CVE-2026-63955
kernel: mm/vmalloc: do not trigger BUG() on BH disabled context
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 19, 2026
Updated · November 5, 2026
Description
A flaw was found in the Linux kernel's memory management. This vulnerability could lead to a system crash, making the system unavailable. The issue arises from an incorrect check within the kernel's virtual memory allocation process, which mistakenly triggers a system halt under certain conditions. An attacker could potentially exploit this flaw to cause a Denial of Service (DoS).
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 · 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-617 · Reachable Assertion