CVE-2026-4747 is a critical stack-based buffer overflow vulnerability (CWE-121) in the RPCSEC_GSS implementation, affecting the FreeBSD kernel (kgssapi.ko) and potentially userspace RPC applications. Rated 8.8 HIGH (CVSSv3.1), it allows an authenticated network attacker with low privileges to achieve remote code execution (RCE) in the kernel due to insufficient buffer validation during packet processing. While not yet on the CISA KEV list, this vulnerability is on the "Hot List" and has garnered significant community attention, with public reports and discussions indicating the existence of a proof-of-concept for remote kernel RCE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
13.5CPE matchmatch criteria | cpe:2.3:o:freebsd:freebsd:13.5:-:*:*:*:*:*:* | ||
13.5CPE matchmatch criteria | cpe:2.3:o:freebsd:freebsd:13.5:beta3:*:*:*:*:*:* | ||
13.5CPE matchmatch criteria | cpe:2.3:o:freebsd:freebsd:13.5:p1:*:*:*:*:*:* | ||
13.5CPE matchmatch criteria | cpe:2.3:o:freebsd:freebsd:13.5:p10:*:*:*:*:*:* | ||
13.5CPE matchmatch criteria | cpe:2.3:o:freebsd:freebsd:13.5:p2:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.