CVE-2026-68334

Summary

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

rxrpc: fix io_thread race in rxrpc_wake_up_io_thread()

rxrpc_wake_up_io_thread() checks local->io_thread before waking it, but then reloads the pointer for wake_up_process().

local->io_thread is cleared with WRITE_ONCE() when the I/O thread exits, so the second load can see NULL even if the first load did not.

Take a READ_ONCE() snapshot and use it for both the NULL check and the wake_up_process() call, as rxrpc_encap_rcv() already does.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5800b1cf3fd8ccab752a101865be1e76dac33142 < c9165e199f56997f2f2deb5d3ec2dfab98dfa288affected
LinuxLinux5800b1cf3fd8ccab752a101865be1e76dac33142 < 092b42cf3f6013eec43607ecbcad674723649514affected
LinuxLinux5800b1cf3fd8ccab752a101865be1e76dac33142 < 745fb794c3e933c023af9dbb5876a5e16ad2dc71affected
LinuxLinux6.16affected
LinuxLinux0 < 6.16unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc5 <= *unaffected

Weaknesses

References