CVE-2019-8980

A memory leak in the kernel_read_file function in fs/exec.c in the Linux kernel through 4.20.11 allows attackers to cause a denial of service (memory consumption) by triggering vfs_read failures.

A memory leak in the kernel_read_file function in fs/exec.c in the Linux kernel through 4.20.11 allows attackers to cause a denial of service (memory consumption) by triggering vfs_read failures.

The openSUSE Leap 15.0 was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2019-2024: A use-after-free when disconnecting a source was fixed which could lead to crashes. bnc#1129179).
• CVE-2019-3819: A flaw was found in the Linux kernel in the function hid_debug_events_read() in drivers/hid/hid-debug.c file which may enter an infinite loop with certain parameters passed from a userspace. A local privileged user ('root') can cause a system lock up and a denial of service. Versions from v4.18 and newer are vulnerable (bnc#1123161).
• CVE-2019-7308: kernel/bpf/verifier.c performed undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks (bnc#1124055).
• CVE-2019-8912: af_alg_release() in crypto/af_alg.c neglected to set a NULL value for a certain structure member, which leads to a use-after-free in sockfs_setattr (bnc#1125907).
• CVE-2019-8980: A memory leak in the kernel_read_file function in fs/exec.c allowed attackers to cause a denial of service (memory consumption) by triggering vfs_read failures (bnc#1126209).
• CVE-2019-9213: expand_downwards in mm/mmap.c lacked a check for the mmap minimum address, which made it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task (bnc#1128166).

The following non-security bugs were fixed:

• 9p/net: fix memory leak in p9_client_create (bsc#1051510).
• 9p: use inode->i_lock to protect i_size_write() under 32-bit (bsc#1051510).
• acpi: acpi_pad: Do not launch acpi_pad threads on idle cpus (bsc#1113399).
• acpi/APEI: Clear GHES block_status before panic() (bsc#1051510).
• acpi/device_sysfs: Avoid OF modalias creation for removed device (bsc#1051510).
• acpi/nfit: Fix bus command validation (bsc#1051510).
• acpi: NUMA: Use correct type for printing addresses on i386-PAE (bsc#1051510).
• acpi / video: Extend chassis-type detection with a 'Lunch Box' check (bsc#1051510).
• acpi / video: Refactor and fix dmi_is_desktop() (bsc#1051510).
• alsa: bebob: use more identical mod_alias for Saffire Pro 10 I/O against Liquid Saffire 56 (bsc#1051510).
• alsa: compress: prevent potential divide by zero bugs (bsc#1051510).
• alsa: echoaudio: add a check for ioremap_nocache (bsc#1051510).
• alsa: firewire: add const qualifier to identifiers for read-only symbols (bsc#1051510).
• alsa: firewire-motu: add a flag for AES/EBU on XLR interface (bsc#1051510).
• alsa: firewire-motu: add specification flag for position of flag for MIDI messages (bsc#1051510).
• alsa: firewire-motu: add support for MOTU Audio Express (bsc#1051510).
• alsa: firewire-motu: add support for Motu Traveler (bsc#1051510).
• alsa: firewire-motu: fix construction of PCM frame for capture direction (bsc#1051510).
• alsa: firewire-motu: use 'version' field of unit directory to identify model (bsc#1051510).
• alsa: hda - add Lenovo IdeaCentre B550 to the power_save_blacklist (bsc#1051510).
• alsa: hda - Add quirk for HP EliteBook 840 G5 (bsc#1051510).
• alsa: hda - Enforces runtime_resume after S3 and S4 for each codec (bsc#1051510).
• alsa: hda/realtek - Add support for Acer Aspire E5-523G/ES1-432 headset mic (bsc#1051510).
• alsa: hda/realtek: Disable PC beep in passthrough on alc285 (bsc#1051510).
• alsa: hda/realtek: Enable ASUS X441MB and X705FD headset MIC with ALC256 (bsc#1051510).
• alsa: hda/realtek: Enable audio jacks of ASUS UX362FA with ALC294 (bsc#1051510).
• alsa: hda/realtek: Enable headset MIC of Acer AIO with ALC286 (bsc#1051510).
• alsa: hda/realtek: Enable headset MIC of Acer Aspire Z24-890 with ALC286 (bsc#1051510).
• alsa: hda/realtek: Enable headset mic of ASUS P5440FF with ALC256 (bsc#1051510).
• alsa: hda/realtek - Headset microphone and internal speaker support for System76 oryp5 (bsc#1051510).
• alsa: hda/realtek - Headset microphone support…

