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Vulnerabilities CVE-2025-21965

CVE-2025-21965

High
Open
TLP:CLEAR

sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl()

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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.

Details

CVSS Score
7.8
EPSS Score
0.19%

8.7th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Confidence
90%
Published
Apr 1, 2025
Last Modified
Aug 5, 2026
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