Vulnerability in The GNU C Library glibc

[ Description ]Official description

The strncasecmp function in the GNU C Library 2.24 and later optimized for the Power8 architecture may read one byte beyond the input size limit, which may crash a program when that byte is not readable. This condition may happen when the input strings to the strncasecmp function are attacker controlled in an application and they match all the way up to the edge of their page and the neighbouring page is either not mapped or is not readable.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund28 Sep 2026WID-SEC-2026-3618

  GNU libc: Vulnerability allows denial of service Translated from German

  CVE-2026-97399

[ References ]References

• sourceware.org/bugzilla/show_bug.cgi
• sourceware.org/git
• www.openwall.com/lists/oss-security/2026/09/28/7