CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: има публичен пример за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
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.
Засегнати продукти
- FreeBSD FreeBSD: 15.0-RELEASE преди p5; 14.4-RELEASE преди p1; 14.3-RELEASE преди p10; 13.5-RELEASE преди p11
Вид слабост
История
- 26 март 2026 Публикувано
Други уязвимости в FreeBSD FreeBSD
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-4747
- https://nvd.nist.gov/vuln/detail/CVE-2026-4747
- https://security.freebsd.org/advisories/FreeBSD-SA-26:08.rpcsec_gss.asc
- https://github.com/califio/publications/blob/main/MADBugs/CVE-2026-4747/exploit.py
- https://github.com/califio/publications/tree/main/MADBugs/CVE-2026-4747