Description
In the Linux kernel, the following vulnerability has been resolved:
ARM: 9484/1: enable interrupts when unhandled user faults are triggered
PREEMPT_RT requires interrupts to be enabled when sending signals.
When do_DataAbort()/do_PrefetchAbort() triggers unhandled user faults, that is `inf->fn()` return a non-zero value, and the interrupts are not enabled within the hook function, force_sig_fault() will be called with interrupts disabled.
This can be triggered by user programs executing the bkpt instruction, with kernel config CONFIG_PERF_EVENTS=n.
Enable interrupts in do_DataAbort()/do_PrefetchAbort() when unhandled user faults are triggered to fix the issue.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= c6e61c06d6061750597e79c598acb5dead44c35b, < 8d7cbc6df9632d334b21c4be66ccdde76a08fb13; >= c6e61c06d6061750597e79c598acb5dead44c35b, < e79ca91165d4fd18549c536abdb86101e889052f |
| Linux | Linux | 7.1 |
References
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received