CVE-2026-97537 (GCVE-0-2026-97537)
Vulnerability from cvelistv5 – Published: 2026-09-25 10:21 – Updated: 2026-10-30 12:37
VLAI
EPSS
VEX
Title
scsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking
Summary
In the Linux kernel, the following vulnerability has been resolved:
scsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking
qla25xx_free_req_que() and qla25xx_free_rsp_que() have two pre-existing
bugs exposed on the error path of qla25xx_create_{req,rsp}_que():
1. When dma_alloc_coherent() fails during queue creation, the error
path calls the free function with req->ring / rsp->ring still NULL
(from kzalloc). The unconditional dma_free_coherent() with a NULL
cpu_addr is undefined behavior and can panic.
2. The free functions clear req_qid_map / rsp_qid_map under vport_lock,
but the create functions protect the same bitmaps with mq_lock.
This provides no mutual exclusion. