Vulnerability in Red Hat Enterprise Linux 10

[ Description ]Official description

A flaw was found in GDB's STABS debug format parser. The read_member_functions() function in gdb/stabsread.c contains a linked list removal bug in the code that separates destructor and non-destructor member functions of C++ classes. The bug causes the destructor entries to remain in the main function list while the list length counter is decremented, resulting in an out-of-bounds write when the function list is copied to its final allocated array. An attacker can craft an ELF binary with malicious .stab and .stabstr sections that triggers this out-of-bounds write when a user opens the file in GDB and performs any symbol-inspection operation such as setting a breakpoint. The inferior process does not need to be executed. Under controlled conditions, this was demonstrated to achieve execution of arbitrary commands within the GDB process.

[ 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-Bund29 Sep 2026WID-SEC-2026-3650

  Red Hat Enterprise Linux (gdb): Vulnerability allows code execution Translated from German

  CVE-2026-13732

[ References ]References

• access.redhat.com/errata/RHSA-2026:73425vendor-advisoryx_refsource_REDHAT
• access.redhat.com/errata/RHSA-2026:73426vendor-advisoryx_refsource_REDHAT
• access.redhat.com/errata/RHSA-2026:73427vendor-advisoryx_refsource_REDHAT
• access.redhat.com/errata/RHSA-2026:79357vendor-advisoryx_refsource_REDHAT
• access.redhat.com/errata/RHSA-2026:82447vendor-advisoryx_refsource_REDHAT
• access.redhat.com/errata/RHSA-2026:82939vendor-advisoryx_refsource_REDHAT
• access.redhat.com/security/cve/CVE-2026-13732vdb-entryx_refsource_REDHAT
• bugzilla.redhat.com/show_bug.cgiissue-trackingx_refsource_REDHAT