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CVE-2026-43281
high
CVSS 7.1
Out-of-Bounds Read in linux (CVE-2026-43281)
Summary
vulnerability in linux (CVE-2026-43281). Confidential information can be exposed externally. Exploitable via ``fw_xlate``.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-43281** has been found in linux.
Attackers can target a specific entry point like ``fw_xlate`` over the network to misuse the product.
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 "linux CVE-2026-43281" on the vendor's site.
CVE-2026-43281 (linux) — CWE-125 / CVSS v3 7.1
Attack vector: local / no user interaction
Attack surface: `fw_xlate`
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. Attackers reach the vulnerable code path via ``fw_xlate`` without authentication.
📍 Affected scope
linux — . Attack surface: `fw_xlate`.
🔥 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 '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/01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d
- web https://git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36f
- web https://git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265
- web https://git.kernel.org/stable/c/4caae8168d1b808c7d4ff481295292e3f97f90fb
- web https://git.kernel.org/stable/c/f50b39fd7c72a8734153644ee945ca0d8b2e65ab
- web https://git.kernel.org/stable/c/fcd7f96c783626c07ee3ed75fa3739a8a2052310
- web https://nvd.nist.gov/vuln/detail/CVE-2026-43281
- web https://github.com/advisories/GHSA-78gq-46gf-2hpp