CVE-2021-47498
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved:
dm rq: don't queue request to blk-mq during DM suspend
DM uses blk-mq's quiesce/unquiesce to stop/start device mapper queue.
But blk-mq's unquiesce may come from outside events, such as elevator switch, updating nr_requests or others, and request may come during suspend, so simply ask for blk-mq to requeue it.
Fixes one kernel panic issue when running updating nr_requests and dm-mpath suspend/resume stress test.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 7b17c2f7292ba1f3f98dae3f7077f9e569653276 < 8050652810bf38241edec8717393d2446e8036f1 | affected |
| Linux | Linux | 7b17c2f7292ba1f3f98dae3f7077f9e569653276 < 8ca9745efe3528feb06ca4e117188038eea2d351 | affected |
| Linux | Linux | 7b17c2f7292ba1f3f98dae3f7077f9e569653276 < b4459b11e84092658fa195a2587aff3b9637f0e7 | affected |
| Linux | Linux | 4.10 | affected |
| Linux | Linux | 0 < 4.10 | unaffected |
| Linux | Linux | 5.10.241 <= 5.10.* | unaffected |
| Linux | Linux | 5.14.14 <= 5.14.* | unaffected |
| Linux | Linux | 5.15 <= * | unaffected |
Weaknesses
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
CVE Program Container
Additional References
- https://git.kernel.org/stable/c/8ca9745efe3528feb06ca4e117188038eea2d351
- https://git.kernel.org/stable/c/b4459b11e84092658fa195a2587aff3b9637f0e7
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
References
- https://git.kernel.org/stable/c/8050652810bf38241edec8717393d2446e8036f1
- https://git.kernel.org/stable/c/8ca9745efe3528feb06ca4e117188038eea2d351
- https://git.kernel.org/stable/c/b4459b11e84092658fa195a2587aff3b9637f0e7
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