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BELL-CVE-2026-13732

Affected: Alpaquita:23: gdb, Alpaquita:25: gdb, Alpaquita:stream: gdb, BellSoft Hardened Containers:23: gdb, BellSoft Hardened Containers:25: gdb, BellSoft Hardened Containers:stream: gdb

fkie_cve-2026-13732

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.

GHSA-j2fm-9w3c-hpj9

msrc_CVE-2026-13732 — Gdb: gdb: out-of-bounds write in stabs parser read_member_functions() via crafted elf

msrc_CVE-2026-13732

openSUSE-SU-2026:21890-1 — Security update for gdb

Security update for gdb

RHSA-2026:73425 — Red Hat Security Advisory: gdb security update

gdb: gdb: Out-of-bounds write in STABS parser read_member_functions() via crafted ELF

RLSA-2026:73425 — Important: gdb security update

Affected: Rocky Linux:8: gdb

The GNU Debugger (GDB) allows debugging programs written in C, C++, Java, and other languages by executing them in a controlled fashion and then printing their data.

Security Fix(es):

* gdb: STABS debug format parser out-of-bounds write via crafted ELF binary (CVE-2026-13732)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

SUSE-SU-2026:23849-1 — Security update for gdb

Security update for gdb

UBUNTU-CVE-2026-13732

Affected: Ubuntu:Pro:16.04:LTS: gdb, Ubuntu:Pro:18.04:LTS: gdb, Ubuntu:20.04:LTS: gdb, Ubuntu:22.04:LTS: gdb, Ubuntu:24.04:LTS: gdb, Ubuntu:26.04:LTS: gdb