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Vulnerability record · CVE-2025-52565 · published 6 November 2025

CVE-2025-52565: Linuxfoundation runc vulnerability

Linuxfoundation · Runc

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.

8.4 CVSS 4.0 High EPSS 0.57% · top 55.3% CWE-61 · CWE-61CWE-363 · CWE-363
8.4CVSS 4.0 base score
0.57%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/opencontainers/runc/commit/01de9d65dc72f67b256ef03f9bfb795a2bf143b4 Patch
https://github.com/opencontainers/runc/commit/398955bccb7f20565c224a3064d331c19e422398 Patch
https://github.com/opencontainers/runc/commit/531ef794e4ecd628006a865ad334a048ee2b4b2e Patch
https://github.com/opencontainers/runc/commit/9be1dbf4ac67d9840a043ebd2df5c68f36705d1d Patch
https://github.com/opencontainers/runc/commit/aee7d3fe355dd02939d44155e308ea0052e0d53a Patch
https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64 Patch
https://github.com/opencontainers/runc/commit/de87203e625cd7a27141fb5f2ad00a320c69c5e8 Patch
https://github.com/opencontainers/runc/commit/ff94f9991bd32076c871ef0ad8bc1b763458e480 Patch
https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7r ExploitMitigationPatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2025-52565), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.