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CVE-2026-43453
high
CVSS 7.1
Out-of-Bounds Read in linux (CVE-2026-43453)
Summary
vulnerability in linux (CVE-2026-43453). Confidential information can be exposed externally.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-43453** has been found in linux.
Confidential information can be exposed externally. CVSS score: 7.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2026-43453" on the vendor's site.
CVE-2026-43453 (linux) — CWE-125 / CVSS v3 7.1
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
**out-of-bounds read** (CWE-125) exists in linux.
📍 Affected scope
linux — .
🔥 Severity
Severity: High (CVSS 7.1/10). 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/0a55d62cdb628923d8a21724374a70c76ac7d19d
- web https://git.kernel.org/stable/c/1957e793196e7f8557374fd4eda53abcbb42e1c0
- web https://git.kernel.org/stable/c/324b749aa5b2d516ccfab933df9d3f56e7807f5f
- web https://git.kernel.org/stable/c/57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e
- web https://git.kernel.org/stable/c/60c1d18781e37bfb96290b86510eb01c5fa24d75
- web https://git.kernel.org/stable/c/d6d8cd2db236a9dd13dbc2d05843b3445cc964b5
- web https://git.kernel.org/stable/c/dfbdac719198778b581bc0dd055df2542edb8c62
- web https://git.kernel.org/stable/c/e047f6fbb975f685d6c9fcef95b3b7787a79b46d
- web https://nvd.nist.gov/vuln/detail/CVE-2026-43453
- web https://github.com/advisories/GHSA-hc7j-44jc-q764