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CVE-2026-53263
medium
CVSS 5.5
Vulnerability in linux (CVE-2026-53263)
Summary
vulnerability in linux (CVE-2026-53263). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-53263** has been found in linux.
Risk of unauthorized operations or information disclosure. CVSS score: 5.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2026-53263" on the vendor's site.
CVE-2026-53263 (linux) — CWE-193 / CVSS v3 5.5
Attack vector: local / no user interaction
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.
❓ What is the problem
**A vulnerability** (CWE-193) exists in linux.
📍 Affected scope
linux — .
🔥 Severity
Severity: Medium (CVSS 5.5/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'linux' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'linux' . | 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 `linux` を grep し、稼働しているサービス・バージョンを把握する。
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7Post-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 Step 3 と同じログクエリでアラート再発が無いか継続監視。
References
- web https://nvd.nist.gov/vuln/detail/CVE-2026-53263
- web https://git.kernel.org/stable/c/06ce6fc106b16dec9b535950db626261be865e5b
- web https://git.kernel.org/stable/c/2a58899d11009bffc7b4b32a571858f381121837
- web https://git.kernel.org/stable/c/4485d79617520d84ba5a14515e2b5136007d6deb
- web https://git.kernel.org/stable/c/c32f30ef5e66adbfa102348e2e8a23776eb007cb
- web https://git.kernel.org/stable/c/da8808463882c3f3c357b072e25053c2121f1419
- web https://git.kernel.org/stable/c/da8cbb64b47e9066b40af0de170901caf17b768c
- web https://git.kernel.org/stable/c/dcb1bec1c32ee5c3878354e087cf5dbee2b7c7af
- web https://git.kernel.org/stable/c/f24a58c72a45f4c109f3557a760cc4b60b7a6037
- web https://github.com/advisories/GHSA-fq9x-8g2w-4p5r