CVE-2022-48745: net/mlx5: Use del_timer_sync in fw reset flow of halting poll

Severity: medium (CVSS 4.7 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: 2024-06-20 · updated 2026-06-17
Weakness: CWE-362

Description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Use del_timer_sync in fw reset flow of halting poll Substitute del_timer() with del_timer_sync() in fw reset polling deactivation flow, in order to prevent a race condition which occurs when del_timer() is called and timer is deactivated while another process is handling the timer interrupt. A situation that led to the following call trace: RIP: 0010:run_timer_softirq+0x137/0x420 <IRQ> recalibrate_cpu_khz+0x10/0x10 ktime_get+0x3e/0xa0 ? sched_clock_cpu+0xb/0xc0 __do_softirq+0xf5/0x2ea irq_exit_rcu+0xc1/0xf0 sysvec_apic_timer_interrupt+0x9e/0xc0 asm_sysvec_apic_timer_interrupt+0x12/0x20 </IRQ>

Affected products

Linux kernel: from 5.10 before 5.10.97; from 5.11 before 5.15.20; from 5.16 before 5.16.6; 5.17-rc1, 5.17-rc2 — fixed in 5.10.97, 5.15.20, 5.16.6

How to fix

Upgrade to a fixed version: Linux kernel 5.10.97, 5.15.20, 5.16.6. Check the vendor advisory for mitigations.

References

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