Synopsis

Important: kernel security update

Type/Severity

Security Advisory: Important

Topic

An update for kernel is now available for Red Hat Enterprise Linux 6.5 Advanced Update Support and Red Hat Enterprise Linux 6.5 Telco Extended Update Support.

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 flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)
  

Red Hat would like to thank Alexander Popov 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 6.5 x86_64
• Red Hat Enterprise Linux Server - TUS 6.5 x86_64

Fixes

• BZ - 1428319 - CVE-2017-2636 kernel: Race condition access to n_hdlc.tbuf causes double free in n_hdlc_release()

CVEs

• CVE-2017-2636

References

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

Red Hat Enterprise Linux Server - AUS 6.5

SRPM
kernel-2.6.32-431.80.1.el6.src.rpm	SHA-256: 6f20efb8e853e4e1f76c9b0b78dd5784b6c5a9301281e6ecd33bde00e5d85ff6
x86_64
kernel-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 8688f0eb59cc18205218294ab5f3cc9c774496964cb312f4a7c677c6f0c5856e
kernel-abi-whitelists-2.6.32-431.80.1.el6.noarch.rpm	SHA-256: bcb89a9277c9f90dca4b29bf6b711723c929b1fcb4fba42fe7f48cf5b66f4404
kernel-debug-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: fb09d96b7cff4e95abf2108cdf557940abe61c708237302c4f73cd09c970d694
kernel-debug-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 91c877345ee6da135aec83f5d815c4e23101147cf55593c39d45176a2b4064df
kernel-debug-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 91c877345ee6da135aec83f5d815c4e23101147cf55593c39d45176a2b4064df
kernel-debug-devel-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 17aa9ce5d36a6a48db1f2e3038830e451c35d15ccf5eb7ee27b36cce7ab857d0
kernel-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 31fbe349ba3b29ed74ebbef158436f9e86ba7f43992825a702d95bede7444977
kernel-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 31fbe349ba3b29ed74ebbef158436f9e86ba7f43992825a702d95bede7444977
kernel-debuginfo-common-x86_64-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: bd2206ca48c9122cd9a256bf6473c3647662a4a572a9a099888a0fa5ce11fd7b
kernel-debuginfo-common-x86_64-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: bd2206ca48c9122cd9a256bf6473c3647662a4a572a9a099888a0fa5ce11fd7b
kernel-devel-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 384a23324ebc953902b427dc2363cf8b5d26630ba9d96abeab4141cb12d75c29
kernel-doc-2.6.32-431.80.1.el6.noarch.rpm	SHA-256: 64097d12462a6860e1788d97b1a6a35d4b48671e89d4b412ac812fdc93578a3a
kernel-firmware-2.6.32-431.80.1.el6.noarch.rpm	SHA-256: 1b4a6b1e7df664ef6c89345aa605fe06ff30589745443c5adbd0a435813997e7
kernel-headers-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 774e0d89d05a933c43aeaf47e22ca5f5e0e947a967807cf635496509a18e4031
perf-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: b4f9e604757f353134822a65fe5776481b2bd3955c764ef79f9483924af2c928
perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: d48439de1761400c4d15a4f4dded4564ec99854db2a58b994a62485727f83bd4
perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: d48439de1761400c4d15a4f4dded4564ec99854db2a58b994a62485727f83bd4
python-perf-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: ea68f5372913903823023fad5e332422a3a99ed221b5c4746ca4dedfa5ed8819
python-perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: ac72dd2b5e977ac77f35ed3d9cda4a57894e3417aced9294ed67250da138d236
python-perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: ac72dd2b5e977ac77f35ed3d9cda4a57894e3417aced9294ed67250da138d236

Red Hat Enterprise Linux Server - TUS 6.5

SRPM
kernel-2.6.32-431.80.1.el6.src.rpm	SHA-256: 6f20efb8e853e4e1f76c9b0b78dd5784b6c5a9301281e6ecd33bde00e5d85ff6
x86_64
kernel-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 8688f0eb59cc18205218294ab5f3cc9c774496964cb312f4a7c677c6f0c5856e
kernel-abi-whitelists-2.6.32-431.80.1.el6.noarch.rpm	SHA-256: bcb89a9277c9f90dca4b29bf6b711723c929b1fcb4fba42fe7f48cf5b66f4404
kernel-debug-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: fb09d96b7cff4e95abf2108cdf557940abe61c708237302c4f73cd09c970d694
kernel-debug-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 91c877345ee6da135aec83f5d815c4e23101147cf55593c39d45176a2b4064df
kernel-debug-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 91c877345ee6da135aec83f5d815c4e23101147cf55593c39d45176a2b4064df
kernel-debug-devel-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 17aa9ce5d36a6a48db1f2e3038830e451c35d15ccf5eb7ee27b36cce7ab857d0
kernel-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 31fbe349ba3b29ed74ebbef158436f9e86ba7f43992825a702d95bede7444977
kernel-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 31fbe349ba3b29ed74ebbef158436f9e86ba7f43992825a702d95bede7444977
kernel-debuginfo-common-x86_64-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: bd2206ca48c9122cd9a256bf6473c3647662a4a572a9a099888a0fa5ce11fd7b
kernel-debuginfo-common-x86_64-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: bd2206ca48c9122cd9a256bf6473c3647662a4a572a9a099888a0fa5ce11fd7b
kernel-devel-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 384a23324ebc953902b427dc2363cf8b5d26630ba9d96abeab4141cb12d75c29
kernel-doc-2.6.32-431.80.1.el6.noarch.rpm	SHA-256: 64097d12462a6860e1788d97b1a6a35d4b48671e89d4b412ac812fdc93578a3a
kernel-firmware-2.6.32-431.80.1.el6.noarch.rpm	SHA-256: 1b4a6b1e7df664ef6c89345aa605fe06ff30589745443c5adbd0a435813997e7
kernel-headers-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: 774e0d89d05a933c43aeaf47e22ca5f5e0e947a967807cf635496509a18e4031
perf-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: b4f9e604757f353134822a65fe5776481b2bd3955c764ef79f9483924af2c928
perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: d48439de1761400c4d15a4f4dded4564ec99854db2a58b994a62485727f83bd4
perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: d48439de1761400c4d15a4f4dded4564ec99854db2a58b994a62485727f83bd4
python-perf-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: ea68f5372913903823023fad5e332422a3a99ed221b5c4746ca4dedfa5ed8819
python-perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: ac72dd2b5e977ac77f35ed3d9cda4a57894e3417aced9294ed67250da138d236
python-perf-debuginfo-2.6.32-431.80.1.el6.x86_64.rpm	SHA-256: ac72dd2b5e977ac77f35ed3d9cda4a57894e3417aced9294ed67250da138d236