Answer in brief
CVE-2026-90317 records a High severity (CVSS 7.8) vulnerability in bpf: Invalidate RCU pointers after final spin unlock. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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.
CVSS is 7.8. 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5861d1e8dbc4e1a03ebffb96ac041026cdd34c07 <7ae71629357d0a6d0bdadb929c7b296d5b7e61c2 || >=5861d1e8dbc4e1a03ebffb96ac041026cdd34c07 <180c7000712db77063b3a26f4c97e7dd9038f449 | 7ae71629357d0a6d0bdadb929c7b296d5b7e61c2, 180c7000712db77063b3a26f4c97e7dd9038f449 |
| Linux/Linuxgeneric | 6.6 | Not reported |
| Linux/Linuxgeneric | >=5861d1e8dbc4e1a03ebffb96ac041026cdd34c07 <f81972b235f3ebfa40bdce8bcfee3f242fb24065 || >=5861d1e8dbc4e1a03ebffb96ac041026cdd34c07 <7ae71629357d0a6d0bdadb929c7b296d5b7e61c2 || >=5861d1e8dbc4e1a03ebffb96ac041026cdd34c07 <180c7000712db77063b3a26f4c97e7dd9038f449 | f81972b235f3ebfa40bdce8bcfee3f242fb24065, 7ae71629357d0a6d0bdadb929c7b296d5b7e61c2, 180c7000712db77063b3a26f4c97e7dd9038f449 |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: bpf: Invalidate RCU pointers after final spin unlock In a sleepable BPF program, a spin lock can provide the only RCU protection for a kptr. The final bpf_spin_unlock() ends that protection, but the verifier leaves the pointer valid. Another CPU can then free the object before the pointer is used. A capability-limited runtime PoC triggered a task_struct use-after-free in __bpf_get_task_stack(). Record whether the program is in an RCU-protected context before releasing the lock. Invalidate RCU-protected pointers only when the unlock leaves the final such context. This preserves valid pointers in non-sleepable programs and inside an explicit RCU read-side section.
Quoted source text, attributed separately from HOL analysis.