Vulnerability in Linux Kernel (CVE-2020-36558)
Summary
Vulnerability in Linux Kernel (CVE-2020-36558). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
A race condition in the Linux kernel before 5.5.7 involving VT_RESIZEX could lead to a NULL pointer dereference and general protection fault.
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2020-36558 has been found in Linux Kernel.
Risk of unauthorized operations or information disclosure. CVSS score: 5.1/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Linux Kernel CVE-2020-36558" on the vendor's site.
CVE-2020-36558 (Linux Kernel) — CWE-362 / CVSS v3 5.1
Attack vector: local / 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.
A vulnerability (CWE-362) exists in Linux Kernel.
Check the vendor advisory for the affected versions of Linux Kernel.
Severity: Medium (CVSS 5.1/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Linux Kernel を使っているサービスとバージョンを洗い出す。
-
2Post-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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2020-36558 linux Fixed in: 5.5.13-1
- Ubuntu UBUNTU-CVE-2020-36558 linux-aws Fixed in: 4.4.0-1066.70
References
- exploit git.kernel.org
- patch cdn.kernel.org