{"id":"CVE-2026-41579","sourceIdentifier":"security-advisories@github.com","published":"2026-07-01T02:17:00.193","lastModified":"2026-07-02T19:36:49.830","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"runc is a CLI tool for spawning and running containers according to the OCI specification. In versions prior to 1.3.6, 1.4.0-rc.1, 1.4.0-rc.12, 1.5.0-rc.1, and 1.5.0-rc.1, when setting up the container rootfs, setupPtmx and setupDevSymlinks call os.Remove and os.Symlink with a filepath.Join string which allow an image with /dev as a symlink to trick runc into deleting files called ptmx on the host or creating a hardcoded set of symlinks with specific names and targets in an arbitrary pre-existing host directory. This issue is not exploitable under Docker, because Docker creates a top-level read-only layer that masks any malicious /dev symlink present in the container image — unlike some other Linux container tooling, whose higher-level runtimes built on runc remain exposed to exploitation via a malicious image. This issue has been fixed in versions 1.3.6, 1.4.3 and 1.5.0."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"opencontainers","product":"runc","versions":[{"version":"< 1.3.6","status":"affected"},{"version":">= 1.4.0-rc.1, < 1.4.3","status":"affected"},{"version":">= 1.5.0-rc.1, < 1.5.0-rc.3","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","baseScore":3.3,"baseSeverity":"LOW","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":1.8,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-01T13:34:05.348945Z","id":"CVE-2026-41579","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-61"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*","versionEndExcluding":"1.3.6","matchCriteriaId":"66E8E6E0-E0A3-4C49-A418-D1CA76D0FAEF"},{"vulnerable":true,"criteria":"cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*","versionStartIncluding":"1.4.0","versionEndExcluding":"1.4.3","matchCriteriaId":"3692DBD2-9876-4C63-8C93-2262F86EF95A"},{"vulnerable":true,"criteria":"cpe:2.3:a:linuxfoundation:runc:1.5.0:rc1:*:*:*:*:*:*","matchCriteriaId":"2FEAC66F-F2B2-4B23-8061-3B8B44EAECD8"},{"vulnerable":true,"criteria":"cpe:2.3:a:linuxfoundation:runc:1.5.0:rc2:*:*:*:*:*:*","matchCriteriaId":"ED7FCB70-52A0-42C3-A10F-247FEF7AEC08"}]}]}],"references":[{"url":"https://github.com/opencontainers/runc/commit/864db8042dbb","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/opencontainers/runc/security/advisories/GHSA-xjvp-4fhw-gc47","source":"security-advisories@github.com","tags":["Mitigation","Patch","Vendor Advisory"]}]}