CVE Explorer
CVE-2026-39457
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
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unknown","modules":["libnv"],"product":"FreeBSD","vendor":"FreeBSD","versions":[{"lessThan":"p7","status":"affected","version":"15.0-RELEASE","versionType":"release"},{"lessThan":"p3","status":"affected","version":"14.4-RELEASE","versionType":"release"},{"lessThan":"p12","status":"affected","version":"14.3-RELEASE","versionType":"release"},{"lessThan":"p13","status":"affected","version":"13.5-RELEASE","versionType":"release"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:7f084de30a85aade391912debaf761afaa5ec1fb8bd5516fbc3a8bb415cccde9 · sha256:ff0d87dd035a29ff… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:7f084de30a85aade391912debaf761afaa5ec1fb8bd5516fbc3a8bb415cccde9 · sha256:ff0d87dd035a29ff… · /containers/adp/0/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-121","description":"CWE-121: Stack-based Buffer Overflow","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:7f084de30a85aade391912debaf761afaa5ec1fb8bd5516fbc3a8bb415cccde9 · sha256:ff0d87dd035a29ff… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"tags":["vendor-advisory"],"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:16.libnv.asc"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7f084de30a85aade391912debaf761afaa5ec1fb8bd5516fbc3a8bb415cccde9 · sha256:ff0d87dd035a29ff… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.