-71274, CVE-2025-71286, CVE-2025-71291, CVE-2025-71292, CVE-2025-71294, CVE-2025-71295, CVE-2025-71297, CVE-2025-71304, CVE-2025-71305, CVE-2026-23100, CVE-2026-23169, CVE-2026-23220, CVE-2026-23221, CVE-2026-23222, CVE-2026-23228, CVE-2026-23229, CVE-2026-23230, CVE-2026-23233, CVE-2026-23234, CVE-2026-23235, CVE-2026-23236, CVE-2026-23237, CVE-2026-23238, CVE-2026-23241, CVE-2026-23242, CVE-2026-23243, CVE-2026-23249, CVE-2026-23266, CVE-2026-23267, CVE-2026-23272, CVE-2026-23278, CVE-2026-23392, CVE-2026-23428, CVE-2026-23450, CVE-2026-23455, CVE-2026-31402, CVE-2026-31411, CVE-2026-31418, CVE-2026-31436, CVE-2026-31448, CVE-2026-31478, CVE-2026-31607,…

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

• ARM64 architecture;
• MIPS architecture;
• PowerPC architecture;
• x86 architecture;
• Block layer subsystem;
• Cryptographic API;
• ACPI drivers;
• ATM drivers;
• RNBD block device driver;
• Ublk userspace block driver;
• Bus devices;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• Clocksource drivers;
• CPU idle management framework;
• Hardware crypto device drivers;
• DMA engine subsystem;
• EFI core;
• GPIO subsystem;
• GPU drivers;
• HID subsystem;
• Hardware monitoring drivers;
• IIO subsystem;
• InfiniBand drivers;
• IOMMU subsystem;
• Multiple devices driver;
• Media drivers;
• Multifunction device drivers;
• Broadcom VK accelerator driver;
• MOST (Media Oriented Systems Transport) drivers;
• MTD block device drivers;
• Ethernet bonding driver;
• Network drivers;
• Mellanox network drivers;
• STMicroelectronics network drivers;
• NTB driver;
• NVME drivers;
• PCI subsystem;
• Performance monitor drivers;
• Pin controllers subsystem;
• x86 platform drivers;
• Power supply drivers;
• RapidIO drivers;
• RAS (Reliability, Availability, Serviceability) subsystem;
• Remote Processor subsystem;
• RPMSG subsystem;
• S/390 drivers;
• SCSI subsystem;
• MediaTek SoC drivers;
• Texas Instruments SoC drivers;
• SPI subsystem;
• Greybus lights staging drivers;
• Realtek RTL8723BS SDIO drivers;
• UFS subsystem;
• ChipIdea USB driver;
• DesignWare USB3 driver;
• USB over IP driver;
• vDPA drivers;
• Virtio Host (VHOST) subsystem;
• Framebuffer layer;
• BTRFS file system;
• File systems infrastructure;
• Ceph distributed file system;
• Ext4 file system;
• F2FS file system;
• FAT file system;
• GFS2 file system;
• HFS+ file system;
• JFS file system;
• Network file system (NFS) server daemon;
• NILFS2 file system;
• NTFS3 file system;
• OCFS2 file system;
• Proc file system;
• Pstore file system;
• Diskquota system;
• SMB network file system;
• XFS file system;
• Audit subsystem;
• Memory Management;
• IPv6 networking;
• Netfilter;
• Tracing infrastructure;
• Kernel kexec() syscall;
• RCU subsystem;
• Scheduler infrastructure;
• Scatterlist API;
• 9P file system network protocol;
• Asynchronous Transfer Mode (ATM) subsystem;
• B.A.T.M.A.N. meshing protocol;
• Bluetooth subsystem;
• Ethernet bridge;
• Ceph Core library;
• Networking core;
• IPv4 networking;
• KCM (Kernel Connection Multiplexor) sockets driver;
• Multipath TCP;
• NFC subsystem;
• RDS protocol;
• RxRPC session sockets;
• Network traffic control;
• SMC sockets;
• Sun RPC protocol;
• X.25 network layer;
• XFRM subsystem;
• AppArmor security module;
• Simplified Mandatory Access Control Kernel framework;
• SOF drivers;
• USB sound devices; (CVE-2025-40005, CVE-2025-71229, CVE-2025-71231, CVE-2025-71232, CVE-2025-71233, CVE-2025-71235, CVE-2025-71236, CVE-2025-71237, CVE-2025-71238, CVE-2025-71239, CVE-2025-71265, CVE-2025-71266, CVE-2025-71267, CVE-2025-71272, CVE-2025-71273, CVE-2025-71274, CVE-2025-71286, CVE-2025-71291, CVE-2025-71292, CVE-2025-71294, CVE-2025-71295, CVE-2025-71297, CVE-2025-71304, CVE-2025-71305, CVE-2026-23100, CVE-2026-23169, CVE-2026-23220, CVE-2026-23221, CVE-2026-23222, CVE-2026-23228, CVE-2026-23229, CVE-2026-23230, CVE-2026-23233, CVE-2026-23234, CVE-2026-23235, CVE-2026-23236, CVE-2026-23237, CVE-2026-23238, CVE-2026-23241, CVE-2026-23242, CVE-2026-23243, CVE-2026-23249, CVE-2026-23266, CVE-2026-23267, CVE-2026-23272, CVE-2026-23278, CVE-2026-23392, CVE-2026-23428, CVE-2026-23450, CVE-2026-23455, CVE-2026-31402, CVE-2026-31411, CVE-2026-31418, CVE-2026-31436, CVE-2026-31448, CVE-2026-31478, CVE-2026-31607,…

