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CVE-2026-45254

Incorrect libcap_net limitation list manipulation

Published: May 21, 2026Updated: May 21, 2026 Sources: CVE List NVD
NVD MITRE
6.5CVSS
MEDIUM

In the case of the cap_net service, when a key present in the old limit was omitted from the new limit, the missing key was treated as "allow any" instead of being rejected. In certain scenarios, an application that had previously restricted a subset of network operations could ask for a new limit that extended the permissions of the process.

EPSS Score
0.0%
Top 97.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None

Weaknesses

CWE-269

Affected Products

FreeBSD
FreeBSD

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://security.freebsd.org/advisories/FreeBSD-SA-26:24.cap_net.asc
security.freebsd.org

Timeline

Published
May 21, 2026
Last Updated
May 21, 2026

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