The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2018-20669: Missing access control checks in ioctl of gpu/drm/i915 driver were fixed which might have lead to information leaks. (bnc#1122971).
• CVE-2019-3459, CVE-2019-3460: The Bluetooth stack suffered from two remote information leak vulnerabilities in the code that handles incoming L2cap configuration packets (bsc#1120758).
• CVE-2019-3819: A flaw was found in the function hid_debug_events_read() in drivers/hid/hid-debug.c file which may enter an infinite loop with certain parameters passed from a userspace. A local privileged user ('root') can cause a system lock up and a denial of service. (bnc#1123161).
• CVE-2019-6974: kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandled reference counting because of a race condition, leading to a use-after-free (bnc#1124728 ).
• CVE-2019-7221: Fixed a use-after-free vulnerability in the KVM hypervisor related to the emulation of a preemption timer, allowing an guest user/process to crash the host kernel. (bsc#1124732).
• CVE-2019-7222: Fixed an information leakage in the KVM hypervisor related to handling page fault exceptions, which allowed a guest user/process to use this flaw to leak the host's stack memory contents to a guest (bsc#1124735).
• CVE-2019-7308: kernel/bpf/verifier.c performed undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks (bnc#1124055).
• CVE-2019-8912: af_alg_release() in crypto/af_alg.c neglects to set a NULL value for a certain structure member, which leads to a use-after-free in sockfs_setattr (bnc#1125907).
• CVE-2019-8980: A memory leak in the kernel_read_file function in fs/exec.c allowed attackers to cause a denial of service (memory consumption) by triggering vfs_read failures (bnc#1126209).
• CVE-2019-9213: expand_downwards in mm/mmap.c lacked a check for the mmap minimum address, which made it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task (bnc#1128166).
• CVE-2019-2024: A use-after-free when disconnecting a source was fixed which could lead to crashes. bnc#1129179).

The following non-security bugs were fixed:

• 6lowpan: iphc: reset mac_header after decompress to fix panic (bsc#1051510).
• 9p: clear dangling pointers in p9stat_free (bsc#1051510).
• 9p locks: fix glock.client_id leak in do_lock (bsc#1051510).
• 9p/net: fix memory leak in p9_client_create (bsc#1051510).
• 9p/net: put a lower bound on msize (bsc#1051510).
• 9p: use inode->i_lock to protect i_size_write() under 32-bit (bsc#1051510).
• acpi/APEI: Clear GHES block_status before panic() (bsc#1051510).
• acpi/device_sysfs: Avoid OF modalias creation for removed device (bsc#1051510).
• acpi/nfit: Block function zero DSMs (bsc#1051510).
• acpi, nfit: Fix Address Range Scrub completion tracking (bsc#1124969).
• acpi/nfit: Fix bus command validation (bsc#1051510).
• acpi/nfit: Fix command-supported detection (bsc#1051510).
• acpi/nfit: Fix race accessing memdev in nfit_get_smbios_id() (bsc#1122662).
• acpi/nfit: Fix user-initiated ARS to be 'ARS-long' rather than 'ARS-short' (bsc#1124969).
• acpi: NUMA: Use correct type for printing addresses on i386-PAE (bsc#1051510).
• acpi: power: Skip duplicate power resource references in _PRx (bsc#1051510).
• acpi / video: Extend chassis-type detection with a 'Lunch Box' check (bsc#1051510).
• acpi / video: Refactor and fix dmi_is_desktop() (bsc#1051510).
• add 1 entry 2bcbd406715dca256912b9c5ae449c7968f15705
• Add delay-init quirk for Corsair K70 RGB keyboards (bsc#1087092).
• af_iucv: Move sockaddr length checks to before accessing sa_family in bind and connect handlers (bsc#1051510).
• alsa: bebob: fix model-id of unit for Apogee Ensemble (bsc#1051510).
• alsa: bebob:…

The SUSE Linux Enterprise Server 12 SP4 Azure kernel was updated to fix various issues.

