High 7.0

Out-of-Bounds Write in GDB's STABS debug format parser

CVE-2026-13732 First seen on SecPulse Sep 1, 05:17

AI summary

Produced by SecPulse using an external AI model; it may contain mistakes. Check the original description and references below before acting on it.

A vulnerability tracked as CVE-2026-13732 has been found in GDB's STABS debug format parser.
Successful exploitation can lead to full system takeover. CVSS score: 7.0/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "GDB's STABS debug format parser CVE-2026-13732" on the vendor's site.

CVE-2026-13732 (GDB's STABS debug format parser) — CWE-787 / CVSS v3 7.0
Attack vector: local / unauthenticated
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

What is the problem

Out-of-bounds write (CWE-787) exists in GDB's STABS debug format parser.

Affected scope

Check the vendor advisory for the affected versions of GDB's STABS debug format parser.

Severity

Severity: High (CVSS 7.0/10). Successful exploitation can lead to full system takeover.

How to fix

Update to the patched release per vendor advisory.

Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposureidentify
```
Audit SBOM/dependencies for affected components.
```
資産台帳・SBOM・依存マニフェストで GDB's STABS debug format parser を使っているサービスとバージョンを洗い出す。
2
Post-deployment verificationverify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Fix status by distribution

Records published by each distribution for this CVE. Fixed versions differ by release; check each link.

Debian DEBIAN-CVE-2026-13732 gdb No fixed version in this record
Ubuntu UBUNTU-CVE-2026-13732 gdb No fixed version in this record

Original description The description as published by the source.

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.

Source: NIST National Vulnerability Database NVD GitHub Advisory

AI summary

Response actions

Fix status by distribution

References