Vulnerability in Red Hat Enterprise Linux 10

[ Description ]Official description

A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen length — past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.

[ 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-Bund30 Sep 2026WID-SEC-2026-3676

  RPM: Vulnerability allows code execution Translated from German

  CVE-2026-103242

[ References ]References

• access.redhat.com/security/cve/CVE-2026-103242
• bugzilla.redhat.com/show_bug.cgi