CVE-2024-50157: RDMA/bnxt_re: Avoid CPU lockups due fifo occupancy check loop

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-07 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: Avoid CPU lockups due fifo occupancy check loop Driver waits indefinitely for the fifo occupancy to go below a threshold as soon as the pacing interrupt is received. This can cause soft lockup on one of the processors, if the rate of DB is very high. Add a loop count for FPGA and exit the __wait_for_fifo_occupancy_below_th if the loop is taking more time. Pacing will be continuing until the occupancy is below the threshold. This is ensured by the checks in bnxt_re_pacing_timer_exp and further scheduling the work for pacing based on the fifo occupancy.

Affected products

Linux kernel: from 6.6 before 6.11.6; 6.12-rc1, 6.12-rc2, 6.12-rc3 — fixed in 6.11.6

How to fix

Upgrade to a fixed version: Linux kernel 6.11.6. Check the vendor advisory for mitigations.

References

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