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High severity7.8NVD Advisory· Published Apr 1, 2025· Updated Jul 30, 2026

CVE-2025-21965

CVE-2025-21965

Description

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.

Affected products

10

Linux/Kernel9 versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 8 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=6.12,<6.12.20
- cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.14:rc6:*:*:*:*:*:*
- (no CPE)
- (no CPE)range: 6.12
osv-coords
pkg:linux/kernel
Range: >= 6.12.0, < 6.12.20

Patches

Vulnerability mechanics

References

3

News mentions

0

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