CVE-2025-21965 (GCVE-0-2025-21965)

Vulnerability from cvelistv5 – Published: 2025-04-01 15:47 – Updated: 2026-05-11 21:09
VLAI
Title
sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl()
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f0e1a0643a59bf1f922fa209cec86a170b784f3f , < 752b56bb76e2471197d25d6948d85753043b10da (git)
Affected: f0e1a0643a59bf1f922fa209cec86a170b784f3f , < 515680e76c536dd4aa8e2b5d674b0d441baddf5b (git)
Affected: f0e1a0643a59bf1f922fa209cec86a170b784f3f , < 9360dfe4cbd62ff1eb8217b815964931523b75b3 (git)
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Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.20 , ≤ 6.12.* (semver)
Unaffected: 6.13.8 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
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      "title": "kernel: sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl()",
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}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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