NULL pointer dereference in Linux
CVE-2025-21965
In the Linux kernel, the following vulnerability has been resolved: sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl() If a BPF scheduler provides an invalid CPU (outside the nr_cpu_ids range) as prev_cpu to scx_bpf_select_cpu_dfl() it can cause a kernel crash. To prevent this, validate prev_cpu in scx_bpf_select_cpu_dfl() and trigger an scx error if an invalid CPU is specified.
EPSS: 0.002 (7.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux — versions f0e1a0643a59bf1f922fa209cec86a170b784f3f, 6.12, 0
- Linux Linux_kernel — versions 6.14
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-21965?
- CVE-2025-21965 is a high-severity vulnerability in Linux, classified under NULL Pointer Dereference. CVSS score: 7.8/10. Published 2025-04-01.
- How severe is CVE-2025-21965?
- High severity. CVSS v3 base score is 7.8 out of 10.