It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43284, CVE-2026-43500, CVE-2026-45998, CVE-2026-46000)

It was discovered that a logic flaw existed in the XFRM ESP-in-TCP subsystem in the Linux kernel when handling socket buffer fragments. This flaw is known as Fragnesia. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43503, CVE-2026-46300)

Qualys discovered that a race condition existed in the ptrace subsystem of the Linux kernel when privileged processes are exiting. An unprivileged local attacker could use this issue to expose sensitive information. (CVE-2026-46333)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contain a memory leak when handling AppArmor notifications. A local attacker could use this to cause resource exhaustion. (CVE-2026-47326)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contain a NULL pointer dereference when handling AppArmor notifications. A local attacker could use this to cause a kernel oops. (CVE-2026-47327)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained an invalid free when handling AppArmor notifications. A local attacker could use this to corrupt kernel memory. (CVE-2026-47328)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained insufficient validation of AppArmor notification responses. A local attacker could use this to allow crafted responses to be processed. (CVE-2026-47329)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 used an uninitialized variable when handling AppArmor notifications. A local attacker could use this to cause incorrect caching of data. (CVE-2026-47330)

Tristan Madani discovered that Ubuntu Linux kernel 6.8 contained a use- after-free (UAF) bug. A local attacker could use this to cause memory corruption and, theoretically, arbitrary code execution. (CVE-2026-47331)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained an out-of-bounds (OOB) read when handling AppArmor notifications. A local attacker could use this to cause information disclosure of kernel memory. (CVE-2026-47332)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained a out-of-bounds (OOB) read when handling AppArmor notifications. A local attacker could use this to cause kernel memory corruption and, theoretically, influence processing of AppArmor policies. (CVE-2026-47333)

Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained incorrect holding of locks when handling AppArmor notifications. A local attacker could use this to cause a kernel panic or deadlock. (CVE-2026-47334)

Tristan Madani discovered that Ubuntu Linux kernel 6.8 contained a NULL pointer dereference when handling AppArmor notifications. A local attacker could use this to cause a kernel panic. (CVE-2026-47335)

Tristan Madani discovered that Ubuntu Linux kernel 6.8 used an uninitialized variable when handling AppArmor AF_INET/AF_INET6 socket mediation. A local attacker could use this to influence processing of fine- grained network socket mediation. (CVE-2026-47336)

Tristan Madani and Trevor Lawrence have each independently discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained a NULL pointer dereference when handling AppArmor network socket mediation. A local attacker could use this to cause a kernel oops. (CVE-2026-47337)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

• ARM64 architecture;
• MIPS architecture; …

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

• ARM64 architecture;
• MIPS architecture;
• PowerPC architecture;
• x86 architecture;
• Block layer subsystem;
• Cryptographic API;
• ACPI drivers;
• ATM drivers;
• RNBD block device driver;
• Ublk userspace block driver;
• Bus devices;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• Clocksource drivers;
• CPU idle management framework;
• Hardware crypto device drivers;
• DMA engine subsystem;
• EFI core;
• GPIO subsystem;
• GPU drivers;
• HID subsystem;
• Hardware monitoring drivers;
• IIO subsystem;
• InfiniBand drivers;
• IOMMU subsystem;
• Multiple devices driver;
• Media drivers;
• Multifunction device drivers;
• Broadcom VK accelerator driver;
• MOST (Media Oriented Systems Transport) drivers;
• MTD block device drivers;
• Ethernet bonding driver;
• Network drivers;
• Mellanox network drivers;
• STMicroelectronics network drivers;
• NTB driver;
• NVME drivers;
• PCI subsystem;
• Performance monitor drivers;
• Pin controllers subsystem;
• x86 platform drivers;
• Power supply drivers;
• RapidIO drivers;
• RAS (Reliability, Availability, Serviceability) subsystem;
• Remote Processor subsystem;
• RPMSG subsystem;
• S/390 drivers;
• SCSI subsystem;
• MediaTek SoC drivers;
• Texas Instruments SoC drivers;
• SPI subsystem;
• Greybus lights staging drivers;
• Realtek RTL8723BS SDIO drivers;
• UFS subsystem;
• ChipIdea USB driver;
• DesignWare USB3 driver;
• USB over IP driver;
• vDPA drivers;
• Virtio Host (VHOST) subsystem;
• Framebuffer layer;
• BTRFS file system;
• File systems infrastructure;
• Ceph distributed file system;
• Ext4 file system;
• F2FS file system;
• FAT file system;
• GFS2 file system;
• HFS+ file system;
• JFS file system;
• Network file system (NFS) server daemon;
• NILFS2 file system;
• NTFS3 file system;
• OCFS2 file system;
• Proc file system;
• Pstore file system;
• Diskquota system;
• SMB network file system;
• XFS file system;
• Audit subsystem;
• Memory Management;
• IPv6 networking;
• Netfilter;
• Tracing infrastructure;
• Kernel kexec() syscall;
• RCU subsystem;
• Scheduler infrastructure;
• Scatterlist API;
• 9P file system network protocol;
• Asynchronous Transfer Mode (ATM) subsystem;
• B.A.T.M.A.N. meshing protocol;
• Bluetooth subsystem;
• Ethernet bridge;
• Ceph Core library;
• Networking core;
• IPv4 networking;
• KCM (Kernel Connection Multiplexor) sockets driver;
• Multipath TCP;
• NFC subsystem;
• RDS protocol;
• RxRPC session sockets;
• Network traffic control;
• SMC sockets;
• Sun RPC protocol;
• X.25 network layer;
• XFRM subsystem;
• AppArmor security module;
• Simplified Mandatory Access Control Kernel framework;
• SOF drivers;
• USB sound devices; (CVE-2025-40005, CVE-2025-71229, CVE-2025-71231, CVE-2025-71232, CVE-2025-71235, CVE-2025-71236, CVE-2025-71237, CVE-2025-71238, CVE-2025-71239, CVE-2025-71265, CVE-2025-71266, CVE-2025-71267, CVE-2025-71272, CVE-2025-71273, CVE-2025-71274, CVE-2025-71286, CVE-2025-71291, CVE-2025-71292, CVE-2025-71294, CVE-2025-71295, CVE-2025-71297, CVE-2025-71304, CVE-2025-71305, CVE-2026-23100, CVE-2026-23169, CVE-2026-23220, CVE-2026-23221, CVE-2026-23222, CVE-2026-23228, CVE-2026-23229, CVE-2026-23230, CVE-2026-23233, CVE-2026-23234, CVE-2026-23235, CVE-2026-23236, CVE-2026-23237, CVE-2026-23238, CVE-2026-23241, CVE-2026-23242, CVE-2026-23243, CVE-2026-23249, CVE-2026-23266, CVE-2026-23267, CVE-2026-23272, CVE-2026-23278, CVE-2026-23392, CVE-2026-23428, CVE-2026-23450, CVE-2026-23455, CVE-2026-31402, CVE-2026-31411, CVE-2026-31418, CVE-2026-31436, CVE-2026-31448, CVE-2026-31478, CVE-2026-31607, CVE-2026-31637,…

