medium
5.5
Advisory Published
CVE Published
Updated

CVE-2016-4470

First published: Wed Jun 01 2016(Updated: )

A local user can trigger a flaw in the Linux kernel's handling of key lookups in the keychain subsystem. The key_reject_and_link() function contains an error in which a key-lookup can fail and in an attempt to cache the failed lookup may attempt to free memory which can still be in use. This could crash the system or at worse free a memory block which would then be re-used by another kernel mechanism causing a user after free. Product bug: <a class="bz_bug_link bz_secure " title="" href="show_bug.cgi?id=1341352">https://bugzilla.redhat.com/show_bug.cgi?id=1341352</a> Upstream patch: <a href="https://www.spinics.net/lists/linux-kernel-janitors/msg26069.html">https://www.spinics.net/lists/linux-kernel-janitors/msg26069.html</a>

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Oracle VM Server=3.3
Oracle VM Server=3.4
Oracle Linux=5.0
Oracle Linux=6
Oracle Linux=7
Linux Linux kernel<=4.6.3
Novell Suse Linux Enterprise Real Time Extension=12.0-sp1
Redhat Enterprise Linux=6.0
Redhat Enterprise Linux Desktop=7.0
Redhat Enterprise Linux For Real Time=7.0
Redhat Enterprise Linux Hpc Node=7.0
Redhat Enterprise Linux Hpc Node Eus=7.0
Redhat Enterprise Linux Server=7.0
Redhat Enterprise Linux Server Aus=7.2
Redhat Enterprise Linux Server Eus=7.2
Redhat Enterprise Linux Workstation=7.0
Redhat Enterprise Mrg=2.0
debian/linux
5.10.223-1
5.10.226-1
6.1.106-3
6.1.112-1
6.11.4-1
6.11.5-1

Remedy

https://git.kernel.org/linus/f70e2e06196ad4c1c762037da2f75354f6c16b81

Remedy

https://git.kernel.org/linus/38327424b40bcebe2de92d07312c89360ac9229a

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2016-4470.

  • What is the severity of CVE-2016-4470?

    The severity of CVE-2016-4470 is high with a severity value of 7.

  • How does CVE-2016-4470 impact the Linux kernel?

    CVE-2016-4470 can cause a denial of service (system crash) in the Linux kernel.

  • Which Linux kernel versions are affected by CVE-2016-4470?

    Linux kernel versions through 4.6.3 are affected by CVE-2016-4470.

  • How can I fix CVE-2016-4470?

    To fix CVE-2016-4470, update your Linux kernel to version 4.7 or later.

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