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CVE-2026-23112
critical
CVSS 9.8
Out-of-Bounds Write in linux (CVE-2026-23112)
Summary
out-of-bounds write in linux (CVE-2026-23112). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-23112** 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-2026-23112" on the vendor's site.
CVE-2026-23112 (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
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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/0b9981751be14b59b4473383c731c833738aebdb
- web https://git.kernel.org/stable/c/1385be357e8acd09b36e026567f3a9d5c61139de
- web https://git.kernel.org/stable/c/19672ae68d52ff75347ebe2420dde1b07adca09f
- web https://git.kernel.org/stable/c/42afe8ed8ad2de9c19457156244ef3e1eca94b5d
- web https://git.kernel.org/stable/c/52a0a98549344ca20ad81a4176d68d28e3c05a5c
- web https://git.kernel.org/stable/c/ab200d71553bdcf4de554a5985b05b2dd606bc57
- web https://git.kernel.org/stable/c/dca1a6ba0da9f472ef040525fab10fd9956db59f
- web https://cert-portal.siemens.com/productcert/html/ssa-253495.html
- web https://nvd.nist.gov/vuln/detail/CVE-2026-23112
- web https://git.kernel.org/stable/c/043b4307a99f902697349128fde93b2ddde4686c
- web https://github.com/advisories/GHSA-jjrf-jfrm-p64x