Singluarity ineffectively applies of selinux / apparmor LSM process labels

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Summary

CVECVE-2025-64750
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-02 18:15:48 UTC
Updated2026-10-18 18:10:00 UTC
DescriptionSingularityCE and SingularityPRO are open source container platforms. Prior to SingularityCE 4.3.5 and SingularityPRO 4.1.11 and 4.3.5, if a user relies on LSM restrictions to prevent malicious operations then, under certain circumstances, an attacker can redirect the LSM label write operation so that it is ineffective. The attacker must cause the user to run a malicious container image that redirects the mount of /proc to the destination of a shared mount, either known to be configured on the target system, or that will be specified by the user when running the container. The attacker must also control the content of the shared mount, for example through another malicious container which also binds it, or as a user with relevant permissions on the host system it is bound from. This vulnerability is fixed in SingularityCE 4.3.5 and SingularityPRO 4.1.11 and 4.3.5.

Risk And Classification

Primary CVSS: v3.1 4.5 MEDIUM from [email protected]

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

EPSS: 0.001600000 probability, percentile 0.047940000 (date 2026-10-18)

Problem Types: CWE-61 | CWE-706 | CWE-61 CWE-61: UNIX Symbolic Link (Symlink) Following | CWE-706 CWE-706: Use of Incorrectly-Resolved Name or Reference

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.5MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
3.1CNADECLARED4.5MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Sylabs Singularity affected > 4.2.0-rc.1, < 4.3.5 Not specified
CNA Sylabs Singularity affected < 4.1.11 Not specified

References

ReferenceSourceLinkTags
github.com/sylabs/singularity/security/advisories/GHSA-wwrx-w7c9-rf87 [email protected] github.com
github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prm [email protected] github.com
github.com/sylabs/singularity/commit/5af3e790c40593591dfc26d0692e4d4b21c... [email protected] github.com
github.com/sylabs/singularity/pull/3850 [email protected] github.com
github.com/advisories/GHSA-fh74-hm69-rqjw [email protected] github.com
github.com/sylabs/singularity/commit/27882963879a7af1699fd6511c3f5f1371d... [email protected] github.com
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