CVE-2023-39130

Debugger crash via malformed PE export data

Published Jul 25, 2023 · Updated Oct 24, 2024

A heap buffer overflow in GNU GDB 13.0.50.20220805-git allows local users to crash the debugger through a crafted PE executable. The pe_as16 function in gdb/coff-pe-read.c reads a two-byte export-table value without first establishing that both bytes remain inside the heap buffer. Triggering the parser requires a user to make GDB inspect a malformed PE file; the supported impact is termination of that command-line debugger process.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A heap buffer overflow in GNU GDB 13.0.50.20220805-git allows local users to crash the debugger through a crafted PE executable. The pe_as16 function in gdb/coff-pe-read.c reads a two-byte export-table value without first establishing that both bytes remain inside the heap buffer. Triggering the parser requires a user to make GDB inspect a malformed PE file; the supported impact is termination of that command-line debugger process.

The record

CVE
CVE-2023-39130
Published
Jul 25, 2023
Updated
Oct 24, 2024
Vendor
GNU
Product
GNU Debugger (GDB)
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 24, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=13.0.50.20220805-git

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

GNU · GNU Debugger (GDB)version=13.0.50.20220805-git

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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