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vulnrichmentLinuxVULNRICHMENT:CVE-2023-52498
HistoryFeb 29, 2024 - 3:52 p.m.

CVE-2023-52498 PM: sleep: Fix possible deadlocks in core system-wide PM code

2024-02-2915:52:14
Linux
github.com
1
linux kernel
vulnerability
fix
sleep
deadlock
low-memory
asynchronous
mutex

AI Score

6.8

Confidence

Low

SSVC

Exploitation

none

Automatable

no

Technical Impact

partial

In the Linux kernel, the following vulnerability has been resolved:

PM: sleep: Fix possible deadlocks in core system-wide PM code

It is reported that in low-memory situations the system-wide resume core
code deadlocks, because async_schedule_dev() executes its argument
function synchronously if it cannot allocate memory (and not only in
that case) and that function attempts to acquire a mutex that is already
held. Executing the argument function synchronously from within
dpm_async_fn() may also be problematic for ordering reasons (it may
cause a consumer device’s resume callback to be invoked before a
requisite supplier device’s one, for example).

Address this by changing the code in question to use
async_schedule_dev_nocall() for scheduling the asynchronous
execution of device suspend and resume functions and to directly
run them synchronously if async_schedule_dev_nocall() returns false.

AI Score

6.8

Confidence

Low

SSVC

Exploitation

none

Automatable

no

Technical Impact

partial