The following security bugs were fixed:

• CVE-2019-2024: A use-after-free when disconnecting a source was fixed which could lead to crashes. bnc#1129179).
• CVE-2019-9213: expand_downwards in mm/mmap.c lacked a check for the mmap minimum address, which made it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task (bnc#1128166 1128378 1129016).
• CVE-2019-8980: A memory leak in the kernel_read_file function in fs/exec.c allowed attackers to cause a denial of service (memory consumption) by triggering vfs_read failures (bnc#1126209).
• CVE-2019-3819: A flaw was found in the function hid_debug_events_read() in drivers/hid/hid-debug.c file which may enter an infinite loop with certain parameters passed from a userspace. A local privileged user ('root') can cause a system lock up and a denial of service. (bnc#1123161).
• CVE-2019-8912: af_alg_release() in crypto/af_alg.c neglected to set a NULL value for a certain structure member, which led to a use-after-free in sockfs_setattr (bnc#1125907 1126284).
• CVE-2019-7308: kernel/bpf/verifier.c performed undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks (bnc#1124055).
• CVE-2019-3459, CVE-2019-3460: The Bluetooth stack suffered from two remote information leak vulnerabilities in the code that handles incoming L2cap configuration packets (bsc#1120758).
• CVE-2019-7221: Fixed a use-after-free vulnerability in the KVM hypervisor related to the emulation of a preemption timer, allowing an guest user/process to crash the host kernel. (bsc#1124732).
• CVE-2019-7222: Fixed an information leakage in the KVM hypervisor related to handling page fault exceptions, which allowed a guest user/process to use this flaw to leak the host's stack memory contents to a guest (bsc#1124735).
• CVE-2019-6974: kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandled reference counting because of a race condition, leading to a use-after-free (bnc#1124728).
• CVE-2018-20669: An issue where a provided address with access_ok() is not checked was discovered in i915_gem_execbuffer2_ioctl in drivers/gpu/drm/i915/i915_gem_execbuffer.c where a local attacker can craft a malicious IOCTL function call to overwrite arbitrary kernel memory, resulting in a Denial of Service or privilege escalation (bnc#1122971).

The following non-security bugs were fixed:

• 6lowpan: iphc: reset mac_header after decompress to fix panic (bsc#1051510).
• 9p: clear dangling pointers in p9stat_free (bsc#1051510).
• 9p locks: fix glock.client_id leak in do_lock (bsc#1051510).
• 9p/net: fix memory leak in p9_client_create (bsc#1051510).
• 9p/net: put a lower bound on msize (bsc#1051510).
• 9p: use inode->i_lock to protect i_size_write() under 32-bit (bsc#1051510).
• acpi/APEI: Clear GHES block_status before panic() (bsc#1051510).
• acpi / device_sysfs: Avoid OF modalias creation for removed device (bsc#1051510).
• acpi/nfit: Block function zero DSMs (bsc#1051510).
• acpi, nfit: Fix Address Range Scrub completion tracking (bsc#1124969).
• acpi/nfit: Fix bus command validation (bsc#1051510).
• acpi/nfit: Fix command-supported detection (bsc#1051510).
• acpi/nfit: Fix race accessing memdev in nfit_get_smbios_id() (bsc#1122662).
• acpi/nfit: Fix user-initiated ARS to be 'ARS-long' rather than 'ARS-short' (bsc#1124969).
• acpi: NUMA: Use correct type for printing addresses on i386-PAE (bsc#1051510).
• acpi: power: Skip duplicate power resource references in _PRx (bsc#1051510).
• acpi / video: Extend chassis-type detection with a 'Lunch Box' check (bsc#1051510).
• acpi / video: Refactor and fix dmi_is_desktop() (bsc#1051510).
• add 1 entry 2bcbd406715dca256912b9c5ae449c7968f15705
• Add delay-init quirk for Corsair K70 RGB keyboards…

The SUSE Linux Enterprise 15 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2019-2024: A use-after-free when disconnecting a source was fixed which could lead to crashes. bnc#1129179).
• CVE-2019-9213: expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which made it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task (bnc#1128166).
• CVE-2019-8980: A memory leak in the kernel_read_file function in fs/exec.c allowed attackers to cause a denial of service (memory consumption) by triggering vfs_read failures (bnc#1126209).
• CVE-2019-3819: A flaw was found in the function hid_debug_events_read() in drivers/hid/hid-debug.c file which may enter an infinite loop with certain parameters passed from a userspace. A local privileged user ('root') can cause a system lock up and a denial of service. Versions from v4.18 and newer are vulnerable (bnc#1123161).
• CVE-2019-8912: af_alg_release() in crypto/af_alg.c neglects to set a NULL value for a certain structure member, which leads to a use-after-free in sockfs_setattr (bnc#1125907).
• CVE-2019-7308: kernel/bpf/verifier.c performed undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks (bnc#1124055).
• CVE-2019-3459, CVE-2019-3460: The Bluetooth stack suffered from two remote information leak vulnerabilities in the code that handles incoming L2cap configuration packets (bsc#1120758).
• CVE-2019-7221: Fixed a user-after-free vulnerability in the KVM hypervisor related to the emulation of a preemption timer, allowing an guest user/process to crash the host kernel. (bsc#1124732).
• CVE-2019-7222: Fixed an information leakage in the KVM hypervisor related to handling page fault exceptions, which allowed a guest user/process to use this flaw to leak the host's stack memory contents to a guest (bsc#1124735).
• CVE-2019-6974: kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandled reference counting because of a race condition, leading to a use-after-free (bnc#1124728).
• CVE-2018-20669: Missing access control checks in ioctl of gpu/drm/i915 driver were fixed which might have lead to information leaks. (bnc#1122971).

