CVE-2026-49416

7.8 Élevée

Publiée le 27/06/2026 à 12:16 · Modifiée le 01/07/2026 à 16:04 · Analysée par le NVD · Source : secteam@freebsd.org

Description

The CONS_HISTORY ioctl handler did not adequately validate the requested history size. A large value caused an integer overflow in the buffer size calculation, resulting in a heap allocation smaller than expected. Subsequent initialization of the buffer wrote beyond the end of the allocation. An unprivileged local user with access to a vt(4) device can trigger an out-of-bounds write in the kernel, potentially escalating privileges.

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Produits concernés

FreeBSD
Freebsd freebsd

Scores CVSS

Version	Score	Source	Vecteur
3.1	7.8 Élevée	134c704f-9b21-4f2e-91b3-4a467353bcc0	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

Faiblesses (CWE)

CWE-190

Références

https://security.freebsd.org/advisories/FreeBSD-SA-26:34.vt.asc Vendor Advisory

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories