CVE-2026-98938: vulnerability in Linux
rust: irq: pass RegistrationInner as cookie to request_irq
Published
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 95% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
rust: irq: pass RegistrationInner as cookie to request_irq
With commit ba268514ea14 ("rust: devres: fix race condition due to
nesting"), Devres::new() returns Result<Self> by value instead of
initializing in-place via PinInit. Because request_irq() is called
inside Devres::new(), registration.inner is still uninitialized when the
IRQ is enabled, so accessing registration.inner.device() in the IRQ
callback can read uninitialized memory.
Fix this by storing the Device and handler pointer in RegistrationInner
and passing RegistrationInner as the IRQ cookie after its fields are
initialized.
This is not needed in mainline because commit 98c63ce4d760 ("rust: irq:
make Registration compatible with lifetime-bound drivers") removed
Devres from irq::Registration and moved request_irq() after all fields
are initialized.
Affected products
Linux · LinuxRelated CVEs — Linux
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