FKIE_CVE-2022-49377
Vulnerability from fkie_nvd - Published: 2025-02-26 07:01 - Updated: 2025-03-25 14:58
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
blk-mq: don't touch ->tagset in blk_mq_get_sq_hctx
blk_mq_run_hw_queues() could be run when there isn't queued request and
after queue is cleaned up, at that time tagset is freed, because tagset
lifetime is covered by driver, and often freed after blk_cleanup_queue()
returns.
So don't touch ->tagset for figuring out current default hctx by the mapping
built in request queue, so use-after-free on tagset can be avoided. Meantime
this way should be fast than retrieving mapping from tagset.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-mq: don\u0027t touch -\u003etagset in blk_mq_get_sq_hctx\n\nblk_mq_run_hw_queues() could be run when there isn\u0027t queued request and\nafter queue is cleaned up, at that time tagset is freed, because tagset\nlifetime is covered by driver, and often freed after blk_cleanup_queue()\nreturns.\n\nSo don\u0027t touch -\u003etagset for figuring out current default hctx by the mapping\nbuilt in request queue, so use-after-free on tagset can be avoided. Meantime\nthis way should be fast than retrieving mapping from tagset."
},
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"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: blk-mq: no toque -\u0026gt;tagset en blk_mq_get_sq_hctx blk_mq_run_hw_queues() podr\u00eda ejecutarse cuando no hay una solicitud en cola y despu\u00e9s de que se limpie la cola, en ese momento se libera el conjunto de etiquetas, porque el controlador cubre la vida \u00fatil del conjunto de etiquetas y, a menudo, se libera despu\u00e9s de que blk_cleanup_queue() regrese. Por lo tanto, no toque -\u0026gt;tagset para averiguar el hctx predeterminado actual por el mapeo integrado en la cola de solicitudes, por lo que se puede evitar el use-after-free en el conjunto de etiquetas. Mientras tanto, esta forma deber\u00eda ser m\u00e1s r\u00e1pida que recuperar el mapeo del conjunto de etiquetas."
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"id": "CVE-2022-49377",
"lastModified": "2025-03-25T14:58:01.213",
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"attackVector": "LOCAL",
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"baseScore": 7.8,
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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"published": "2025-02-26T07:01:14.357",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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