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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 5.0 | linux-2.6 | 2.6.26-26lenny1 | DSA-2126-1 |
Advisories 1
- DSA-2126-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
References
- [oss-security] 20101111 CVE request: kernel: remote DoS in X.25 mailing-list
- SUSE-SA:2011:004 vendor-advisory
- 42778 third-party-advisory
- 42801 third-party-advisory
- SUSE-SA:2011:002 vendor-advisory
- SUSE-SA:2011:001 vendor-advisory
- 42932 third-party-advisory
- ADV-2011-0124 vdb-entry
- SUSE-SA:2011:007 vendor-advisory
- SUSE-SA:2010:060 vendor-advisory
- ADV-2011-0298 vdb-entry
- [oss-security] 20101112 Re: CVE request: kernel: remote DoS in X.25 mailing-list
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
- 45055 vdb-entry
- ADV-2011-0375 vdb-entry
- ADV-2011-0012 vdb-entry
- SUSE-SA:2011:008 vendor-advisory
- MDVSA-2011:029 vendor-advisory
- 43291 third-party-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5ef41308f94dcbb3b7afc56cdef1c2ba53fa5d2f
- [netdev] 20101111 [SECURITY] [PATCH] Prevent crashing when parsing bad X.25 mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=652517
- DSA-2126 vendor-advisory