CVE-2022-48985

Advisory lineage Upstream: 0 Downstream: 11
Analyzed
Published: 21 Oct 2024, 20:06
Last modified:11 May 2026, 18:50

Vulnerability Summary

Overall Risk (default)
low
19/100
CVSS Score
4.7 MEDIUM
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

21 Oct 2024, 20:06
Published
Vulnerability first disclosed
11 May 2026, 18:50
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: net: mana: Fix race on per-CQ variable napi work_done After calling napi_complete_done(), the NAPIF_STATE_SCHED bit may be cleared, and another CPU can start napi thread and access per-CQ variable, cq->work_done. If the other thread (for example, from busy_poll) sets it to a value >= budget, this thread will continue to run when it should stop, and cause memory corruption and panic. To fix this issue, save the per-CQ work_done variable in a local variable before napi_complete_done(), so it won't be corrupted by a possible concurrent thread after napi_complete_done(). Also, add a flag bit to advertise to the NIC firmware: the NAPI work_done variable race is fixed, so the driver is able to reliably support features like busy_poll.

CVSS Metrics

  • v3.1•MEDIUM•Score: 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Affected Systems

  • linux•linux

    ≥ e1b5683ff62e7b328317aec08869495992053e9d, < fe50a9bbeb1f042e756c5cfa7708112c944368de | ≥ e1b5683ff62e7b328317aec08869495992053e9d, < 6740d8572ccd1bca50d8a1ca2bedc333f50ed5f3 | ≥ e1b5683ff62e7b328317aec08869495992053e9d, < 18010ff776fa42340efc428b3ea6d19b3e7c7b21 | 5.15

  • linux•linux_kernel

    ≥ 5.15, < 5.15.83 | ≥ 5.16, < 6.0.13 | 6.1:rc1 | 6.1:rc2 | 6.1:rc3 | 6.1:rc4 | 6.1:rc5 | 6.1:rc6 | 6.1:rc7 | 6.1:rc8

References (3)