Synopsis

Important: kernel security update

Type/Severity

Security Advisory: Important

Topic

An update for kernel is now available for Red Hat Enterprise Linux 5.6 Long
Life.

Red Hat Product Security has rated this update as having a security impact of
Important. A Common Vulnerability Scoring System (CVSS) base score, which gives
a detailed severity rating, is available for each vulnerability from the CVE
link(s) in the References section.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating
system.

Security Fix(es):

• A race condition was found in the way the Linux kernel's memory subsystem
  handled the copy-on-write (COW) breakage of private read-only memory mappings.
  An unprivileged, local user could use this flaw to gain write access to
  otherwise read-only memory mappings and thus increase their privileges on the
  system. (CVE-2016-5195, Important)
  

Red Hat would like to thank Phil Oester for reporting this issue.

Solution

For details on how to apply this update, which includes the changes described in
this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux Server - AUS 5.6 x86_64
• Red Hat Enterprise Linux Server - AUS 5.6 ia64
• Red Hat Enterprise Linux Server - AUS 5.6 i386

Fixes

• BZ - 1384344 - CVE-2016-5195 kernel: mm: privilege escalation via MAP_PRIVATE COW breakage

CVEs

• CVE-2016-5195

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/security/vulnerabilities/2706661

Red Hat Enterprise Linux Server - AUS 5.6

SRPM
kernel-2.6.18-238.57.1.el5.src.rpm	SHA-256: 8b40aed3fbcfe8201aaaa138fd9e4893a4ff33daa1f7a893b63efa3732d42d34
x86_64
kernel-2.6.18-238.57.1.el5.x86_64.rpm	SHA-256: 81961c1287b7fb9a5ffca7f1689d6a999dc7cecbd8b7b069a9bc87bdf514dc75
kernel-debug-2.6.18-238.57.1.el5.x86_64.rpm	SHA-256: c635307d6ec0e11721b4fad260da9a8cf65dba5c9c4eaf57c91a4864ddec6d94
kernel-debug-debuginfo-2.6.18-238.57.1.el5.x86_64.rpm	SHA-256: 3fe03d7d611f5fb0d1da33f8b058bc7d971c4775c15045fc848a879ebf34060a
kernel-debug-devel-2.6.18-238.57.1.el5.x86_64.rpm	SHA-256: 45542a3a92a1fee2fb3d5c34ca6616985fdde22de2f36017814f9485fa7079ae
kernel-debuginfo-2.6.18-238.57.1.el5.x86_64.rpm	SHA-256: 7901bbd319ecc7aaf5f3439dcf728d9373961853c80deaef92d6e84e6951ca03
kernel-debuginfo-common-2.6.18-238.57.1.el5.x86_64.rpm	SHA-256: 96035662b221eec79868354cf7daf7ede34a974d611528c4f1ad32e1978fa478
kernel-devel-2.6.18-238.57.1.el5.x86_64.rpm	SHA-256: f3667472bb31819d57e1dd60d3fe77e8f429ae596c6623a94fdf4d16c8935dd2
kernel-doc-2.6.18-238.57.1.el5.noarch.rpm	SHA-256: ef4113cf29cabb5be1e6fce0b44247422b3082e02a88f6be9b37e21566baba66
kernel-headers-2.6.18-238.57.1.el5.x86_64.rpm	SHA-256: 05aaa55cb8e9ca11a65eca7feb9fafe5527600e3a285ba9762ea5082d133eb4b
kernel-xen-2.6.18-238.57.1.el5.x86_64.rpm	SHA-256: 3f52c75d7c912035ad648057cf35a28f6c5fa4ae501bdbc1f7cf19220b0dab25
kernel-xen-debuginfo-2.6.18-238.57.1.el5.x86_64.rpm	SHA-256: 60148acb359350a5dc0baed8875cb5fc90762ecdaf0a795b6ed7de1302bfe07f
kernel-xen-devel-2.6.18-238.57.1.el5.x86_64.rpm	SHA-256: f2f6a9fc8921e5584874ef3dce15493aa21ad4ed2c584034c723b76d4a720832
ia64
kernel-2.6.18-238.57.1.el5.ia64.rpm	SHA-256: a70ce437d801d294abd92f09ddc7c89948c1bf592f66a0082f196b41fe15ce51
