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Fencer Vulns
high 7.1

CVE-2026-49346 json

libde265 has a heap buffer overflow in de265_image_get_buffer via SPS dimension integer overflow

published 2026-06-19 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-38080 , JLSEC-2026-790

cvss
7.1
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 31%
public exploits
0
none known

Summary

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.1.0, a crafted H.265 bitstream with large SPS dimensions and 16-bit bit depth causes a signed integer overflow in `de265_image_get_buffer()` (`libde265/image.cc:128`). The overflow wraps the plane allocation size to a small value (~1 KB), but the subsequent `fill_image()` call computes the real size using `size_t`, writing ~4 GB into the undersized heap buffer. Version 1.1.0 patches the issue.

Patch / fix

  • julia libde265_jll 1.1.0+0
  • struktur libde265 1.1.0
  • libde265 Debian 12 1.0.11-1+deb12u3
  • libde265 Debian 13 1.0.15-1+deb13u1
  • libde265 Debian 14 1.1.1-1

debian advisories DEBIAN-CVE-2026-49346

  • libde265 Ubuntu 24.04 LTS 1.0.15-1ubuntu0.1
  • libde265 Ubuntu Pro 16.04 LTS 1.0.2-2ubuntu0.16.04.1~esm6
  • libde265 Ubuntu Pro 18.04 LTS 1.0.2-2ubuntu0.18.04.1~esm6
  • libde265 Ubuntu Pro 20.04 LTS 1.0.4-1ubuntu0.4+esm2
  • libde265 Ubuntu Pro 22.04 LTS 1.0.8-1ubuntu0.3+esm2
  • libde265 Ubuntu Pro 26.04 LTS 1.0.16-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2026-49346

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

  • libde265 Alpine 3.24 1.1.3-r0

alpine advisories ALPINE-CVE-2026-49346

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org 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
partial
Assessed
4 mo ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/strukturag/libde265/security/advisories/GHSA-vv8h-932h-7r86 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
OSV 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Affected packages

ecosystem package affected fixed in
julia libde265_jll
<1.1.0+0
1.1.0+0

Affected products

  • strukturag libde265

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.