CVE-2026-49419

Katalog CVE

CVSS 8.8 · High EPSS 0,47%

Kerentanan Improper Update of Reference Count pada freebsd. Skor CVSS 3.1 8.8 (High) menurut CISA ADP.

Deskripsi (NVD)

When the JAIL_AT_DESC flag is specified, kern_jail_set() and kern_jail_get() released the reference to the caller's current prison before looking up the jail descriptor. If the descriptor lookup failed, error-handling paths released the same reference a second time. An unprivileged local user can trigger a prison reference count underflow, which may cause the prison structure to be freed while still in use. When this is done on the jail host, the bug will generally result in an immediate panic. However, if the user is running in a jail, then it may be possible to exploit the bug to elevate privileges.

Rincian

Terbit di NVD

19 Agustus 2026

Terakhir diubah

1 September 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-911: Improper Update of Reference Count

EPSS (30 hari)

0,47% peluang dieksploitasi; lebih tinggi dari 38,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://security.freebsd.org/advisories/FreeBSD-SA-26:38.jail.asc advisory vendor