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CVE-2026-43407
critical
CVSS 9.1
Out-of-Bounds Read in linux (CVE-2026-43407)
Summary
vulnerability in linux (CVE-2026-43407). Confidential information can be exposed externally.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-43407** has been found in linux.
Confidential information can be exposed externally. CVSS score: 9.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2026-43407" on the vendor's site.
CVE-2026-43407 (linux) — CWE-125 / CVSS v3 9.1
Attack vector: remote (network-reachable) / unauthenticated / 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
**out-of-bounds read** (CWE-125) exists in linux.
📍 Affected scope
linux — .
🔥 Severity
Severity: Critical (CVSS 9.1/10). Confidential information can be exposed externally
🔧 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://git.kernel.org/stable/c/6cee34d6669fe176b4259131adb1a145c939b472
- web https://git.kernel.org/stable/c/8bb87547e92dcf0928ed763c60e0ac8d733c3656
- web https://git.kernel.org/stable/c/9f9e2297f45fc2d2524eb104c289d69ddef95665
- web https://git.kernel.org/stable/c/b282c43ed156ae15ea76748fc15cd5c39dc9ab72
- web https://git.kernel.org/stable/c/ea080b21092590122c3f971cf588932cdbf47847
- web https://git.kernel.org/stable/c/ed024d2f4c79c0eb2464df0fb640610ac301f9a0
- web https://git.kernel.org/stable/c/edc678e5cd11730a2834b43071d8923f05bc334d
- web https://git.kernel.org/stable/c/f9da5c1bbac5c8e33259fe00ed7347438fffa969
- web https://nvd.nist.gov/vuln/detail/CVE-2026-43407
- web https://github.com/advisories/GHSA-g5m7-8jmr-xx94