Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c6e61c06d6061750597e79c598acb5dead44c35b before 8d7cbc6df9632d334b21c4be66ccdde76a08fb13; affected c6e61c06d6061750597e79c598acb5dead44c35b before e79ca91165d4fd18549c536abdb86101e889052f |
| Linux / Linux | affected 7.1; unaffected 0 before 7.1; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.