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Fencer Vulns
medium 6.9

CVE-2026-45382 json

libde265 has a heap-buffer-overflow READ in decode_slice_unit_tiles via unvalidated PPS tile geometry

published 2026-07-21 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-46428

cvss
6.9
version 4.0, 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

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.19, `decoder_context::decode_slice_unit_tiles` (libde265/decctx.cc:920) reads `pps.CtbAddrRStoTS[ctbAddrRS]` at line 966 where `ctbAddrRS = ctbY * ctbsWidth + ctbX` is computed from PPS-supplied `colBd[]`/`rowBd[]` arrays without validating the result against `CtbAddrRStoTS.size() == sps->PicSizeInCtbsY`. A malformed PPS that passes `set_derived_values` but encodes geometry inconsistent with the SPS produces a `ctbAddrRS` past the allocation, causing a 4-byte heap-buffer-overflow READ. Version 1.0.19 fixes the issue.

Patch / fix

  • struktur libde265 1.0.19
  • 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-2026-45382

  • 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-2026-45382

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-2026-45382

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2026-45382 updated cvss 6.5

libde265: libde265: Denial of Service due to heap-buffer-overflow when processing malformed H.265 video

  • Red Hat All currently supported Red Hat products
    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
3 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/strukturag/libde265/security/advisories/GHSA-hwhx-x2mq-ccr9 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.