blk-mq: avoid double ->queue_rq() because of early timeout
Published Oct 7, 2025
5.5
MEDIUMCVSS 3.1
EPSS 0.20%
Description
David Jeffery found one double ->queue_rq() issue, so far it can be triggered in VM use case because of long vmexit latency or preempt latency of vCPU pthread or long page fault in vCPU pthread, then block IO req could be timed out before queuing the request to hardware but after calling blk_mq_start_request() during ->queue_rq(), then timeout handler may handle it by requeue, then double ->queue_rq() is caused, and kernel panic.
So far, it is driver's responsibility to cover the race between timeout and completion, so it seems supposed to be solved in driver in theory, given driver has enough knowledge.
But it is really one common problem, lots of driver could have similar issue, and could be hard to fix all affected drivers, even it isn't easy for driver to handle the race. So David suggests this patch by draining in-progress ->queue_rq() for solving this issue.
Affected products
-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 4.18StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<4.18
- Version 6.0.16StatusunaffectedConstraints<=6.0.*
- Version 6.1.2StatusunaffectedConstraints<=6.1.*
- Version 6.2StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
- ≥ 4.18 · < 6.0.16
- ≥ 6.1 · < 6.1.2
No data.
Red Hat Enterprise Linux 8
kernel-0:4.18.0-477.10.1.el8_8
Fixed · RHSA-2023:2951
Red Hat Enterprise Linux 9
kernel-0:5.14.0-284.11.1.el9_2
Fixed · RHSA-2023:2458
Red Hat Enterprise Linux 9
kernel-0:5.14.0-284.11.1.el9_2
Fixed · RHSA-2023:2458
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Fix deferred
Red Hat Enterprise Linux 7
kernel-rt
Fix deferred
Red Hat Enterprise Linux 8
kernel-rt
Fix deferred
Red Hat Enterprise Linux 9
kernel-rt
Fix deferred
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-477.10.1.el8_8 | Fixed | RHSA-2023:2951 |
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-284.11.1.el9_2 | Fixed | RHSA-2023:2458 |
| Red Hat Enterprise Linux 9 | kernel-0:5.14.0-284.11.1.el9_2 | Fixed | RHSA-2023:2458 |
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Fix deferred | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Fix deferred | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Fix deferred | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.20% (0.00201) | 8.97th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.18% (0.00184) | 8.15th | v5 (v2026.06.15) |
| Oct 8, 2025 | 0.02% (0.00017) | 2.79th | v4 (v2025.03.14) |
References (8)
- https://access.redhat.com/security/cve/CVE-2022-50554 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2402306 Issue Tracking
- https://git.kernel.org/stable/c/7a73c54a3750895888ab586896736c9434e062a1 Patch
- https://git.kernel.org/stable/c/82c229476b8f6afd7e09bc4dc77d89dc19ff7688 Patch
- https://git.kernel.org/stable/c/8b3d6b029a552d2978bbac275303d11419826a69 Patch
- https://lore.kernel.org/linux-cve-announce/2025100700-CVE-2022-50554-f4fb@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2022-50554
- https://www.cve.org/CVERecord?id=CVE-2022-50554
Change history (0)
No recorded changes yet.