CVE-2026-46281
kernel: vmalloc: fix buffer overflow in vrealloc_node_align()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · June 8, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel. When shrinking a vmalloc allocation using the vrealloc_node_align function, if the requested new size is smaller than the old size, an out-of-bounds write can occur. This memory corruption vulnerability could allow a local attacker to cause a denial of service or potentially escalate privileges.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-787 · Out-of-bounds Write