CVE-2007-5501

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2007-11-15 · updated 2026-06-16
Weakness: CWE-399

Description

The tcp_sacktag_write_queue function in net/ipv4/tcp_input.c in Linux kernel 2.6.21 through 2.6.23.7, and 2.6.24-rc through 2.6.24-rc2, allows remote attackers to cause a denial of service (crash) via crafted ACK responses that trigger a NULL pointer dereference.

Affected products

Linux kernel: 2.6.21, 2.6.21-rc1, 2.6.21-rc2, 2.6.21-rc3, 2.6.21-rc4, 2.6.21-rc5 (+58)

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=96a2d41a3e495734b63bff4e5dd0112741b93b38
http://lists.opensuse.org/opensuse-security-announce/2008-03/msg00002.html
http://lwn.net/Articles/258947/
http://secunia.com/advisories/27664
http://secunia.com/advisories/27703
http://secunia.com/advisories/27888
http://secunia.com/advisories/27919
http://secunia.com/advisories/27922
http://secunia.com/advisories/28170
http://secunia.com/advisories/28706
http://secunia.com/advisories/29245
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.8

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