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CVE-2023-53292
blk-mq: fix NULL dereference on q->elevator in blk_mq_elv_switch_none
Medium5.5EPSS 0.15%
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix NULL dereference on q->elevator in blk_mq_elv_switch_none After grabbing q->sysfs_lock, q->elevator may become NULL because of elevator switch. Fix the NULL dereference on q->elevator by checking it with lock.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.15% · top 96% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 5fd7a84a09e640016fe106dd3e992f5210e23dc7 – < 988ddb77218d3975dd13dee7bb0e1fae098a9fdb
- affected 5fd7a84a09e640016fe106dd3e992f5210e23dc7 – < 3e977386521b71471e66ec2ba82efdfcc456adf2
- affected 5fd7a84a09e640016fe106dd3e992f5210e23dc7 – < 245165658e1c9f95c0fecfe02b9b1ebd30a1198a
- affected 5.19
- unaffected < 5.19
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.4.7 – ≤ 6.4.*
- unaffected 6.5 – ≤ *
References (6)
- https://git.kernel.org/stable/c/988ddb77218d3975dd13dee7bb0e1fae098a9fdb (opens in a new tab)
- https://git.kernel.org/stable/c/3e977386521b71471e66ec2ba82efdfcc456adf2 (opens in a new tab)
- https://git.kernel.org/stable/c/245165658e1c9f95c0fecfe02b9b1ebd30a1198a (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2023-53292)Record last updated .