What’s Vulnerable › Vulnerabilities

CVE-2011-2213

• Severity: medium (CVSS 4.9 v2.0)
• 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: 2011-08-29 · updated 2026-06-16
• Weakness: CWE-835

Description

The inet_diag_bc_audit function in net/ipv4/inet_diag.c in the Linux kernel before 2.6.39.3 does not properly audit INET_DIAG bytecode, which allows local users to cause a denial of service (kernel infinite loop) via crafted INET_DIAG_REQ_BYTECODE instructions in a netlink message, as demonstrated by an INET_DIAG_BC_JMP instruction with a zero yes value, a different vulnerability than CVE-2010-3880.

Affected products

• Linux kernel: before 2.6.39.3 — fixed in 2.6.39.3
• RedHat Enterprise Linux Aus: 5.6
• RedHat Enterprise Linux Desktop: 5.0
• RedHat Enterprise Linux Eus: 5.6
• RedHat Enterprise Linux Server: 5.0
• RedHat Enterprise Linux Workstation: 5.0

How to fix

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

References

• http://article.gmane.org/gmane.linux.network/197206
• http://article.gmane.org/gmane.linux.network/197208
• http://article.gmane.org/gmane.linux.network/197386
• http://article.gmane.org/gmane.linux.network/198809
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=eeb1497277d6b1a0a34ed36b97e18f2bd7d6de0d
• http://marc.info/?l=bugtraq&m=139447903326211&w=2
• http://patchwork.ozlabs.org/patch/100857/
• http://rhn.redhat.com/errata/RHSA-2011-0927.html
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.3
• http://www.openwall.com/lists/oss-security/2011/06/20/1
• http://www.openwall.com/lists/oss-security/2011/06/20/13
• http://www.openwall.com/lists/oss-security/2011/06/20/16

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