It was discovered that some AMD processors did not properly clear data in the floating point divider unit during speculative execution. A local attacker could use this to expose sensitive information. (CVE-2025-54505)

It was discovered that some AMD Zen 2 processors did not properly isolate shared resources in the operation cache. A local attacker could possibly use this issue to corrupt instructions executed at a higher privilege level, resulting in privilege escalation. (CVE-2025-54518)

It was discovered that some AMD Zen 5 processors supporting RDSEED instruction did not properly handle entropy, potentially resulting in the consumption of insufficiently random values. A local attacker could possibly use this issue to influence the values returned by the RDSEED instruction causing loss of confidentiality and integrity. (CVE-2025-62626)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

• ARM64 architecture;
• MIPS architecture;
• PowerPC architecture;
• RISC-V architecture;
• S390 architecture;
• x86 architecture;
• Block layer subsystem;
• Cryptographic API;
• Compute Acceleration Framework;
• ACPI drivers;
• Serial ATA and Parallel ATA drivers;
• ATM drivers;
• Drivers core;
• Power management core;
• DRBD Distributed Replicated Block Device drivers;
• Rados block device (RBD) driver;
• RNBD block device driver;
• Ublk userspace block driver;
• Compressed RAM block device driver;
• Bluetooth drivers;
• Bus devices;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• Clocksource drivers;
• Data acquisition framework and drivers;
• Counter interface drivers;
• CPU frequency scaling framework;
• CPU idle management framework;
• Hardware crypto device drivers;
• CXL (Compute Express Link) drivers;
• DMA engine subsystem;
• EDAC drivers;
• EFI core;
• GPIO subsystem;
• GPU drivers;
• Greybus drivers;
• HID subsystem;
• Hardware monitoring drivers;
• I2C subsystem;
• IIO subsystem;
• IIO ADC drivers;
• InfiniBand drivers;
• Input Device (Miscellaneous) drivers;
• IOMMU subsystem;
• IRQ chip drivers;
• LED subsystem;
• Mailbox framework;
• Multiple devices driver;
• Media drivers;
• MediaTek SMI driver;
• NVIDIA Tegra memory controller driver;
• Multifunction device drivers;
• Broadcom VK accelerator driver;
• Fastrpc Driver;
• IBM Advanced System Management driver;
• MMC subsystem;
• MOST (Media Oriented Systems Transport) drivers;
• MTD block device drivers;
• Network drivers;
• Ethernet bonding driver;
• Mellanox network drivers;
• Microsoft Azure Network Adapter (MANA) driver;
• STMicroelectronics network drivers;
• Ethernet team driver;
• MediaTek network drivers;
• Near Field Communication (NFC) drivers;
• NTB driver;
• NVDIMM (Non-Volatile Memory Device) drivers;
• NVME drivers;
• Device tree and open firmware driver;
• PCI subsystem;
• Performance monitor drivers;
• Pin controllers subsystem;
• x86 platform drivers;
• Broadcom BCM2835 power domain driver;
• Generic PM domains;
• i.MX PM domains;
• Power supply drivers;
• RapidIO drivers;
• RAS (Reliability, Availability, Serviceability) subsystem;
• Remote Processor subsystem;
• RPMSG subsystem;
• S/390 drivers;
• SCSI subsystem;
• SLIMbus drivers;
• Freescale SoC drivers;
• MediaTek SoC drivers;
• Microchip PolarFire SoC system controller driver;
• Texas Instruments SoC drivers;
• SPI subsystem;
• Greybus lights staging drivers;
• Media staging drivers;
• Realtek RTL8723BS SDIO drivers;
• SM750 framebuffer staging driver;
• TCM subsystem;
• Thermal drivers;
• TTY drivers;
• UFS subsystem;
• Cadence USB3 driver;
• ChipIdea USB driver;
• USB Device Class drivers;
• ULPI bus;
• USB core drivers;
• DesignWare…

