Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2009-4537     Fabian Yamaguchi reported a missing check for Ethernet     frames larger than the MTU in the r8169 driver. This may     allow users on the local network to crash a system,     resulting in a denial of service.

  - CVE-2010-0727     Sachin Prabhu reported an issue in the GFS2 filesystem.
    Local users can trigger a BUG() altering the permissions     on a locked file, resulting in a denial of service.

  - CVE-2010-1083     Linus Torvalds reported an issue in the USB subsystem,     which may allow local users to obtain portions of     sensitive kernel memory.

  - CVE-2010-1084     Neil Brown reported an issue in the Bluetooth subsystem     that may permit remote attackers to overwrite memory     through the creation of large numbers of sockets,     resulting in a denial of service.

  - CVE-2010-1086     Ang Way Chuang reported an issue in the DVB subsystem     for Digital TV adapters. By creating a specially-encoded     MPEG2-TS frame, a remote attacker could cause the     receiver to enter an endless loop, resulting in a denial     of service.

  - CVE-2010-1087     Trond Myklebust reported an issue in the NFS filesystem.
    A local user may cause an oops by sending a fatal signal     during a file truncation operation, resulting in a     denial of service.

  - CVE-2010-1088     Al Viro reported an issue where automount symlinks may     not be followed when LOOKUP_FOLLOW is not set. This has     an unknown security impact.

  - CVE-2010-1162     Catalin Marinas reported an issue in the tty subsystem     that allows local attackers to cause a kernel memory     leak, possibly resulting in a denial of service.

  - CVE-2010-1173     Chris Guo from Nokia China and Jukka Taimisto and Olli     Jarva from Codenomicon Ltd reported an issue in the SCTP     subsystem that allows a remote attacker to cause a     denial of service using a malformed init package.

  - CVE-2010-1187     Neil Hormon reported an issue in the TIPC subsystem.
    Local users can cause a denial of service by way of a     NULL pointer dereference by sending datagrams through     AF_TIPC before entering network mode.

  - CVE-2010-1437     Toshiyuki Okajima reported a race condition in the     keyring subsystem. Local users can cause memory     corruption via keyctl commands that access a keyring in     the process of being deleted, resulting in a denial of     service.

  - CVE-2010-1446     Wufei reported an issue with kgdb on the PowerPC     architecture, allowing local users to write to kernel     memory. Note: this issue does not affect binary kernels     provided by Debian. The fix is provided for the benefit     of users who build their own kernels from Debian source.

  - CVE-2010-1451     Brad Spengler reported an issue on the SPARC     architecture that allows local users to execute     non-executable pages.

This update also includes fixes a regression introduced by a previous update. See the referenced Debian bug page for details.

The SUSE Linux Enterprise 11 Kernel was updated to 2.6.27.48 fixing various bugs and security issues.

CVE-2010-1641: The do_gfs2_set_flags function in fs/gfs2/file.c in the Linux kernel does not verify the ownership of a file, which allows local users to bypass intended access restrictions via a SETFLAGS ioctl request.

CVE-2010-1087: The nfs_wait_on_request function in fs/nfs/pagelist.c in the Linux kernel allows attackers to cause a denial of service (Oops) via unknown vectors related to truncating a file and an operation that is not interruptible. 

CVE-2010-1643: mm/shmem.c in the Linux kernel, when strict overcommit is enabled, does not properly handle the export of shmemfs objects by knfsd, which allows attackers to cause a denial of service (NULL pointer dereference and knfsd crash) or possibly have unspecified other impact via unknown vectors.

CVE-2010-1437: Race condition in the find_keyring_by_name function in security/keys/keyring.c in the Linux kernel allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact via keyctl session commands that trigger access to a dead keyring that is undergoing deletion by the key_cleanup function.

CVE-2010-1446: arch/powerpc/mm/fsl_booke_mmu.c in KGDB in the Linux kernel, when running on PowerPC, does not properly perform a security check for access to a kernel page, which allows local users to overwrite arbitrary kernel memory, related to Fsl booke.

CVE-2010-1162: The release_one_tty function in drivers/char/tty_io.c in the Linux kernel omits certain required calls to the put_pid function, which has unspecified impact and local attack vectors.

CVE-2009-4537: drivers/net/r8169.c in the r8169 driver in the Linux kernel does not properly check the size of an Ethernet frame that exceeds the MTU, which allows remote attackers to (1) cause a denial of service (temporary network outage) via a packet with a crafted size, in conjunction with certain packets containing A characters and certain packets containing E characters; or (2) cause a denial of service (system crash) via a packet with a crafted size, in conjunction with certain packets containing '\0' characters, related to the value of the status register and erroneous behavior associated with the RxMaxSize register. NOTE: this vulnerability exists because of an incorrect fix for CVE-2009-1389.

The SUSE Linux Enterprise 11 kernel was updated to 2.6.27.48, fixing various bugs and security issues :

  - The do_gfs2_set_flags() function in fs/gfs2/file.c of     the Linux kernel does not verify the ownership of a     file, which allows local users to bypass intended access     restrictions via a SETFLAGS ioctl request.
    (CVE-2010-1641)

  - The nfs_wait_on_request() function in fs/nfs/pagelist.c     of the Linux kernel allows attackers to cause a denial     of service (Oops) via unknown vectors related to     truncating a file and an operation that is not     interruptible. (CVE-2010-1087)

  - When strict overcommit is enabled, mm/shmem.c does not     properly handle the export of shmemfs objects by knfsd,     which allows attackers to cause a denial of service     (NULL pointer dereference and knfsd crash) or possibly     have unspecified other impact via unknown vectors.
    (CVE-2010-1643)

  - A race condition in the find_keyring_by_name() function     in security/keys/keyring.c of the Linux kernel allows     local users to cause a denial of service (memory     corruption and system crash) or possibly have     unspecified other impact via keyctl session commands     that trigger access to a dead keyring that is undergoing     deletion by the key_cleanup() function. (CVE-2010-1437)

  - arch/1/mm/fsl_booke_mmu.c in KGDB in the Linux kernel,     when running on PowerPC, does not properly perform a     security check for access to a kernel page, which allows     local users to overwrite arbitrary kernel memory.
    (CVE-2010-1446)

  - The release_one_tty() function in drivers/char/tty_io.c     of the Linux kernel omits certain required calls to the     put_pid() function, which has an unspecified impact and     local attack vectors. (CVE-2010-1162)

  - The r8169 driver of the Linux kernel does not properly     check the size of an Ethernet frame that exceeds the     MTU, which allows remote attackers to cause a denial of     service (temporary network outage) via a packet with a     crafted size, in conjunction with certain packets     containing A characters and certain packets containing E     characters; or cause a denial of service (system crash)     via a packet with a crafted size, in conjunction with     certain packets containing '0' characters, related to     the value of the status register and erroneous behavior     associated with the RxMaxSize register. This     vulnerability exists due to an incorrect fix for     CVE-2009-1389. (CVE-2009-4537)

For a list of non-security related fixes please refer to the kernel RPM changelog.

ID	Name	Product	Family	Published	Updated	Severity
46725	Debian DSA-2053-1 : linux-2.6 - privilege escalation/denial of service/information leak	Nessus	Debian Local Security Checks	5/26/2010	1/4/2021	high
47774	openSUSE Security Update : kernel (openSUSE-SU-2010:0397-1)	Nessus	SuSE Local Security Checks	7/21/2010	1/14/2021	high
50922	SuSE 11 Security Update : Linux kernel (SAT Patch Numbers 2682 / 2687 / 2689)	Nessus	SuSE Local Security Checks	12/2/2010	1/14/2021	high

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