CVEvulnerability

CVE-2026-39457

7.8 HIGH Published 2026-04-30 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-04-30
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-121

Description

When exchanging data over a socket, libnv uses select(2) to wait for data to arrive. However, it does not verify whether the provided socket descriptor fits in select(2)'s file descriptor set size limit of FD_SETSIZE (1024). An attacker who is able to force a libnv application to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, can trigger stack corruption. If the target application is setuid-root, then this could be used to elevate local privileges.

Affected configurations

• freebsd freebsd 13.5 • freebsd freebsd 14.3 • freebsd freebsd 14.4 • freebsd freebsd 15.0

Related

Weakness · CWE (1)

  • CWE-121 Stack-based Buffer Overflow weakness

References