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GHSA-9493-H29P-RFM2 runc container escape via "masked path" abuse due to mount race conditions

🗓️ 05 Nov 2025 16:37:15Reported by GoogleType 
osv
 osv🔗 osv.dev👁 1 Views

Runc escape via maskedPaths race allows replacing /dev/null with a symlink to mount host paths.

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GithubExploit		Exploit for CVE-2025-31133
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Tenable Nessus		Amazon Linux 2023 : runc (ALAS2023-2025-1286)
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04 Feb 2026 03:47Current
6.9Medium risk
Vulners AI Score6.9
CVSS 47.3
EPSS0.00021
runc masked pathscontainer escapedev null substitutionarbitrary host mountsrace condition
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