CVE-2016-0774

The (1) pipe_read and (2) pipe_write implementations in fs/pipe.c in a certain Linux kernel backport in the linux package before 3.2.73-2+deb7u3 on Debian wheezy and the kernel package before 3.10.0-229.26.2 on Red Hat Enterprise Linux (RHEL) 7.1 do not properly consider the side effects of failed __copy_to_user_inatomic and __copy_from_user_inatomic calls, which allows local users to cause a denial of service (system crash) or possibly gain privileges via a crafted application, aka an "I/O vector array overrun." NOTE: this vulnerability exists because of an incorrect fix for CVE-2015-1805.

The SUSE Linux Enterprise 12 kernel was updated to 3.12.55 to receive various security and bugfixes.

Features added:

• A improved XEN blkfront module was added, which allows more I/O bandwidth. (FATE#320625) It is called xen-blkfront in PV, and xen-vbd-upstream in HVM mode.

The following security bugs were fixed:

• CVE-2013-7446: Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel allowed local users to bypass intended AF_UNIX socket permissions or cause a denial of service (panic) via crafted epoll_ctl calls (bnc#955654).
• CVE-2015-5707: Integer overflow in the sg_start_req function in drivers/scsi/sg.c in the Linux kernel allowed local users to cause a denial of service or possibly have unspecified other impact via a large iov_count value in a write request (bnc#940338).
• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here' (bnc#959709 bnc#960561).
• CVE-2015-8767: net/sctp/sm_sideeffect.c in the Linux kernel did not properly manage the relationship between a lock and a socket, which allowed local users to cause a denial of service (deadlock) via a crafted sctp_accept call (bnc#961509).
• CVE-2015-8785: The fuse_fill_write_pages function in fs/fuse/file.c in the Linux kernel allowed local users to cause a denial of service (infinite loop) via a writev system call that triggers a zero length for the first segment of an iov (bnc#963765).
• CVE-2015-8812: A use-after-free flaw was found in the CXGB3 kernel driver when the network was considered to be congested. This could be used by local attackers to cause machine crashes or potentially code executuon (bsc#966437).
• CVE-2016-0723: Race condition in the tty_ioctl function in drivers/tty/tty_io.c in the Linux kernel allowed local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free and system crash) by making a TIOCGETD ioctl call during processing of a TIOCSETD ioctl call (bnc#961500).
• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964730).
• CVE-2016-2069: Race conditions in TLB syncing was fixed which could leak to information leaks (bnc#963767).
• CVE-2016-2384: A double-free triggered by invalid USB descriptor in ALSA usb-audio was fixed, which could be exploited by physical local attackers to crash the kernel or gain code execution (bnc#966693).

The following non-security bugs were fixed:

• alsa: rawmidi: Make snd_rawmidi_transmit() race-free (bsc#968018).
• alsa: seq: Fix leak of pool buffer at concurrent writes (bsc#968018).
• be2net: fix some log messages (bnc#855062 FATE#315961, bnc#867583).
• block: xen-blkfront: Fix possible NULL ptr dereference (bsc#957986 fate#320625).
• btrfs: Add handler for invalidate page (bsc#963193).
• btrfs: check prepare_uptodate_page() error code earlier (bnc#966910).
• btrfs: delayed_ref: Add new function to record reserved space into delayed ref (bsc#963193).
• btrfs: delayed_ref: release and free qgroup reserved at proper timing (bsc#963193).
• btrfs: extent_io: Introduce needed structure for recoding set/clear bits (bsc#963193).
• btrfs: extent_io: Introduce new function clear_record_extent_bits() (bsc#963193).
• btrfs: extent_io: Introduce new function set_record_extent_bits (bsc#963193).
• btrfs: extent-tree: Add new version of btrfs_check_data_free_space and btrfs_free_reserved_data_space (bsc#963193).
• btrfs: extent-tree: Add new version of btrfs_delalloc_reserve/release_space (bsc#963193).
• btrfs: extent-tree: Switch to new check_data_free_space and free_reserved_data_space (bsc#963193).
• btrfs: extent-tree: Switch to new delalloc space reserve and release…

This update for the Linux Kernel 3.12.49-11.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.51-60.20.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.53-60.30.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.51-52.39.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.51-60.25.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.44-52.18.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.44-52.10.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.51-52.31.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.39-47.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.48-52.27.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.51-52.34.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

This update for the Linux Kernel 3.12.43-52.6.1 fixes the following issues:

• CVE-2016-2384: A malicious USB device could cause a kernel crash in the alsa usb-audio driver. (bsc#967773)

• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb's queued, these structures would be referenced and may panic the system or allow an attacker to escalate privileges in a use-after-free scenario. (bsc#966683)

• CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed (bsc#964732).

• CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states 'there is no kernel bug here.' (bsc#960563)

Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the Linux kernel did not properly validate the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7515)

Ben Hawkes discovered that the Linux kernel's AIO interface allowed single writes greater than 2GB, which could cause an integer overflow when writing to certain filesystems, socket or device types. A local attacker could this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2015-8830)

It was discovered that the Linux kernel did not keep accurate track of pipe buffer details when error conditions occurred, due to an incomplete fix for CVE-2015-1805. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-0774)

Zach Riggle discovered that the Linux kernel's list poison feature did not take into account the mmap_min_addr value. A local attacker could use this to bypass the kernel's poison-pointer protection mechanism while attempting to exploit an existing kernel vulnerability. (CVE-2016-0821)

Ralf Spenneberg discovered that the USB sound subsystem in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-2184)

Ralf Spenneberg discovered that the ATI Wonder Remote II USB driver in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-2185)

Ralf Spenneberg discovered that the PowerMate USB driver in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-2186)

Ralf Spenneberg discovered that the I/O-Warrior USB device driver in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-2188)

Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the MCT USB RS232 Converter device driver in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-3136)

Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the Cypress M8 USB device driver in the Linux kernel did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-3137)

Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the USB abstract device control driver for modems and ISDN adapters did not validate endpoint descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-3138)

Sergej Schumilo, Hendrik Schwartke, and Ralf Spenneberg discovered that the Linux kernel's USB driver for Digi AccelePort serial converters did not properly validate USB device descriptors. An attacker with physical access could use this to cause a denial of service (system crash). (CVE-2016-3140)

It was discovered that the IPv4 implementation in the Linux kernel did not perform the destruction of inet device objects properly. An attacker in a guest OS could use this to cause a denial of service (networking outage) in the host OS. (CVE-2016-3156)

Andy Lutomirski discovered that the Linux kernel did not properly context- switch IOPL on 64-bit PV Xen guests. An attacker in a guest OS could use this to cause a denial of service (guest OS crash), gain privileges, or obtain sensitive information. (CVE-2016-3157)

It was discovered that the Linux kernel's USB driver for IMS Passenger Control Unit devices did not properly validate the device's interfaces. An…