CVE-2026-4747

Katalog CVE

CVSS 8.8 · High EPSS 1,1%

Kerentanan Stack-based Buffer Overflow pada freebsd. Skor CVSS 3.1 8.8 (High) menurut CISA ADP.

Deskripsi (NVD)

Each RPCSEC_GSS data packet is validated by a routine which checks a signature in the packet. This routine copies a portion of the packet into a stack buffer, but fails to ensure that the buffer is sufficiently large, and a malicious client can trigger a stack overflow. Notably, this does not require the client to authenticate itself first. As kgssapi.ko's RPCSEC_GSS implementation is vulnerable, remote code execution in the kernel is possible by an authenticated user that is able to send packets to the kernel's NFS server while kgssapi.ko is loaded into the kernel. In userspace, applications which have librpcgss_sec loaded and run an RPC server are vulnerable to remote code execution from any client able to send it packets. We are not aware of any such applications in the FreeBSD base system.

Rincian

Terbit di NVD

26 Maret 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

8.8 (High), sumber CISA ADP
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-121: Stack-based Buffer Overflow

EPSS (30 hari)

1,1% peluang dieksploitasi; lebih tinggi dari 65,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://security.freebsd.org/advisories/FreeBSD-SA-26:08.rpcsec_gss.asc advisory vendor
• https://github.com/califio/publications/tree/main/MADBugs/CVE-2026-4747 exploit · advisory pihak ketiga
• https://github.com/califio/publications/blob/main/MADBugs/CVE-2026-4747/exploit.py exploit