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Fencer Vulns
high 7.1

CVE-2026-49295 json

libde265 has an out-of-bounds write in process_reference_picture_set via predicted short-term RPS

published 2026-06-19 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-38079 , JLSEC-2026-789

cvss
7.1
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 27%
public exploits
0
none known

Summary

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted H.265 bitstream can cause an out-of-bounds array write in `decoder_context::process_reference_picture_set()` (`libde265/decctx.cc:1376`). The root cause is a missing aggregate bound check on predicted short-term reference picture set entries. Individual list sizes are validated, but the combined count after predicted RPS construction can exceed the 16-entry `PocStFoll` array, writing at index 16. Version 1.0.20 patches the issue.

Patch / fix

  • julia libde265_jll 1.1.0+0
  • struktur libde265 1.0.20
  • 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-2026-49295

  • 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-2026-49295

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-2026-49295

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
none
Automatable
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/strukturag/libde265/security/advisories/GHSA-g2rg-wj66-w594 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

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.