Vulnerability in imagemagick (UBUNTU-CVE-2026-25638)
Summary
Vulnerability in imagemagick (UBUNTU-CVE-2026-25638). Risk of unauthorized operations or information disclosure. Exploitable via WriteMSLImage. Mitigation: upgrade to 8:6.7.7.10-6ubuntu3.13+esm21 or later.
Original description
The description as published by the source.
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, memory leak exists in coders/msl.c. In the WriteMSLImage function of the msl.c file, resources are allocated. But the function returns early without releasing these allocated resources. Versions 7.1.2-15 and 6.9.13-40 contain a patch.
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-2026-25638 has been found in imagemagick.
Attackers can target a specific entry point like WriteMSLImage over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade imagemagick to 8:6.7.7.10-6ubuntu3.13+esm21 or later.
If unsure, ask your IT team or search "imagemagick UBUNTU-CVE-2026-25638" on the vendor's site.
UBUNTU-CVE-2026-25638 (imagemagick)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: WriteMSLImage / msl.c
Patched: 8:6.7.7.10-6ubuntu3.13+esm21 — 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 imagemagick. Attackers reach the vulnerable code path via WriteMSLImage without authentication.
Check the vendor advisory for the affected versions of imagemagick. Attack surface: WriteMSLImage / msl.c.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 8:6.7.7.10-6ubuntu3.13+esm21.
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 'imagemagick' . 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 'imagemagick' . | 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
imagemagick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 imagemagick to 8:6.7.7.10-6ubuntu3.13+esm21ステージング環境で 8:6.7.7.10-6ubuntu3.13+esm21 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。
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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