CVE-2026-23313

Summary

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

i40e: Fix preempt count leak in napi poll tracepoint

Using get_cpu() in the tracepoint assignment causes an obvious preempt count leak because nothing invokes put_cpu() to undo it:

softirq: huh, entered softirq 3 NET_RX with preempt_count 00000100, exited with 00000101?

This clearly has seen a lot of testing in the last 3+ years…

Use smp_processor_id() instead.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux6d4d584a7ea8fc8d2be77545cb503118c193738a < fa5d5baf67f619c7aa70697a194b5a9edd9f5bb7affected
LinuxLinux6d4d584a7ea8fc8d2be77545cb503118c193738a < b7e91827e1cf89cd34ad11dc8f8c010b70ab786eaffected
LinuxLinux6d4d584a7ea8fc8d2be77545cb503118c193738a < 9e0f091821571f0da387462803ee42f0bb157582affected
LinuxLinux6d4d584a7ea8fc8d2be77545cb503118c193738a < dca4ea596a3b0a1b82bc1d9f3e4d88bd9ad9561faffected
LinuxLinux6d4d584a7ea8fc8d2be77545cb503118c193738a < 4b3d54a85bd37ebf2d9836f0d0de775c0ff21af9affected
LinuxLinux6.2affected
LinuxLinux0 < 6.2unaffected
LinuxLinux6.6.136 <= 6.6.*unaffected
LinuxLinux6.12.77 <= 6.12.*unaffected
LinuxLinux6.18.17 <= 6.18.*unaffected
LinuxLinux6.19.7 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References