CVE-2026-90304
N/A
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | c6e61c06d6061750597e79c598acb5dead44c35b < 8d7cbc6df9632d334b21c4be66ccdde76a08fb13 | affected |
| Linux | Linux | c6e61c06d6061750597e79c598acb5dead44c35b < e79ca91165d4fd18549c536abdb86101e889052f | affected |
| Linux | Linux | 7.1 | affected |
| Linux | Linux | 0 < 7.1 | unaffected |
| Linux | Linux | 7.2.6 <= 7.2.* | unaffected |
| Linux | Linux | 7.3-rc1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/8d7cbc6df9632d334b21c4be66ccdde76a08fb13
- https://git.kernel.org/stable/c/e79ca91165d4fd18549c536abdb86101e889052f
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