Vulnerability 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.
References
- https://git.kernel.org/stable/c/8d7cbc6df9632d334b21c4be66ccdde76a08fb13
- https://git.kernel.org/stable/c/e79ca91165d4fd18549c536abdb86101e889052f
FAQ
What is CVE-2026-90304?
CVE-2026-90304 is a documented vulnerability. 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 ...
How severe is CVE-2026-90304?
CVSS scoring is not yet available for CVE-2026-90304. Check NVD for updates.
Is there a patch for CVE-2026-90304?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.