← Back
CVE-2026-31705
critical
CVSS 9.8
Out-of-Bounds Write in linux (CVE-2026-31705)
Summary
out-of-bounds write in linux (CVE-2026-31705). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-31705** has been found in linux.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2026-31705" on the vendor's site.
CVE-2026-31705 (linux) — CWE-787 / CVSS v3 9.8
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 write** (CWE-787) exists in linux.
📍 Affected scope
linux — .
🔥 Severity
Severity: Critical (CVSS 9.8/10). 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 '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。
-
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/30010c952077a1c89ecdd71fc4d574c75a8f5617
- web https://git.kernel.org/stable/c/790304c02bf9bd7b8171feda4294d6e62d32ae8f
- web https://git.kernel.org/stable/c/922d48fe8c19f388ffa2f709f33acaae4e408de2
- web https://git.kernel.org/stable/c/98f3de6ef4efbd899348d333f0902dc4ff14380c
- web https://git.kernel.org/stable/c/ddbbc8b2a09dd2cfed90871313e3691ae1db08a2
- web https://git.kernel.org/stable/c/ffbce350c6fd1e99116ea57383b9031717e36d3b
- web https://nvd.nist.gov/vuln/detail/CVE-2026-31705
- web https://github.com/advisories/GHSA-5jgf-2w89-7334