CVE-2026-98150
kernel: bpf: Fix BPF_F_CPU validation for sparse CPU IDs
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 25, 2026
Updated · September 29, 2026
Description
A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. A local user could trigger a Denial of Service (DoS) by providing an invalid processor identifier during per-CPU map operations on systems with non-contiguous CPU configurations. Due to improper validation of CPU flags, the kernel attempts an invalid memory access, leading to a kernel crash.
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-787 · Out-of-bounds Write