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CVE-2021-47382s390/qeth: fix deadlock during failing recovery

Description

In the Linux kernel, the following vulnerability has been resolved: s390/qeth: fix deadlock during failing recovery Commit 0b9902c1fcc5 ("s390/qeth: fix deadlock during recovery") removed taking discipline_mutex inside qeth_do_reset(), fixing potential deadlocks. An error path was missed though, that still takes discipline_mutex and thus has the original deadlock potential. Intermittent deadlocks were seen when a qeth channel path is configured offline, causing a race between qeth_do_reset and ccwgroup_remove. Call qeth_set_offline() directly in the qeth_do_reset() error case and then a new variant of ccwgroup_set_offline(), without taking discipline_mutex.

Timeline

  1. ID reserved

    By Linux

  2. Published

  3. · 2 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2021-47382, by who scored it
Scored byCVSSScoreVector
NVDNVD · Analyzed3.1Medium4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.15% · top 96% of all CVEs (13 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: Medium 4.7.

Affected products

  • Linux · Linux

    • affected b41b554c1ee75070a14c02a88496b1f231c7eacc – < 0bfe741741327822d1482c7edef0184636d08b40
    • affected b41b554c1ee75070a14c02a88496b1f231c7eacc – < d2b59bd4b06d84a4eadb520b0f71c62fe8ec0a62
    • affected af0c184ea106051e428b5a0b5f2dfd31cbc54c52
    • affected 5.10.8 – < 5.11

  • Linux · Linux

    • affected 5.11
    • unaffected < 5.11
    • unaffected 5.14.10 – ≤ 5.14.*
    • unaffected 5.15 – ≤ *

References

References2

Sources

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

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Record last updated .