It was discovered that some AMD processors did not properly clear data in the floating point divider unit during speculative execution. A local attacker could use this to expose sensitive information. (CVE-2025-54505)

It was discovered that some AMD Zen 2 processors did not properly isolate shared resources in the operation cache. A local attacker could possibly use this issue to corrupt instructions executed at a higher privilege level, resulting in privilege escalation. (CVE-2025-54518)

It was discovered that some AMD Zen 5 processors supporting RDSEED instruction did not properly handle entropy, potentially resulting in the consumption of insufficiently random values. A local attacker could possibly use this issue to influence the values returned by the RDSEED instruction causing loss of confidentiality and integrity. (CVE-2025-62626)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

• ARM64 architecture;
• MIPS architecture;
• PowerPC architecture;
• RISC-V architecture;
• S390 architecture;
• x86 architecture;
• Block layer subsystem;
• Cryptographic API;
• Compute Acceleration Framework;
• ACPI drivers;
• Serial ATA and Parallel ATA drivers;
• ATM drivers;
• Drivers core;
• Power management core;
• DRBD Distributed Replicated Block Device drivers;
• Rados block device (RBD) driver;
• RNBD block device driver;
• Ublk userspace block driver;
• Compressed RAM block device driver;
• Bluetooth drivers;
• Bus devices;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• Clocksource drivers;
• Data acquisition framework and drivers;
• Counter interface drivers;
• CPU frequency scaling framework;
• CPU idle management framework;
• Hardware crypto device drivers;
• CXL (Compute Express Link) drivers;
• DMA engine subsystem;
• EDAC drivers;
• EFI core;
• GPIO subsystem;
• GPU drivers;
• Greybus drivers;
• HID subsystem;
• Hardware monitoring drivers;
• I2C subsystem;
• IIO subsystem;
• IIO ADC drivers;
• InfiniBand drivers;
• Input Device (Miscellaneous) drivers;
• IOMMU subsystem;
• IRQ chip drivers;
• LED subsystem;
• Mailbox framework;
• Multiple devices driver;
• Media drivers;
• MediaTek SMI driver;
• NVIDIA Tegra memory controller driver;
• Multifunction device drivers;
• Broadcom VK accelerator driver;
• Fastrpc Driver;
• IBM Advanced System Management driver;
• MMC subsystem;
• MOST (Media Oriented Systems Transport) drivers;
• MTD block device drivers;
• Network drivers;
• Ethernet bonding driver;
• Mellanox network drivers;
• Microsoft Azure Network Adapter (MANA) driver;
• STMicroelectronics network drivers;
• Ethernet team driver;
• MediaTek network drivers;
• Near Field Communication (NFC) drivers;
• NTB driver;
• NVDIMM (Non-Volatile Memory Device) drivers;
• NVME drivers;
• Device tree and open firmware driver;
• PCI subsystem;
• Performance monitor drivers;
• Pin controllers subsystem;
• x86 platform drivers;
• Broadcom BCM2835 power domain driver;
• Generic PM domains;
• i.MX PM domains;
• Power supply drivers;
• RapidIO drivers;
• RAS (Reliability, Availability, Serviceability) subsystem;
• Remote Processor subsystem;
• RPMSG subsystem;
• S/390 drivers;
• SCSI subsystem;
• SLIMbus drivers;
• Freescale SoC drivers;
• MediaTek SoC drivers;
• Microchip PolarFire SoC system controller driver;
• Texas Instruments SoC drivers;
• SPI subsystem;
• Greybus lights staging drivers;
• Media staging drivers;
• Realtek RTL8723BS SDIO drivers;
• SM750 framebuffer staging driver;
• TCM subsystem;
• Thermal drivers;
• TTY drivers;
• UFS subsystem;
• Cadence USB3 driver;
• ChipIdea USB driver;
• USB Device Class drivers;
• ULPI bus;
• USB core drivers;
• DesignWare…

