CVE catalog
CVE-2026-49337
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted sequence of H.265 NAL units causes `decoder_context::read_slice_NAL()` (`libde265/decctx.cc:481`)
- Severity
- Medium · CVSS 4.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.33% · Oct 25, 2026
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted sequence of H.265 NAL units causes `decoder_context::read_slice_NAL()` (`libde265/decctx.cc:481`) to attach slice headers to a finished picture object that has no active image unit, resulting in attacker-controlled unbounded heap growth. The retained headers are never freed until the picture is released, which may not happen during continuous streaming. Version 1.0.20 patches the issue.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libde265 | sid | 1.1.3-1 | fixed |
| Debian | libde265 | forky | 1.1.3-1 | fixed |
| Debian | libde265 | trixie | 1.0.15-1+deb13u2 | fixed |
| Debian | libde265 | trixie-security | 1.0.15-1+deb13u2 | fixed |
| Debian | libde265 | bookworm | 1.0.11-1+deb12u2 | vulnerable |
| Debian | libde265 | bookworm-security | 1.0.11-1+deb12u3 | fixed |
| Cpe | libde265 | Not reported | Not reported | vulnerable |
| Cpe | libde265 | Not reported | 1.0.15-1ubuntu0.1 | fixed |
| Cpe | libde265-0 | Not reported | 1.0.15-1ubuntu0.1 | fixed |
| Cpe | libde265-dev | Not reported | 1.0.15-1ubuntu0.1 | fixed |
| Cpe | libde265-examples | Not reported | 1.0.15-1ubuntu0.1 | fixed |
| Ubuntu | libde265 | pro | 1.0.16-1 | vulnerable |
| Ubuntu | libde265 | pro | 1.0.16-1build1 | vulnerable |
| Ubuntu | libde265 | pro | 1.0.16-1ubuntu0.1~esm1 | fixed |
| Ubuntu | libde265 | 24.04 | 1.0.12-2 | vulnerable |
| Ubuntu | libde265 | 24.04 | 1.0.13-1 | vulnerable |
| Ubuntu | libde265 | 24.04 | 1.0.15-1 | vulnerable |
| Ubuntu | libde265 | 24.04 | 1.0.15-1build1 | vulnerable |
| Ubuntu | libde265 | 24.04 | 1.0.15-1build2 | vulnerable |
| Ubuntu | libde265 | 24.04 | 1.0.15-1build3 | vulnerable |
| Ubuntu | libde265 | 24.04 | 1.0.15-1ubuntu0.1 | fixed |
| Ubuntu | libde265 | 25.10 | 1.0.15-1build5 | vulnerable |
| Ubuntu | libde265 | 25.10 | 1.0.16-1 | vulnerable |
| Alpine | libde265 | 3.24 | 1.1.3-r0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libde265 | source | sid | 1.1.1-1 | not yet assigned | Not reported | [1140431] |
| Debian | libde265 | source | forky | 1.1.1-1 | not yet assigned | Not reported | [1140431] |
| Debian | libde265 | source | trixie | 1.0.15-1+deb13u1 | not yet assigned | Not reported | [1140431] |
| Debian | libde265 | source | bookworm | 1.0.11-1+deb12u3 | not yet assigned | Not reported | [1140431] |
| Cpe | libde265 | cpe | Not reported | 1.0.15-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Cpe | libde265-0 | cpe | Not reported | 1.0.15-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Cpe | libde265-dev | cpe | Not reported | 1.0.15-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Cpe | libde265-examples | cpe | Not reported | 1.0.15-1ubuntu0.1 | Not reported | Not reported | Not reported |
| Ubuntu | libde265 | deb | pro | 1.0.16-1ubuntu0.1~esm1 | Not reported | UBUNTU-CVE-2026-49337 | Not reported |
| Ubuntu | libde265 | deb | 24.04 | 1.0.15-1ubuntu0.1 | Not reported | UBUNTU-CVE-2026-49337 | Not reported |
| Alpine | libde265 | apk | 3.24 | 1.1.3-r0 | Not reported | ALPINE-CVE-2026-49337 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libde265-0]Affected
Source package: [libde265]
Details (2)
1.0.11-1+deb12u2· amd64 · bookwormAffected · Fixed:
1.0.11-1+deb12u3nvd · libde265 · debian · bookworm; nvd · libde265 · debian · 12
1.0.11-1+deb12u2· arm64 · bookwormAffected · Fixed:
1.0.11-1+deb12u3nvd · libde265 · debian · bookworm; nvd · libde265 · debian · 12
- [libde265-dev]Affected
Source package: [libde265]
Details (2)
1.0.11-1+deb12u2· amd64 · bookwormAffected · Fixed:
1.0.11-1+deb12u3nvd · libde265 · debian · bookworm; nvd · libde265 · debian · 12
1.0.11-1+deb12u2· arm64 · bookwormAffected · Fixed:
1.0.11-1+deb12u3nvd · libde265 · debian · bookworm; nvd · libde265 · debian · 12
- [libde265-examples]Affected
Source package: [libde265]
Details (2)
1.0.11-1+deb12u2· amd64 · bookwormAffected · Fixed:
1.0.11-1+deb12u3nvd · libde265 · debian · bookworm; nvd · libde265 · debian · 12
1.0.11-1+deb12u2· arm64 · bookwormAffected · Fixed:
1.0.11-1+deb12u3nvd · libde265 · debian · bookworm; nvd · libde265 · debian · 12
[Debian 13 (Trixie)]
- [libde265-0]Affected
Source package: [libde265]
Details (5)
1.0.15-1+b3· amd64 · trixieAffected · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+b3· arm64 · trixieAffected · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+deb13u2· amd64 · trixie-securityFixed · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
- [libde265-dev]Affected
Source package: [libde265]
Details (5)
1.0.15-1+b3· amd64 · trixieAffected · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+b3· arm64 · trixieAffected · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+deb13u2· amd64 · trixie-securityFixed · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
- [libde265-examples]Affected
Source package: [libde265]
Details (5)
1.0.15-1+b3· amd64 · trixieAffected · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+b3· arm64 · trixieAffected · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+deb13u1· amd64 · trixie-security · Historical versionFixed · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+deb13u1· arm64 · trixie-securityFixed · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
1.0.15-1+deb13u2· amd64 · trixie-securityFixed · Fixed:
1.0.15-1+deb13u1nvd · libde265 · debian · 13
Observed:
References
- [https://github.com/strukturag/libde265/commit/683cb9fa603e35840642f98765ab95cdb71cadf9]
- [https://github.com/strukturag/libde265/security/advisories/GHSA-g5hj-rf9f-7vxm]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-49337]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-49337]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-49337]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-49337]
- [https://security-tracker.debian.org/tracker/CVE-2026-49337]
- [https://ubuntu.com/security/notices/USN-8573-1]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Ubuntu Security Notices (USN)]