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Fencer Vulns
high 7.8

CVE-2024-26540 json

A heap-based buffer overflow in Clmg before 3.3.3 can occur via a crafted file to cimg_library::CImg<unsigned char>::_load_analyze.

published 2024-03-15 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-23805

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

A heap-based buffer overflow in Clmg before 3.3.3 can occur via a crafted file to cimg_library::CImg<unsigned char>::_load_analyze.

Patch / fix

  • clmg_project clmg 3.3.3
  • cimg Debian 14, Debian 13 3.5.0+dfsg-1

debian advisories DEBIAN-CVE-2024-26540

  • cimg Ubuntu Pro 18.04 LTS 1.7.9+dfsg-2ubuntu0.18.04.2+esm1
  • cimg Ubuntu Pro 22.04 LTS 2.9.4+dfsg-3ubuntu0.1~esm1
  • cimg Ubuntu Pro 24.04 LTS 3.2.1+dfsg-1ubuntu0.24.04.1~esm1

ubuntu advisories UBUNTU-CVE-2024-26540

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/GreycLab/CImg/issues/403 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • clmg_project clmg

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.