Name: CVE-2026-49428: Improperly Controlled Modification of Dynamically-Determined Object Attributes
Creator: Rapid7
Published: 2026-08-19T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-49428, CWE-915, CVSS 8.4, EPSS 0.00341

Certain system calls, such open(2) with the O_TRUNC flag set, and fspacectl(2), could incorrectly free memory in largepage objects. These operations are not permitted on largepage objects, but the implementation did not verify this.

An unprivileged local user can abuse the bug to access freed kernel memory. This can be exploited to escalate privileges.

CVSS Details

CVSS 3.1 Base Score: 8.4
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Freebsd	—	Upgrade FreeBSD	Jul 1, 2026	Jul 1, 2026

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CVSS Details

Covered by Rapid7

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