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CVE-2022-48941

ice: fix concurrent reset and removal of VFs

High8.8EPSS 0.17%
Published
Updated
Reserved
Assigned by
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: ice: fix concurrent reset and removal of VFs Commit c503e63200c6 ("ice: Stop processing VF messages during teardown") introduced a driver state flag, ICE_VF_DEINIT_IN_PROGRESS, which is intended to prevent some issues with concurrently handling messages from VFs while tearing down the VFs. This change was motivated by crashes caused while tearing down and bringing up VFs in rapid succession. It turns out that the fix actually introduces issues with the VF driver caused because the PF no longer responds to any messages sent by the VF during its .remove routine. This results in the VF potentially removing its DMA memory before the PF has shut down the device queues. Additionally, the fix doesn't actually resolve concurrency issues within the ice driver. It is possible for a VF to initiate a reset just prior to the ice driver removing VFs. This can result in the remove task concurrently operating while the VF is being reset. This results in similar memory corruption and panics purportedly fixed by that commit. Fix this concurrency at its root by protecting both the reset and removal flows using the existing VF cfg_lock. This ensures that we cannot remove the VF while any outstanding critical tasks such as a virtchnl message or a reset are occurring. This locking change also fixes the root cause originally fixed by commit c503e63200c6 ("ice: Stop processing VF messages during teardown"), so we can simply revert it. Note that I kept these two changes together because simply reverting the original commit alone would leave the driver vulnerable to worse race conditions.

Scores

CVSS scores of CVE-2022-48941, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NVDNVD · Modified3.1Medium4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.17% · top 93% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.

Weakness

Affected products

  • Linux · Linux

    • affected c503e63200c679e362afca7aca9d3dc63a0f45ed – < 3c805fce07c9dbc47d8a9129c7c5458025951957
    • affected c503e63200c679e362afca7aca9d3dc63a0f45ed – < 2a3e61de89bab6696aa28b70030eb119968c5586
    • affected c503e63200c679e362afca7aca9d3dc63a0f45ed – < fadead80fe4c033b5e514fcbadd20b55c4494112
    • affected 8a08142433624fd1088bc8c13639408cf4e1707c
    • affected 5.13.12 – < 5.14

  • Linux · Linux

    • affected 5.14
    • unaffected < 5.14
    • unaffected 5.15.26 – ≤ 5.15.*
    • unaffected 5.16.12 – ≤ 5.16.*
    • unaffected 5.17 – ≤ *

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .