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CVE-2025-52565— container escape due to /dev/console mount and related races

Quick assessment

Affected
opencontainers runc
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

runc是Open Container Initiative开源的一款用于根据OCI规范生成和运行容器的CLI（命令行界面）工具。 runc 1.0.0-rc3版本至1.2.7版本、1.3.0-rc.1版本至1.3.2版本和1.4.0-rc.1版本至1.4.0-rc.2版本存在安全漏洞，该漏洞源于绑定挂载/dev/pts/$n到/dev/console时检查不足，可能导致拒绝服务或容器逃逸。

AI Predicted 8.8 Difficulty: Easy EPSS 0.56% · P45
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I. Basic Information for CVE-2025-52565

Vulnerability Information
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Vulnerability Title
container escape due to /dev/console mount and related races
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-61
Source: CVE Program / CVE List V5
Vulnerability Title
runc 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
runc是Open Container Initiative开源的一款用于根据OCI规范生成和运行容器的CLI（命令行界面）工具。 runc 1.0.0-rc3版本至1.2.7版本、1.3.0-rc.1版本至1.3.2版本和1.4.0-rc.1版本至1.4.0-rc.2版本存在安全漏洞，该漏洞源于绑定挂载/dev/pts/$n到/dev/console时检查不足，可能导致拒绝服务或容器逃逸。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
opencontainers runc >= 1.0.0-rc3, < 1.2.8 -

II. Public POCs for CVE-2025-52565

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III. Intelligence Information for CVE-2025-52565

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Patches & Fixes for CVE-2025-52565 (1)

Vendor Advisories for CVE-2025-52565 (1)

Same Patch Batch · opencontainers · 2025-11-06 · 3 CVEs total

CVE-2025-31133 runc container escape via "masked path" abuse due to mount race conditions
CVE-2025-52881 runc: LSM labels can be bypassed with malicious config using dummy procfs files

IV. Related Vulnerabilities

Same product: runc
Same vendor: opencontainers
Same weakness: CWE-61

V. Comments for CVE-2025-52565

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