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CVE-2026-43104
medium
CVSS 5.5
Vulnerability in linux (CVE-2026-43104)
Summary
vulnerability in linux (CVE-2026-43104). Risk of unauthorized operations or information disclosure. Exploitable via ``kernel_state``.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-43104** has been found in linux.
Attackers can target a specific entry point like ``kernel_state`` over the network to misuse the product.
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-2026-43104" on the vendor's site.
CVE-2026-43104 (linux) — CWE-401 / CVSS v3 5.5
Attack vector: local / no user interaction
Attack surface: `kernel_state`
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. Attackers reach the vulnerable code path via ``kernel_state`` without authentication.
📍 Affected scope
linux — . Attack surface: `kernel_state`.
🔥 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-2026-43104
- web https://git.kernel.org/stable/c/3eb7dd55021d0f4308fbea0bea21d2118984d8e7
- web https://git.kernel.org/stable/c/9525d169e5fd481538cf8c663cc5839e54f2e481
- web https://git.kernel.org/stable/c/d8fdd6adc07b78ad3e9ee0004876d90cb59ca941
- web https://git.kernel.org/stable/c/dd5c49787a32da96a2b154427eb17cbf12a83c28
- web https://git.kernel.org/stable/c/e352e9adc9f6df54d63150ff832f71c04e30744b
- web https://github.com/advisories/GHSA-585p-9mg2-6vmm
- web https://git.kernel.org/stable/c/259e2bba3fd7005c62cbd42365a48b3221b244e3
- web https://git.kernel.org/stable/c/9487daa18e627ac6b5ed5911be79f23362554b70
- web https://git.kernel.org/stable/c/c197def3834cbee3fd824ce4c57d08cb24e18955