kernel-debug-2.6.18-238.57.1.el5.ia64.rpm	SHA-256: 3540962f59a7f5235f1c123154b4645d709a5a954d6350614080f7288cf213e1
kernel-debug-debuginfo-2.6.18-238.57.1.el5.ia64.rpm	SHA-256: 3a3543bbf53308b57a17db57927579aaa686fbaaba11127817d70ca7e9eecfd7
kernel-debug-devel-2.6.18-238.57.1.el5.ia64.rpm	SHA-256: 59e870ead61f16d57a199089049c0938d4d8ba8715d0a84ffe294fd98d22acae
kernel-debuginfo-2.6.18-238.57.1.el5.ia64.rpm	SHA-256: 8c1d95f51b8ec29b188fd24f256742cca31cc047fdc6d70188ad87e6b3ba4059
kernel-debuginfo-common-2.6.18-238.57.1.el5.ia64.rpm	SHA-256: 75a30f02132a975781c0a2b19e7963481499c55ccad180688d9c33eb9950e0e9
kernel-devel-2.6.18-238.57.1.el5.ia64.rpm	SHA-256: b39c0182a59aeab4daa10c9a8c240484e395b4b3c6b877e5f98108c8a310cc4d
kernel-doc-2.6.18-238.57.1.el5.noarch.rpm	SHA-256: ef4113cf29cabb5be1e6fce0b44247422b3082e02a88f6be9b37e21566baba66
kernel-headers-2.6.18-238.57.1.el5.ia64.rpm	SHA-256: 16456aab0be148e405d424acdd5722b2fe3bdf9c0fd313839e2ce8dbd789604c
kernel-xen-2.6.18-238.57.1.el5.ia64.rpm	SHA-256: 36312ef497b71ea52800fa1a584fd40a80bb8ad3a4c54a79f66316f1215ba4a6
kernel-xen-debuginfo-2.6.18-238.57.1.el5.ia64.rpm	SHA-256: b3f622c1f97212002b9ece98a6477e356d3a2e119f076c5cfe3b8f6fc3cdb8d4
kernel-xen-devel-2.6.18-238.57.1.el5.ia64.rpm	SHA-256: 0f5f7cc5225df08991f3d9e843227daae6088464e128860fd33dd0d4fa5c6a2f
i386
kernel-2.6.18-238.57.1.el5.i686.rpm	SHA-256: eb9ad2b23d9d6db4e6d84688f4027823435a6bbfe2d844e54b7b3d8d0cef5be8
kernel-PAE-2.6.18-238.57.1.el5.i686.rpm	SHA-256: 12316574fc2cd47d36823b61b4aa193679ace3b8bc7dbc5154a238d81f41f751
kernel-PAE-debuginfo-2.6.18-238.57.1.el5.i686.rpm	SHA-256: 9e0988c27991fde87017a4e3404bf58235d948128ddefad5450e5c0163496312
kernel-PAE-devel-2.6.18-238.57.1.el5.i686.rpm	SHA-256: ab288a91f3775d2a23cd3d22ae9de550b06cefd940955b480ffc98746056eb44
kernel-debug-2.6.18-238.57.1.el5.i686.rpm	SHA-256: 6d4f5a6ad7671b7f1786504396daf0f66387fc2d56b1075ec8fd81ee3693536a
kernel-debug-debuginfo-2.6.18-238.57.1.el5.i686.rpm	SHA-256: 5cf6e82ea205c080df50b77122a52bfcfb9d17263f9a0f7c77758ee185272824
kernel-debug-devel-2.6.18-238.57.1.el5.i686.rpm	SHA-256: 1565243db5b9d2b4f067a1965c6eeb2832b99af6f9a6ebc8b5b5dceb33cf18f4
kernel-debuginfo-2.6.18-238.57.1.el5.i686.rpm	SHA-256: d9ae9bb1f82cc15024ba3da2f978e4c4391359257a107e6fe2d39743d3ea32d1
kernel-debuginfo-common-2.6.18-238.57.1.el5.i686.rpm	SHA-256: b20b5203252a63b260277062fb9c0263b3d4bcc6068cf6396f149951e3a87f5f
kernel-devel-2.6.18-238.57.1.el5.i686.rpm	SHA-256: 9edd0c82dba0519aaf6ee5d65319942762cc8f422d62e651a8ab1362b6b438ad
kernel-doc-2.6.18-238.57.1.el5.noarch.rpm	SHA-256: ef4113cf29cabb5be1e6fce0b44247422b3082e02a88f6be9b37e21566baba66
kernel-headers-2.6.18-238.57.1.el5.i386.rpm	SHA-256: 3a0a6891305eebde674d9fe997ca77656f9de3215806ea567ce0e98e130460cf
kernel-xen-2.6.18-238.57.1.el5.i686.rpm	SHA-256: 6465c2c5d6daf31cfd5a8fb66ba79c1613c89273f05dc504af3087d0b94ba444
kernel-xen-debuginfo-2.6.18-238.57.1.el5.i686.rpm	SHA-256: c85b95eac40143382a8403c5f2ab3cafee5b017ca63885c257a1ee755dab4492
kernel-xen-devel-2.6.18-238.57.1.el5.i686.rpm	SHA-256: a111e8d8884aacd47f9c68f2b07c34ebffa3ef71669a4f9def362f4bb626a3e2