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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.
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OR
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc7:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc6:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc5:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc4:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc3:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc8:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc9:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc90:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc91:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc92:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc93:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc94:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.0.0:rc95:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:* versions from (including) 1.0.1 up to (excluding) 1.2.8
*cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:* versions from (including) 1.3.0 up to (excluding) 1.3.3
*cpe:2.3:a:linuxfoundation:runc:1.4.0:rc1:*:*:*:*:*:*
*cpe:2.3:a:linuxfoundation:runc:1.4.0:rc2:*:*:*:*:*:*
GitHub, Inc.: https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7r Types: Exploit, Mitigation, Patch, Third Party Advisory
New CVE Received from GitHub, Inc.11/06/2025 3:15:49 PM
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Description
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.
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