Vulnerability in libde265 (UBUNTU-CVE-2026-49346)
Summary
Vulnerability in libde265 (UBUNTU-CVE-2026-49346). Risk of unauthorized operations or information disclosure. Exploitable via size_t. Mitigation: upgrade to 1.0.2-2ubuntu0.16.04.1~esm6 or later.
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as UBUNTU-CVE-2026-49346 has been found in libde265.
Attackers can target a specific entry point like size_t over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade libde265 to 1.0.2-2ubuntu0.16.04.1~esm6 or later.
If unsure, ask your IT team or search "libde265 UBUNTU-CVE-2026-49346" on the vendor's site.
UBUNTU-CVE-2026-49346 (libde265)
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: size_t
Patched: 1.0.2-2ubuntu0.16.04.1~esm6 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (unclassified) exists in libde265. Attackers reach the vulnerable code path via size_t without authentication.
Check the vendor advisory for the affected versions of libde265. Attack surface: size_t.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 1.0.2-2ubuntu0.16.04.1~esm6.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'libde265' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'libde265' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
libde265を grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade libde265 to 1.0.2-2ubuntu0.16.04.1~esm6ステージング環境で 1.0.2-2ubuntu0.16.04.1~esm6 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory ubuntu.com
- report ubuntu.com
- report cve.org
- report github.com