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GDB CVE-2026-13732

| EUVDEUVD-2026-68746 HIGH
Out-of-bounds Write (CWE-787)
2026-08-31 redhat GHSA-j2fm-9w3c-hpj9
Buffer Overflow Memory Corruption Red Hat Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 9 Suse Red Hat Hardened Images Red Hat
7.0
CVSS 3.1 · NVD
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Severity by source

Vendor (redhat) PRIMARY
HIGH
qualitative
NVD
7.0 HIGH
AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
vuln.today AI
7.0 HIGH

User must open a crafted file locally in GDB (AV:L/UI:R); reliable heap-layout exploitation is complex (AC:H); full GDB process compromise demonstrated (C:H/I:H/A:H).

3.1 AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:L/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
7.8 HIGH
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Red Hat
7.0 HIGH
qualitative

Primary rating from Vendor (redhat).

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Updated
Sep 04, 2026 - 15:29 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Sep 04, 2026 - 15:22 vuln.today
cvss_changed
CVSS changed
Sep 04, 2026 - 15:22 NVD
7.8 (HIGH) 7.0 (HIGH)
Analysis Generated
Aug 31, 2026 - 19:52 vuln.today
CVE Published
Aug 31, 2026 - 19:23 cve.org
HIGH 7.8

DescriptionNVD

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.

AnalysisAI

Out-of-bounds heap write in GDB's legacy STABS debug format parser allows arbitrary code execution within the GDB process when a user opens a crafted ELF binary. The root cause is a linked-list removal bug in read_member_functions() (gdb/stabsread.c) that retains destructor entries in the main function list after decrementing the length counter, causing the subsequent array copy to write beyond allocated bounds. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Delivery
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Exploit
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Vulnerability AssessmentAI

Exploitation The user must open a specially crafted ELF binary directly in GDB and execute any symbol-inspection operation - for example, `info functions`, `ptype`, `list`, or setting a breakpoint; the inferior process itself does not need to be run. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector (AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H, score 7.0) accurately represents the attack model: the victim must deliberately open a crafted ELF locally in GDB, and crafting a reliably exploitable binary is technically complex due to heap-layout sensitivity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Consult Red Hat's CVE tracker at https://access.redhat.com/security/cve/CVE-2026-13732 for issued errata and apply any available GDB package updates via `dnf update gdb` on affected RHEL systems; no specific patched version number is available in the current data and should be verified against Red Hat errata directly. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: inventory GDB deployments across development and analysis teams, disable STABS format support in GDB config files (enforce dwarf2 format preference), and distribute security advisory prohibiting manual debugging of untrusted binaries. …

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Same weakness CWE-787 – Out-of-bounds Write

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Same technique Buffer Overflow

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Module for Development Tools 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected
SUSE Linux Enterprise Server 16.0 Affected
SUSE Linux Enterprise Server 16.1 Affected

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CVE-2026-13732 vulnerability details – vuln.today
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