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.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
References 8
https://git.kernel.org/stable/c/6ab3128292df67295de1b2a86f21d89cf6612a7e
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/80d4e40a85ba524e66c8c748aa7bb19eaf2f69df
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ab6b1ad710bed7931540733ce145493fece8ceef
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/ceb6ac43b0f591722401922ceb958ce2616935e0
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/035cc6bc4d412dd4302862e8f859b784fcd4653b
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/1321a4e6247164312eabc6d07f88572da2ee308c
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6f0ce09d60a0e4fab6f9ebe8294750481f0c19dd
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/dc1dc2837f8e53bde2f16d52a63f4142e21757f1
416baaa9-dc9f-4396-8d5f-8c081fb06d67