CVE Database›Document archive›CVE-2026-63955

CVE-2026-63955

kernel: mm/vmalloc: do not trigger BUG() on BH disabled context

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Severity

Important

Red Hat Product Security

7.5

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 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-617 · Reachable Assertion