CVE-2026-89469 power: supply: lp8727: fix use-after-free in lp8727_release_irq()
A use-after-free in the Linux kernel lp8727 power supply driver allows attackers to cause denial of service or execute code via race conditions during device removal.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-89469?
CVE-2026-89469 is a high-severity use after free vulnerability in Linux, published on 11 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
power: supply: lp8727: fix use-after-free in lp8727_release_irq()
lp8727_isr_func(), the threaded IRQ handler, is the only caller that arms pchg->work via schedule_delayed_work(). lp8727_release_irq() currently cancels the work before freeing the IRQ, so an IRQ delivered in between can re-arm the work through the threaded handler. After .remove returns the devm layer frees pchg while lp8727_delayed_func() may still run and dereference it.
Free the IRQ first so the threaded handler is quiesced and can no longer queue work, then cancel the delayed work to drain the final generation.
This issue was found by an in-house static analysis tool.
Which versions are affected by CVE-2026-89469?
How do I fix CVE-2026-89469?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-89469 being exploited?
There is no known exploitation of CVE-2026-89469 in the wild and no public exploit code.
Sources
Also known as AZL-100229, BELL-CVE-2026-89469, DEBIAN-CVE-2026-89469, GHSA-69w5-534x-wxxj, UBUNTU-CVE-2026-89469.