What’s Vulnerable › Vulnerabilities

CVE-2010-4805

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2011-05-26 · updated 2026-06-16
• Weakness: CWE-400

Description

The socket implementation in net/core/sock.c in the Linux kernel before 2.6.35 does not properly manage a backlog of received packets, which allows remote attackers to cause a denial of service by sending a large amount of network traffic, related to the sk_add_backlog function and the sk_rmem_alloc socket field. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4251.

Affected products

• Linux kernel: before 2.6.35 — fixed in 2.6.35
• Red Hat Enterprise Linux: 4.0

How to fix

Upgrade to a fixed version: Linux kernel 2.6.35. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c377411f2494a931ff7facdbb3a6839b1266bcf6
• http://kerneltrap.org/mailarchive/linux-netdev/2010/3/3/6271093/thread
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
• http://www.securityfocus.com/bid/46637
• https://bugzilla.redhat.com/show_bug.cgi?id=657303
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c377411f2494a931ff7facdbb3a6839b1266bcf6
• http://kerneltrap.org/mailarchive/linux-netdev/2010/3/3/6271093/thread
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
• http://www.securityfocus.com/bid/46637
• https://bugzilla.redhat.com/show_bug.cgi?id=657303

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