The following non-security bugs were fixed:

• 6lowpan: iphc: reset mac_header after decompress to fix panic (bsc#1051510).
• 9p: clear dangling pointers in p9stat_free (bsc#1051510).
• 9p locks: fix glock.client_id leak in do_lock (bsc#1051510).
• 9p/net: fix memory leak in p9_client_create (bsc#1051510).
• 9p/net: put a lower bound on msize (bsc#1051510).
• 9p: use inode->i_lock to protect i_size_write() under 32-bit (bsc#1051510).
• ACPI/APEI: Clear GHES block_status before panic() (bsc#1051510).
• acpi / device_sysfs: Avoid OF modalias creation for removed device (bsc#1051510).
• acpi/nfit: Block function zero DSMs (bsc#1051510).
• acpi, nfit: Fix Address Range Scrub completion tracking (bsc#1124969).
• acpi/nfit: Fix bus command validation (bsc#1051510).
• acpi/nfit: Fix command-supported detection (bsc#1051510).
• acpi/nfit: Fix race accessing memdev in nfit_get_smbios_id() (bsc#1122662).
• acpi/nfit: Fix user-initiated ARS to be 'ARS-long' rather than 'ARS-short' (bsc#1124969).
• acpi: NUMA: Use correct type for printing addresses on i386-PAE (bsc#1051510).
• acpi: power: Skip duplicate power resource references in _PRx (bsc#1051510).
• acpi / video: Extend chassis-type detection with a 'Lunch Box' check (bsc#1051510).
• acpi / video: Refactor and fix dmi_is_desktop() (bsc#1051510).
• add 1 entry 2bcbd406715dca256912b9c5ae449c7968f15705
• Add delay-init quirk for Corsair K70 RGB keyboards (bsc#1087092).
• add mainline tags for two hyperv iommu patches
• Adjust a commit id in a nvme patch to make our scripts happy
• af_iucv: Move sockaddr length checks to…

The SUSE Linux Enterprise 15 Azure kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

• CVE-2019-2024: A use-after-free when disconnecting a source was fixed which could lead to crashes. bnc#1129179).
• CVE-2019-9213: expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which made it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task (bnc#1128166).
• CVE-2019-8980: A memory leak in the kernel_read_file function in fs/exec.c allowed attackers to cause a denial of service (memory consumption) by triggering vfs_read failures (bnc#1126209).
• CVE-2019-3819: A flaw was found in the function hid_debug_events_read() in drivers/hid/hid-debug.c file which may enter an infinite loop with certain parameters passed from a userspace. A local privileged user ('root') can cause a system lock up and a denial of service. (bnc#1123161).
• CVE-2019-8912: af_alg_release() in crypto/af_alg.c neglects to set a NULL value for a certain structure member, which leads to a use-after-free in sockfs_setattr (bnc#1125907).
• CVE-2019-7308: kernel/bpf/verifier.c performed undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks (bnc#1124055).
• CVE-2019-3459, CVE-2019-3460: The Bluetooth stack suffered from two remote information leak vulnerabilities in the code that handles incoming L2cap configuration packets (bsc#1120758).
• CVE-2019-7221: The KVM implementation had a Use-after-Free problem (bnc#1124732).
• CVE-2019-7222: The KVM implementation had an Information Leak (bnc#1124735).
• CVE-2019-6974: kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandled reference counting because of a race condition, leading to a use-after-free (bnc#1124728).
• CVE-2018-20669: Missing access control checks in ioctl of gpu/drm/i915 driver were fixed which might have lead to information leaks. (bnc#1122971).

