CVE-2026-9503Public exploit

Process crash via malformed compressed DWG section

Published May 25, 2026 · Updated May 25, 2026

NULL pointer dereference in GNU LibreDWG 0.14 and earlier allows local users to crash DWG-processing applications with a malformed DWG file. The 2004 compressed-section decoder fails to reject section addresses and sizes that exceed the decompression buffer, leaving entity traversal to dereference a null pointer in dwg_next_entity. The demonstrated path requires a local user to run dwg2SVG against the crafted file and interrupts only that process; no code execution or data access is reported.

CVSS severityUnavailable
Unscored
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in GNU LibreDWG 0.14 and earlier allows local users to crash DWG-processing applications with a malformed DWG file. The 2004 compressed-section decoder fails to reject section addresses and sizes that exceed the decompression buffer, leaving entity traversal to dereference a null pointer in dwg_next_entity. The demonstrated path requires a local user to run dwg2SVG against the crafted file and interrupts only that process; no code execution or data access is reported.

The record

CVE
CVE-2026-9503
Published
May 25, 2026
Updated
May 25, 2026
Vendor
The GnuPG Project
Product
LibreDWG
Classifications
CWE-476, CWE-404, T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 25, 2026CVE publishedPublication date reported by the CVE source.
  2. May 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.1
  2. Affected versionversion=0.10
  3. Affected versionversion=0.11
  4. Affected versionversion=0.12
  5. Affected versionversion=0.13
  6. Affected versionversion=0.14
  7. Affected versionversion=0.2
  8. Affected versionversion=0.3
  9. Affected versionversion=0.4
  10. Affected versionversion=0.5
  11. Affected versionversion=0.6
  12. Affected versionversion=0.7
  13. Affected versionversion=0.8
  14. Affected versionversion=0.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The GnuPG Project · LibreDWGversion=0.1; version=0.10; version=0.11; version=0.12; version=0.13; version=0.14; version=0.2; version=0.3; version=0.4; version=0.5; version=0.6; version=0.7; version=0.8; version=0.9

Published CVSS scores

3.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
1.7VulDBAV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C
3.3VulDBCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CWE-404Improper Resource Shutdown or Release
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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