CVE-2011-2898

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-05-24 · updated 2026-06-16
Weakness: CWE-200

Description

net/packet/af_packet.c in the Linux kernel before 2.6.39.3 does not properly restrict user-space access to certain packet data structures associated with VLAN Tag Control Information, which allows local users to obtain potentially sensitive information via a crafted application.

Affected products

Linux kernel: before 2.6.39.3 — fixed in 2.6.39.3

How to fix

Upgrade to a fixed version: Linux kernel 2.6.39.3. Check the vendor advisory for mitigations.

References

http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.3
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=13fcb7bd322164c67926ffe272846d4860196dc6
http://www.openwall.com/lists/oss-security/2011/08/03/7
https://bugzilla.redhat.com/show_bug.cgi?id=728023
https://github.com/torvalds/linux/commit/13fcb7bd322164c67926ffe272846d4860196dc6
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.3
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=13fcb7bd322164c67926ffe272846d4860196dc6
http://www.openwall.com/lists/oss-security/2011/08/03/7
https://bugzilla.redhat.com/show_bug.cgi?id=728023
https://github.com/torvalds/linux/commit/13fcb7bd322164c67926ffe272846d4860196dc6

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