medium
6.9
CWE
362
Advisory Published
CVE Published
Updated

CVE-2014-9529: Race Condition

First published: Wed Jan 07 2015(Updated: )

It was reported [1] that the Linux kernel suffered from a flaw when doing key garbage collection. The patch [1] describes the issue as: """ When a key is being garbage collected, it's key-&gt;user would get put before the -&gt;destroy() callback is called, where the key is removed from it's respective tracking structures. This leaves a key hanging in a semi-invalid state which leaves a window open for a different task to try an access key-&gt;user. An example is find_keyring_by_name() which would dereference key-&gt;user for a key that is in the process of being garbage collected (where key-&gt;user was freed but -&gt;destroy() wasn't called yet - so it's still present in the linked list). """ An unprivileged local user could use this flaw to crash the system. [1] <a href="http://marc.info/?l=linux-kernel&amp;m=141986398232547&amp;w=2">http://marc.info/?l=linux-kernel&amp;m=141986398232547&amp;w=2</a>

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<3.2.67
Linux Linux kernel>=3.3<3.4.107
Linux Linux kernel>=3.5<3.10.67
Linux Linux kernel>=3.11<=3.12.37
Linux Linux kernel>=3.13<=3.14.31
Linux Linux kernel>=3.15<3.16.35
Linux Linux kernel>=3.17<3.18.5
Redhat Enterprise Linux Desktop=6.0
Redhat Enterprise Linux Desktop=7.0
Redhat Enterprise Linux Server=6.0
Redhat Enterprise Linux Server=7.0
Redhat Enterprise Linux Server Aus=6.6
Redhat Enterprise Linux Server Aus=7.3
Redhat Enterprise Linux Server Aus=7.4
Redhat Enterprise Linux Server Aus=7.6
Redhat Enterprise Linux Server Aus=7.7
Redhat Enterprise Linux Server Eus=6.6
Redhat Enterprise Linux Server Eus=7.1
Redhat Enterprise Linux Server Eus=7.2
Redhat Enterprise Linux Server Eus=7.3
Redhat Enterprise Linux Server Eus=7.4
Redhat Enterprise Linux Server Eus=7.5
Redhat Enterprise Linux Server Eus=7.6
Redhat Enterprise Linux Server Eus=7.7
Redhat Enterprise Linux Server Tus=6.6
Redhat Enterprise Linux Server Tus=7.3
Redhat Enterprise Linux Server Tus=7.6
Redhat Enterprise Linux Server Tus=7.7
Redhat Enterprise Linux Workstation=6.0
Redhat Enterprise Linux Workstation=7.0
openSUSE openSUSE=13.1
Fedoraproject Fedora=20
Fedoraproject Fedora=21
Debian Debian Linux=7.0
Debian Debian Linux=8.0
Canonical Ubuntu Linux=10.04
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=14.10
Linux Linux kernel<=3.18.2
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.112-1
6.11.5-1
6.11.7-1

Remedy

http://www.openwall.com/lists/oss-security/2015/01/06/10

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1179813

Remedy

https://github.com/torvalds/linux/commit/a3a8784454692dd72e5d5d34dcdab17b4420e74c

Remedy

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a3a8784454692dd72e5d5d34dcdab17b4420e74c

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