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CVE-2026-31581
high
CVSS 7.8
Use-After-Free in c (CVE-2026-31581)
Summary
vulnerability in c (CVE-2026-31581). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31581** has been found in c.
Successful exploitation can lead to full system takeover. CVSS score: 7.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "c CVE-2026-31581" on the vendor's site.
CVE-2026-31581 (c) — CWE-416 / CVSS v3 7.8
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
**use-after-free** (CWE-416) exists in c.
📍 Affected scope
c — .
🔥 Severity
Severity: High (CVSS 7.8/10). Successful exploitation can lead to full system takeover
🔧 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 'c' .` 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 'c' . | 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 `c` 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/3dc20d1981d6a67d8184498a5da272942dde1e65
- web https://git.kernel.org/stable/c/51f6532790b74ffdd6970bc848358a2838c1c185
- web https://git.kernel.org/stable/c/af75b486f7e883e3422ece23c8d727e6815144a0
- web https://git.kernel.org/stable/c/b9c826916fdce6419b94eb0cd8810fdac18c2386
- web https://git.kernel.org/stable/c/ba88461f7653636c48321ca993006a74724c2f41
- web https://git.kernel.org/stable/c/d21e8a2af4869b5890b34e081d5aeadc93e9cd5c
- web https://git.kernel.org/stable/c/e247a0e01d15ed420f77ec5e2335721bf430a5b3
- web https://git.kernel.org/stable/c/e719232f4552e29de8027a83918ea94434be87af
- web https://git.kernel.org/stable/c/e88354b381e2006de63d6b052ed7005c9a47d00e
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31581
- web https://github.com/advisories/GHSA-8wc2-723q-hf3g