CVE-2025-52565: Linuxfoundation Runc vulnerability (CVSS 7.5)

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 3.1 breakdown

Attack vectorLocal

Attack complexityHigh

Privileges requiredLow

User interactionRequired

ScopeChanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

Linuxfoundation Runc≥ 1.0.1 < 1.2.8 · ≥ 1.3.0 < 1.3.3 · 1.0.0 · 1.4.0

Remediation

Fixed in

Linuxfoundation Runc≥ 1.2.8

Patch & vendor advisories

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-52565 being actively exploited?

CVE-2025-52565 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.57%.

How severe is CVE-2025-52565?

CVE-2025-52565 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.57% probability of exploitation.

Which products are affected by CVE-2025-52565?

Affected products include Linuxfoundation Runc.

How do I fix CVE-2025-52565?

Upgrade affected software to a fixed version, for example Linuxfoundation Runc 1.2.8 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-52565 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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