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.
References
| Link | Resource |
|---|---|
| https://security.freebsd.org/advisories/FreeBSD-SA-26:16.libnv.asc | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
01 May 2026, 12:41
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Freebsd freebsd
Freebsd |
|
| CPE | cpe:2.3:o:freebsd:freebsd:13.5:p7:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p12:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p5:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p8:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:rc1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p6:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p9:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p4:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p11:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p10:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:beta3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p1:*:*:*:*:*:* |
|
| References | () https://security.freebsd.org/advisories/FreeBSD-SA-26:16.libnv.asc - Vendor Advisory |
30 Apr 2026, 15:09
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-04-30 09:16
Updated : 2026-05-01 12:41
NVD link : CVE-2026-39457
Mitre link : CVE-2026-39457
CVE.ORG link : CVE-2026-39457
JSON object : View
Products Affected
freebsd
- freebsd
CWE
CWE-121
Stack-based Buffer Overflow