CVE-2026-90304
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.
How to fix
- Linux Linux8d7cbc6df9632d334b21c4be66ccdde76a08fb13, e79ca91165d4fd18549c536abdb86101e889052f or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | c6e61c06d6061750597e79c598acb5dead44c35b ≤ v < 8d7cbc6df9632d334b21c4be66ccdde76a08fb13, c6e61c06d6061750597e79c598acb5dead44c35b ≤ v < e79ca91165d4fd18549c536abdb86101e889052f, 7.1 | 8d7cbc6df9632d334b21c4be66ccdde76a08fb13, e79ca91165d4fd18549c536abdb86101e889052f |
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