{"id":"UBUNTU-CVE-2025-52565","details":"runc is a CLI tool for spawning and running containers according to the OCI specification. Versions 1.0.0-rc3 through 1.2.7, 1.3.0-rc.1 through 1.3.2, and 1.4.0-rc.1 through 1.4.0-rc.2, due to insufficient checks when bind-mounting `/dev/pts/$n` to `/dev/console` inside the container, an attacker can trick runc into bind-mounting paths which would normally be made read-only or be masked onto a path that the attacker can write to. This attack is very similar in concept and application to CVE-2025-31133, except that it attacks a similar vulnerability in a different target (namely, the bind-mount of `/dev/pts/$n` to `/dev/console` as configured for all containers that allocate a console). This happens after `pivot_root(2)`, so this cannot be used to write to host files directly -- however, as with CVE-2025-31133, this can load to denial of service of the host or a container breakout by providing the attacker with a writable copy of `/proc/sysrq-trigger` or `/proc/sys/kernel/core_pattern` (respectively). This issue is fixed in versions 1.2.8, 1.3.3 and 1.4.0-rc.3.","modified":"2026-01-30T01:33:04.642678Z","published":"2025-11-05T09:00:00Z","related":["USN-7851-1"],"upstream":["CVE-2025-52565"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-52565"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-52565"},{"type":"REPORT","url":"https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7r"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7851-1"}],"affected":[{"package":{"name":"runc","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/runc@1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.0.8+dfsg-2","0.1.1-0ubuntu5~16.04","1.0.0~rc1-0ubuntu1~16.04","1.0.0~rc1-0ubuntu2~16.04.1","1.0.0~rc1-0ubuntu2~16.04.1.1","1.0.0~rc2-0ubuntu2~16.04.1","1.0.0~rc2+docker1.12.6-0ubuntu1~16.04.1","1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.1","1.0.0~rc2+docker1.13.1-0ubuntu1~16.04.2","1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.3","1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4","1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm1","1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2","1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-opencontainers-runc-dev","binary_version":"1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4"},{"binary_name":"runc","binary_version":"1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm4"}],"priority_reason":"runc 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