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Runc CVE-2025-52565

HIGH
UNIX Symbolic Link (Symlink) Following (CWE-61)
2025-11-06 security-advisories@github.com
Denial Of Service Red Hat Suse Runc Linuxfoundation
8.4
CVSS 4.0 · GitHub Advisory
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Vulnerability Assessment

Weakness
CWE
CWE-61
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling UNIX symlink resolution
Impact

CVSS score of 8.4 (HIGH). Attack characteristics: local attack vector, low complexity, no privileges required, user interaction required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 0.03%.
Exploit ScenarioDerived

Successful exploitation could compromise the high-severity affected system.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

runc is a CLI tool for spawning and running containers according to the OCI specification. Rated high severity (CVSS 8.4), this vulnerability is no authentication required, low attack complexity. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

go github.com/opencontainers/runc fix: 1.2.8, 1.3.3, 1.4.0-rc.3

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in go

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Technical ContextAI · show details

This vulnerability is classified under CWE-61. 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. Affected products include: Linuxfoundation Runc. Version information: through 1.2.7.

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Severity by source

GitHub Advisory PRIMARY 8.4 HIGH
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
SUSE 7.5 HIGH
AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
Red Hat 8.2 HIGH

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Passive
Vulnerable system: Confidentiality
None
Vulnerable system: Integrity
High
Vulnerable system: Availability
None
Subsequent system: Confidentiality
High
Subsequent system: Integrity
High
Subsequent system: Availability
High

Lifecycle Timeline

3
Patch released
Mar 28, 2026 - 19:20 nvd
Patch available
PoC Detected
Dec 03, 2025 - 18:33 vuln.today
Public exploit code
CVE Published
Nov 06, 2025 - 20:15 nvd
HIGH 8.4

DescriptionGitHub Advisory

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.

Executive ViewAI

Why It Matters

Organizations using runc face notable risk from CVE-2025-52565 rated CVSS 8.4. Successful exploitation could significantly impact the confidentiality, integrity, or availability of affected systems. Proof-of-concept code is publicly available, increasing the risk of exploitation. A patch is available and should be applied as part of regular vulnerability management.

Business Impact: High
Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

EPSS Score
0.0%
Top 91% exploitable
Exploit
POC
Public exploit code exists
Data Quality
5 sources
Confidence: Medium
NVD CVE.org EPSS Vendor GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC Yes
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Small
Automatable· derived
No
Human Impact
High

Priority Score

62
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +42
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)GitHub Advisory

cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:runc:1.0.0:rc3:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:runc:1.0.0:rc4:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:runc:1.0.0:rc5:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:runc:1.0.0:rc6:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:runc:1.0.0:rc7:*:*:*:*:*:*
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:1.4.0:rc1:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:runc:1.4.0:rc2:*:*:*:*:*:*

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Same weakness CWE-61 – UNIX Symbolic Link (Symlink) Following

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8.4
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Same technique Denial Of Service

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Vendor StatusVendor

SUSE

Severity: High
Product Status
Container suse/sl-micro/6.0/baremetal-os-container:2.1.3-6.99 Affected
Container suse/sl-micro/6.0/base-os-container:2.1.3-5.7 Image SL-Micro Affected
Container suse/sl-micro/6.0/toolbox:latest Affected
Container suse/sl-micro/6.1/baremetal-os-container:2.2.1-7.29 Affected
Container suse/sl-micro/6.1/base-os-container:2.2.0-4.57 Affected

References

Advisories & patches
PATCH 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 ADVISORY https://access.redhat.com/errata/RHSA-2025:19927 ADVISORY https://access.redhat.com/errata/RHSA-2025:20957 ADVISORY https://access.redhat.com/errata/RHSA-2025:21232 ADVISORY https://access.redhat.com/errata/RHSA-2025:21795 ADVISORY https://access.redhat.com/errata/RHSA-2025:21824 ADVISORY https://access.redhat.com/errata/RHSA-2025:22275 ADVISORY https://access.redhat.com/errata/RHSA-2025:23078 ADVISORY https://access.redhat.com/errata/RHSA-2025:23079 ADVISORY https://access.redhat.com/errata/RHSA-2025:23080 ADVISORY https://access.redhat.com/errata/RHSA-2025:23113 ADVISORY https://access.redhat.com/errata/RHSA-2025:23202 ADVISORY https://access.redhat.com/errata/RHSA-2025:23204 ADVISORY https://access.redhat.com/errata/RHSA-2025:23205 ADVISORY https://access.redhat.com/errata/RHSA-2025:23209 ADVISORY https://access.redhat.com/errata/RHSA-2025:23449 ADVISORY https://access.redhat.com/errata/RHSA-2026:0315 ADVISORY https://access.redhat.com/errata/RHSA-2026:0331 ADVISORY https://access.redhat.com/errata/RHSA-2026:0418 ADVISORY https://access.redhat.com/errata/RHSA-2026:0425 ADVISORY https://access.redhat.com/errata/RHSA-2026:0676 ADVISORY https://access.redhat.com/errata/RHSA-2026:0701 ADVISORY https://access.redhat.com/errata/RHSA-2026:0995 ADVISORY https://access.redhat.com/errata/RHSA-2026:1540 ADVISORY https://access.redhat.com/errata/RHSA-2026:3461 ADVISORY https://access.redhat.com/errata/RHSA-2026:3462 ADVISORY https://access.redhat.com/errata/RHSA-2026:4531 ADVISORY https://access.redhat.com/errata/RHSA-2026:4693 ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:21036/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:21038/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:21054/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:21072/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:21136/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:3950/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:3951/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:4073/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:4077/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:4079/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:4080/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:4081/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0327/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20103/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20116/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20123/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20214/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20626/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:20641/

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