ARM: 9484/1: enable interrupts when unhandled user faults are triggered
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 7.2.6
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From c6e61c06d6061750597e79c598acb5dead44c35b · fixed in 8d7cbc6df9632d334b21c4be66ccdde76a08fb13; From c6e61c06d6061750597e79c598acb5dead44c35b · fixed in e79ca91165d4fd18549c536abdb86101e889052f
- Linux Linux
7.1
- KernelLinux
From 7.1.0 · fixed in 7.2.6