The following non-security bugs were fixed:

• 6lowpan: iphc: reset mac_header after decompress to fix panic (bsc#1051510).
• 9p: clear dangling pointers in p9stat_free (bsc#1051510).
• 9p locks: fix glock.client_id leak in do_lock (bsc#1051510).
• 9p/net: fix memory leak in p9_client_create (bsc#1051510).
• 9p/net: put a lower bound on msize (bsc#1051510).
• 9p: use inode->i_lock to protect i_size_write() under 32-bit (bsc#1051510).
• acpi/APEI: Clear GHES block_status before panic() (bsc#1051510).
• acpi/device_sysfs: Avoid OF modalias creation for removed device (bsc#1051510).
• acpi/nfit: Block function zero DSMs (bsc#1051510).
• acpi/nfit: Fix Address Range Scrub completion tracking (bsc#1124969).
• acpi/nfit: Fix bus command validation (bsc#1051510).
• acpi/nfit: Fix command-supported detection (bsc#1051510).
• acpi/nfit: Fix race accessing memdev in nfit_get_smbios_id() (bsc#1122662).
• acpi/nfit: Fix user-initiated ARS to be 'ARS-long' rather than 'ARS-short' (bsc#1124969).
• acpi/numa: Use correct type for printing addresses on i386-PAE (bsc#1051510).
• acpi/power: Skip duplicate power resource references in _PRx (bsc#1051510).
• acpi/video: Extend chassis-type detection with a 'Lunch Box' check (bsc#1051510).
• acpi/video: Refactor and fix dmi_is_desktop() (bsc#1051510).
• add 1 entry 2bcbd406715dca256912b9c5ae449c7968f15705
• Add delay-init quirk for Corsair K70 RGB keyboards (bsc#1087092).
• af_iucv: Move sockaddr length checks to before accessing sa_family in bind and connect handlers (bsc#1051510).
• alsa: bebob: fix model-id of unit for Apogee Ensemble (bsc#1051510).
• alsa: bebob: use more identical mod_alias for Saffire Pro 10 I/O against Liquid Saffire 56 (bsc#1051510).
• alsa: compress: Fix stop handling on compressed capture streams (bsc#1051510).
• alsa: compress: prevent potential divide by zero bugs (bsc#1051510).
• alsa: firewire-motu: fix…

USN-3930-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.10. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 18.10 for Ubuntu 18.04 LTS.

Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2018-19824)

Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an information leak in the Bluetooth implementation of the Linux kernel. An attacker within Bluetooth range could use this to expose sensitive information (kernel memory). (CVE-2019-3459, CVE-2019-3460)

Jann Horn discovered that the KVM implementation in the Linux kernel contained a use-after-free vulnerability. An attacker in a guest VM with access to /dev/kvm could use this to cause a denial of service (guest VM crash). (CVE-2019-6974)

Jim Mattson and Felix Wilhelm discovered a use-after-free vulnerability in the KVM subsystem of the Linux kernel, when using nested virtual machines. A local attacker in a guest VM could use this to cause a denial of service (system crash) or possibly execute arbitrary code in the host system. (CVE-2019-7221)

Felix Wilhelm discovered that an information leak vulnerability existed in the KVM subsystem of the Linux kernel, when nested virtualization is used. A local attacker could use this to expose sensitive information (host system memory to a guest VM). (CVE-2019-7222)

Jann Horn discovered that the eBPF implementation in the Linux kernel was insufficiently hardened against Spectre V1 attacks. A local attacker could use this to expose sensitive information. (CVE-2019-7308)

It was discovered that a use-after-free vulnerability existed in the user- space API for crypto (af_alg) implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-8912)

Jakub Jirasek discovered a use-after-free vulnerability in the SCTP implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-8956)

It was discovered that the Linux kernel did not properly deallocate memory when handling certain errors while reading files. A local attacker could use this to cause a denial of service (excessive memory consumption). (CVE-2019-8980)

It was discovered that a use-after-free vulnerability existed in the IPMI implementation in the Linux kernel. A local attacker with access to the IPMI character device files could use this to cause a denial of service (system crash). (CVE-2019-9003)

Jann Horn discovered that the SNMP NAT implementation in the Linux kernel performed insufficient ASN.1 length checks. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-9162)

Jann Horn discovered that the mmap implementation in the Linux kernel did not properly check for the mmap minimum address in some situations. A local attacker could use this to assist exploiting a kernel NULL pointer dereference vulnerability. (CVE-2019-9213)

M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not properly set up all arguments to an error handler callback used when running as a paravirtualized guest. An unprivileged attacker in a paravirtualized guest VM could use this to cause a denial of service (guest VM crash). (CVE-2018-14678)

