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CVE-2026-43269
medium
CVSS 5.5
Vulnerability in linux (CVE-2026-43269)
Summary
vulnerability in linux (CVE-2026-43269). Risk of unauthorized operations or information disclosure.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-43269** 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-2026-43269" on the vendor's site.
CVE-2026-43269 (linux) — CWE-401 / 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-401) 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
-
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://git.kernel.org/stable/c/082271e364a3205598c2e4e6233a9f49ce7941cf
- web https://git.kernel.org/stable/c/25e832a7830740e72103eb0b527680a4b64bbcb3
- web https://git.kernel.org/stable/c/3e64e78f4a70e3f6ac8fe5a7071f08ffd25a2489
- web https://git.kernel.org/stable/c/5718d98976ad6b9700e5a6afec67fc47a8a92580
- web https://git.kernel.org/stable/c/57fa3487acfa3467405f8506b94682abd96e7393
- web https://git.kernel.org/stable/c/6d4e91ab97fda64e8cf9c8881cc3b4da026bd849
- web https://git.kernel.org/stable/c/ec40702029b08ee8d5f5b03303d64a10e74a957b
- web https://git.kernel.org/stable/c/f12352471061df83a36edf54bbb16284793284e4
- web https://nvd.nist.gov/vuln/detail/CVE-2026-43269
- web https://github.com/advisories/GHSA-9729-xjvh-4qp8