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CVE-2026-23455
critical
CVSS 9.1
Out-of-Bounds Read in linux (CVE-2026-23455)
Summary
vulnerability in linux (CVE-2026-23455). Confidential information can be exposed externally.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-23455** has been found in linux.
Confidential information can be exposed externally. CVSS score: 9.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "linux CVE-2026-23455" on the vendor's site.
CVE-2026-23455 (linux) — CWE-125 / CVSS v3 9.1
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 read** (CWE-125) exists in linux.
📍 Affected scope
linux — .
🔥 Severity
Severity: Critical (CVSS 9.1/10). 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/2121f5fbe88daff0f1fc5bc47d359426c74b86b0
- web https://git.kernel.org/stable/c/495e97af9e7249ee02b72bb1d0848a6efc3700f4
- web https://git.kernel.org/stable/c/633e8f87dad32263f6a57dccdb873f042c062111
- web https://git.kernel.org/stable/c/65fa92f79677858b14b9e4b7275f26639afe2710
- web https://git.kernel.org/stable/c/9d00fe7d6d7c5b5f1065a6e042b54f2e44bd6df8
- web https://git.kernel.org/stable/c/b652b05d51003ac074b912684f9ec7486231717b
- web https://git.kernel.org/stable/c/f173d0f4c0f689173f8cdac79991043a4a89bf66
- web https://git.kernel.org/stable/c/f5e4f4e4cdb75ec36802059a94195a31f193da60
- web https://nvd.nist.gov/vuln/detail/CVE-2026-23455
- web https://github.com/advisories/GHSA-gm78-p64f-gx97