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Fencer Vulns
high 7.3

CVE-2025-70103 json

Heap buffer overflow vulnerability in libjxl 0.12.0 via crafted PBM images to the jxl::extras::DecodeImagePNM function in file lib/extras/d…

published 2026-05-27 5 mo ago modified 2026-10-12 27 d ago also EUVD-2025-209978

cvss
7.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

Heap buffer overflow vulnerability in libjxl 0.12.0 via crafted PBM images to the jxl::extras::DecodeImagePNM function in file lib/extras/dec/pnm.cc.

Patch / fix

  • jpeg-xl Debian 13 0.11.2-0.1~deb13u2
  • jpeg-xl Debian 14 0.11.2-5.1

debian advisories DEBIAN-CVE-2025-70103

  • jpeg-xl Ubuntu 25.10 0.11.1-6ubuntu1.2
  • jpeg-xl Ubuntu 26.04 LTS 0.11.1-6ubuntu4.2

ubuntu advisories UBUNTU-CVE-2025-70103

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

  • mozjs128 SLES 16.0, SLES for SAP applications 16.0 128.14.0-160000.3.1
  • libjxl SLES for SAP applications 16.0, SLES 16.0 0.11.2-160000.2.1

suse advisories SUSE-SU-2026:22201-1SUSE-SU-2026:22210-1SUSE-SU-2026:22174-1

  • mozjs128 openSUSE Leap 16.0 128.14.0-160000.3.1
  • libjxl openSUSE Leap 16.0 0.11.2-160000.2.1
  • libjxl-gtk openSUSE Leap 16.0 0.11.2-160000.2.1
  • mozjs140 openSUSE Tumbleweed 140.10.1-2.1
  • mozjs115 openSUSE Tumbleweed 115.15.0-9.1
  • libjxl openSUSE Tumbleweed 0.11.2-2.1

opensuse advisories openSUSE-SU-2026:21114-1openSUSE-SU-2026:21100-1openSUSE-SU-2026:10955-1openSUSE-SU-2026:10935-1openSUSE-SU-2026:10910-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-70103 updated cvss 7.6

libjxl: libjxl: Arbitrary code execution via crafted PBM images

  • Red Hat Enterprise Linux 8 thunderbird
    not affected: vulnerable code not in execute path
  • Red Hat Enterprise Linux 9 thunderbird Red Hat Enterprise Linux 10 firefox, thunderbird
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/libjxl/libjxl/issues/4337 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CNA 3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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.