It was discovered that some AMD processors did not properly clear data in the floating point divider unit during speculative execution. A local attacker could use this to expose sensitive information. (CVE-2025-54505)

It was discovered that some AMD Zen 2 processors did not properly isolate shared resources in the operation cache. A local attacker could possibly use this issue to corrupt instructions executed at a higher privilege level, resulting in privilege escalation. (CVE-2025-54518)

It was discovered that some AMD Zen 5 processors supporting RDSEED instruction did not properly handle entropy, potentially resulting in the consumption of insufficiently random values. A local attacker could possibly use this issue to influence the values returned by the RDSEED instruction causing loss of confidentiality and integrity. (CVE-2025-62626)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

• ARM64 architecture;
• MIPS architecture;
• PowerPC architecture;
• RISC-V architecture;
• S390 architecture;
• x86 architecture;
• Block layer subsystem;
• Cryptographic API;
• Compute Acceleration Framework;
• ACPI drivers;
• Serial ATA and Parallel ATA drivers;
• ATM drivers;
• Drivers core;
• Power management core;
• DRBD Distributed Replicated Block Device drivers;
• Rados block device (RBD) driver;
• RNBD block device driver;
• Ublk userspace block driver;
• Compressed RAM block device driver;
• Bluetooth drivers;
• Bus devices;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• Clocksource drivers;
• Data acquisition framework and drivers;
• Counter interface drivers;
• CPU frequency scaling framework;
• CPU idle management framework;
• Hardware crypto device drivers;
• CXL (Compute Express Link) drivers;
• DMA engine subsystem;
• EDAC drivers;
• EFI core;
• GPIO subsystem;
• GPU drivers;
• Greybus drivers;
• HID subsystem;
• Hardware monitoring drivers;
• I2C subsystem;
• IIO subsystem;
• IIO ADC drivers;
• InfiniBand drivers;
• Input Device (Miscellaneous) drivers;
• IOMMU subsystem;
• IRQ chip drivers;
• LED subsystem;
• Mailbox framework;
• Multiple devices driver;
• Media drivers;
• MediaTek SMI driver;
• NVIDIA Tegra memory controller driver;
• Multifunction device drivers;
• Broadcom VK accelerator driver;
• Fastrpc Driver;
• IBM Advanced System Management driver;
• MMC subsystem;
• MOST (Media Oriented Systems Transport) drivers;
• MTD block device drivers;
• Network drivers;
• Ethernet bonding driver;
• Mellanox network drivers;
• Microsoft Azure Network Adapter (MANA) driver;
• STMicroelectronics network drivers;
• Ethernet team driver;
• MediaTek network drivers;
• Near Field Communication (NFC) drivers;
• NTB driver;
• NVDIMM (Non-Volatile Memory Device) drivers;
• NVME drivers;
• Device tree and open firmware driver;
• PCI subsystem;
• Performance monitor drivers;
• Pin controllers subsystem;
• x86 platform drivers;
• Broadcom BCM2835 power domain driver;
• Generic PM domains;
• i.MX PM domains;
• Power supply drivers;
• RapidIO drivers;
• RAS (Reliability, Availability, Serviceability) subsystem;
• Remote Processor subsystem;
• RPMSG subsystem;
• S/390 drivers;
• SCSI subsystem;
• SLIMbus drivers;
• Freescale SoC drivers;
• MediaTek SoC drivers;
• Microchip PolarFire SoC system controller driver;
• Texas Instruments SoC drivers;
• SPI subsystem;
• Greybus lights staging drivers;
• Media staging drivers;
• Realtek RTL8723BS SDIO drivers;
• SM750 framebuffer staging driver;
• TCM subsystem;
• Thermal drivers;
• TTY drivers;
• UFS subsystem;
• Cadence USB3 driver;
• ChipIdea USB driver;
• USB Device Class drivers;
• ULPI bus;
• USB core drivers;
• DesignWare…

