clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 6.18.50, 7.2.4
- 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: clocksource/drivers/nxp-pit: Fix IRQ leak on cpuhp_setup_state error path When cpuhp_setup_state fails after pit_clockevent_per_cpu_init has successfully called request_irq, the error handling jumps directly to out_pit_clocksource_unregister without freeing the registered IRQ. This leaks the IRQ line and, since kfree(pit) follows, leaves a dangling pointer registered as the interrupt handler's dev_id, potentially leading to a use-after-free if the IRQ fires afterwards. Fix it by calling pit_clockevent_per_cpu_exit to properly release the IRQ before falling through to the existing cleanup chain.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From bee33f22d7c30626e711b4900e3f460b6e0e104f · fixed in d53c29a89a15e56a1797f3ef249955e544782e04; From bee33f22d7c30626e711b4900e3f460b6e0e104f · fixed in cdcd861123248e871c2ec2be968b0a1b2a5a34b0; From bee33f22d7c30626e711b4900e3f460b6e0e104f · fixed in 05520e035f8332c8e33f3011b5ca016fde61793d
- Linux Linux
6.18
- KernelLinux
From 6.18.0 · fixed in 6.18.50; From 6.19.0 · fixed in 7.2.4