It was discovered that the KVM implementation in the Linux kernel on ARM 64bit processors did not properly handle some ioctls. An attacker with the privilege to create KVM-based virtual machines could use this to cause a denial of service (host system crash) or execute arbitrary code in the host. (CVE-2018-18021)

Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2018-19824)

Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an information leak in the Bluetooth implementation of the Linux kernel. An attacker within Bluetooth range could use this to expose sensitive information (kernel memory). (CVE-2019-3459, CVE-2019-3460)

Jann Horn discovered that the KVM implementation in the Linux kernel contained a use-after-free vulnerability. An attacker in a guest VM with access to /dev/kvm could use this to cause a denial of service (guest VM crash). (CVE-2019-6974)

Jim Mattson and Felix Wilhelm discovered a use-after-free vulnerability in the KVM subsystem of the Linux kernel, when using nested virtual machines. A local attacker in a guest VM could use this to cause a denial of service (system crash) or possibly execute arbitrary code in the host system. (CVE-2019-7221)

Felix Wilhelm discovered that an information leak vulnerability existed in the KVM subsystem of the Linux kernel, when nested virtualization is used. A local attacker could use this to expose sensitive information (host system memory to a guest VM). (CVE-2019-7222)

Jann Horn discovered that the eBPF implementation in the Linux kernel was insufficiently hardened against Spectre V1 attacks. A local attacker could use this to expose sensitive information. (CVE-2019-7308)

It was discovered that a use-after-free vulnerability existed in the user- space API for crypto (af_alg) implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-8912)

It was discovered that the Linux kernel did not properly deallocate memory when handling certain errors while reading files. A local attacker could use this to cause a denial of service (excessive memory consumption). (CVE-2019-8980)

Jann Horn discovered that the mmap implementation in the Linux kernel did not properly check for the mmap minimum address in some situations. A local attacker could use this to assist exploiting a kernel NULL pointer dereference vulnerability. (CVE-2019-9213)

USN-3931-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS and for the Linux Azure kernel for Ubuntu 14.04 LTS.

M. Vefa Bicakci and Andy Lutomirski discovered that the kernel did not properly set up all arguments to an error handler callback used when running as a paravirtualized guest. An unprivileged attacker in a paravirtualized guest VM could use this to cause a denial of service (guest VM crash). (CVE-2018-14678)

It was discovered that the KVM implementation in the Linux kernel on ARM 64bit processors did not properly handle some ioctls. An attacker with the privilege to create KVM-based virtual machines could use this to cause a denial of service (host system crash) or execute arbitrary code in the host. (CVE-2018-18021)

Mathias Payer and Hui Peng discovered a use-after-free vulnerability in the Advanced Linux Sound Architecture (ALSA) subsystem. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2018-19824)

Shlomi Oberman, Yuli Shapiro, and Ran Menscher discovered an information leak in the Bluetooth implementation of the Linux kernel. An attacker within Bluetooth range could use this to expose sensitive information (kernel memory). (CVE-2019-3459, CVE-2019-3460)

Jann Horn discovered that the KVM implementation in the Linux kernel contained a use-after-free vulnerability. An attacker in a guest VM with access to /dev/kvm could use this to cause a denial of service (guest VM crash). (CVE-2019-6974)

Jim Mattson and Felix Wilhelm discovered a use-after-free vulnerability in the KVM subsystem of the Linux kernel, when using nested virtual machines. A local attacker in a guest VM could use this to cause a denial of service (system crash) or possibly execute arbitrary code in the host system. (CVE-2019-7221)

Felix Wilhelm discovered that an information leak vulnerability existed in the KVM subsystem of the Linux kernel, when nested virtualization is used. A local attacker could use this to expose sensitive information (host system memory to a guest VM). (CVE-2019-7222)

Jann Horn discovered that the eBPF implementation in the Linux kernel was insufficiently hardened against Spectre V1 attacks. A local attacker could use this to expose sensitive information. (CVE-2019-7308)

It was discovered that a use-after-free vulnerability existed in the user- space API for crypto (af_alg) implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-8912)

It was discovered that the Linux kernel did not properly deallocate memory when handling certain errors while reading files. A local attacker could use this to cause a denial of service (excessive memory consumption). (CVE-2019-8980)

Jann Horn discovered that the mmap implementation in the Linux kernel did not properly check for the mmap minimum address in some situations. A local attacker could use this to assist exploiting a kernel NULL pointer dereference vulnerability. (CVE-2019-9213)