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CVE-2026-46253
high
CVSS 7.8
Out-of-Bounds Write in linux (CVE-2026-46253)
Summary
out-of-bounds write in linux (CVE-2026-46253). Successful exploitation can lead to full system takeover.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-46253** has been found in linux.
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 "linux CVE-2026-46253" on the vendor's site.
CVE-2026-46253 (linux) — CWE-787 / 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
**out-of-bounds write** (CWE-787) exists in linux.
📍 Affected scope
linux — .
🔥 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 '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。
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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://nvd.nist.gov/vuln/detail/CVE-2026-46253
- web https://git.kernel.org/stable/c/06d2c8bd108cea503f6f6e13e47495ed1085275f
- web https://git.kernel.org/stable/c/2fa9a047c6a50ec80c3890dd623b85e237f0d1fd
- web https://git.kernel.org/stable/c/4f73486ca822305c1cf5b8ebc0b53a6ab3801a81
- web https://git.kernel.org/stable/c/5669645c052f235726a85f443769b6fc02f66762
- web https://git.kernel.org/stable/c/58bda5a1d1ee98254383ef34f76b2c35140513ea
- web https://git.kernel.org/stable/c/7cfe964e61c0ab667abd5f5b68e0acbf783efa4f
- web https://git.kernel.org/stable/c/9a6fc69a570c0780834246d52c856cc3dbc2605f
- web https://git.kernel.org/stable/c/cff0ef043e16feb5a02307c8f9d0117a96c5587c
- web https://github.com/advisories/GHSA-rwx9-m3pj-2mv2