CVE-2026-35547

Heap overflow in libnv

State: Published
Severity: 8.1 High
Published: Apr 30, 2026
Updated: May 1, 2026
Reserved: Apr 28, 2026

Description

When processing the header of an incoming message, libnv failed to properly validate the message size.

The lack of validation allows a malicious program to write outside the bounds of a heap allocation. This can trigger a crash or system panic, and it may be possible for an unprivileged user to exploit the bug to elevate their privileges.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-122 Heap-based Buffer Overflow
CWE-130 Improper Handling of Length Parameter Inconsistency

Affected Products

Product	Versions
FreeBSDFreeBSD	15.0-RELEASE to before p7Affected 14.4-RELEASE to before p3Affected 14.3-RELEASE to before p12Affected 13.5-RELEASE to before p13Affected

References

https://security.freebsd.org/advisories/FreeBSD-SA-26:17.libnv.ascvendor-advisory

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