Answer in brief
CVE-2025-21965 records a Unknown severity vulnerability in sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f0e1a0643a59bf1f922fa209cec86a170b784f3f <752b56bb76e2471197d25d6948d85753043b10da || >=f0e1a0643a59bf1f922fa209cec86a170b784f3f <515680e76c536dd4aa8e2b5d674b0d441baddf5b || >=f0e1a0643a59bf1f922fa209cec86a170b784f3f <9360dfe4cbd62ff1eb8217b815964931523b75b3 | 752b56bb76e2471197d25d6948d85753043b10da, 515680e76c536dd4aa8e2b5d674b0d441baddf5b, 9360dfe4cbd62ff1eb8217b815964931523b75b3 |
| Linux/Linuxgeneric | 6.12 | Not reported |
Published upstream
Apr 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-21965 records a Unknown severity vulnerability in sched_ext: Validate prev_cpu in scx_bpf_select_cpu_dfl(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f0e1a0643a59bf1f922fa209cec86a170b784f3f <752b56bb76e2471197d25d6948d85753043b10da || >=f0e1a0643a59bf1f922fa209cec86a170b784f3f <515680e76c536dd4aa8e2b5d674b0d441baddf5b || >=f0e1a0643a59bf1f922fa209cec86a170b784f3f <9360dfe4cbd62ff1eb8217b815964931523b75b3 | 752b56bb76e2471197d25d6948d85753043b10da, 515680e76c536dd4aa8e2b5d674b0d441baddf5b, 9360dfe4cbd62ff1eb8217b815964931523b75b3 |
| Linux/Linuxgeneric | 6.12 | Not reported |
Published upstream
Apr 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.