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CVE-2026-23204
high
CVSS 7.1
Out-of-Bounds Read in c (CVE-2026-23204)
Summary
vulnerability in c (CVE-2026-23204). Confidential information can be exposed externally.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-23204** has been found in c.
Confidential information can be exposed externally. CVSS score: 7.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "c CVE-2026-23204" on the vendor's site.
CVE-2026-23204 (c) — CWE-125 / CVSS v3 7.1
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
**out-of-bounds read** (CWE-125) exists in c.
📍 Affected scope
c — .
🔥 Severity
Severity: High (CVSS 7.1/10). 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 '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。
-
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
- advisory https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23204.json
- package https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- web https://git.kernel.org/stable/c/13336a6239b9d7c6e61483017bb8bdfe3ceb10a5
- web https://git.kernel.org/stable/c/8a672f177ebe19c93d795fbe967846084fbc7943
- web https://git.kernel.org/stable/c/cabd1a976375780dabab888784e356f574bbaed8
- web https://git.kernel.org/stable/c/cfa745830e45ecb75c061aa34330ee0cac941cc7
- web https://git.kernel.org/stable/c/e41a23e61259f5526af875c3b86b3d42a9bae0e5
- web https://nvd.nist.gov/vuln/detail/CVE-2026-23204
- web https://git.kernel.org/stable/c/29681ed51e737be14d18ecd1c304c57002e4b72c
- web https://github.com/advisories/GHSA-rf63-9f5h-hhg6
- web https://git.kernel.org/stable/c/66e4b63d61c15de6ca5332d9ca6db59a404d7136
- web https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- web https://cert-portal.siemens.com/productcert/html/ssa-082556.html