CVE-2007-0257: Grsecurity Kernel Patch

High severity, CVSS 7.8. EPSS: 1% chance of exploitation in the next 30 days.

Unspecified vulnerability in the expand_stack function in grsecurity PaX allows local users to gain privileges via unspecified vectors. NOTE: the grsecurity developer has disputed this issue, stating that "the function they claim the vulnerability to be in is a trivial function, which can, and has been, easily checked for any supposed vulnerabilities." The developer also cites a past disclosure that was not proven. As of 20070120, the original researcher has released demonstration code

Affected products

• Grsecurity Grsecurity Kernel Patch: version 1.9.4 only; version 2.0.1 only; version 2.0.2 only; version 2.1.0 only; version 2.1.1 only; version 2.1.2 only; …

Published 2007-01-16. Last modified 2026-06-16.