CVE-2026-98900
kernel: xen/gntalloc: validate grant count before allocation
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 27, 2026
Description
A flaw was found in the Linux kernel's Xen grant allocation driver. A local user can exploit this vulnerability by submitting an excessively large grant allocation request before the driver validates it against global limits. This flaw allows excessive kernel memory consumption and integer wrapping, leading to system instability or 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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-770 · Allocation of Resources Without Limits or Throttling