It was discovered that some AMD processors did not properly clear data in the floating point divider unit during speculative execution. A local attacker could use this to expose sensitive information. (CVE-2025-54505)

It was discovered that some AMD Zen 2 processors did not properly isolate shared resources in the operation cache. A local attacker could possibly use this issue to corrupt instructions executed at a higher privilege level, resulting in privilege escalation. (CVE-2025-54518)

It was discovered that some AMD Zen 5 processors supporting RDSEED instruction did not properly handle entropy, potentially resulting in the consumption of insufficiently random values. A local attacker could possibly use this issue to influence the values returned by the RDSEED instruction causing loss of confidentiality and integrity. (CVE-2025-62626)

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems:

• ARM64 architecture;
• MIPS architecture;
• PowerPC architecture;
• RISC-V architecture;
• S390 architecture;
• x86 architecture;
• Block layer subsystem;
• Cryptographic API;
• Compute Acceleration Framework;
• ACPI drivers;
• Serial ATA and Parallel ATA drivers;
• ATM drivers;
• Drivers core;
• Power management core;
• DRBD Distributed Replicated Block Device drivers;
• Rados block device (RBD) driver;
• RNBD block device driver;
• Ublk userspace block driver;
• Compressed RAM block device driver;
• Bluetooth drivers;
• Bus devices;
• Character device driver;
• TPM device driver;
• Clock framework and drivers;
• Clocksource drivers;
• Data acquisition framework and drivers;
• Counter interface drivers;
• CPU frequency scaling framework;
• CPU idle management framework;
• Hardware crypto device drivers;
• CXL (Compute Express Link) drivers;
• DMA engine subsystem;
• EDAC drivers;
• EFI core;
• GPIO subsystem;
• GPU drivers;
• Greybus drivers;
• HID subsystem;
• Hardware monitoring drivers;
• I2C subsystem;
• IIO subsystem;
• IIO ADC drivers;
• InfiniBand drivers;
• Input Device (Miscellaneous) drivers;
• IOMMU subsystem;
• IRQ chip drivers;
• LED subsystem;
• Mailbox framework;
• Multiple devices driver;
• Media drivers;
• MediaTek SMI driver;
• NVIDIA Tegra memory controller driver;
• Multifunction device drivers;
• Broadcom VK accelerator driver;
• Fastrpc Driver;
• IBM Advanced System Management driver;
• MMC subsystem;
• MOST (Media Oriented Systems Transport) drivers;
• MTD block device drivers;
• Network drivers;
• Ethernet bonding driver;
• Mellanox network drivers;
• Microsoft Azure Network Adapter (MANA) driver;
• STMicroelectronics network drivers;
• Ethernet team driver;
• MediaTek network drivers;
• Near Field Communication (NFC) drivers;
• NTB driver;
• NVDIMM (Non-Volatile Memory Device) drivers;
• NVME drivers;
• Device tree and open firmware driver;
• PCI subsystem;
• Performance monitor drivers;
• Pin controllers subsystem;
• x86 platform drivers;
• Broadcom BCM2835 power domain driver;
• Generic PM domains;
• i.MX PM domains;
• Power supply drivers;
• RapidIO drivers;
• RAS (Reliability, Availability, Serviceability) subsystem;
• Remote Processor subsystem;
• RPMSG subsystem;
• S/390 drivers;
• SCSI subsystem;
• SLIMbus drivers;
• Freescale SoC drivers;
• MediaTek SoC drivers;
• Microchip PolarFire SoC system controller driver;
• Texas Instruments SoC drivers;
• SPI subsystem;
• Greybus lights staging drivers;
• Media staging drivers;
• Realtek RTL8723BS SDIO drivers;
• SM750 framebuffer staging driver;
• TCM subsystem;
• Thermal drivers;
• TTY drivers;
• UFS subsystem;
• Cadence USB3 driver;
• ChipIdea USB driver;
• USB Device Class drivers;
• ULPI bus;
• USB core drivers;
• DesignWare…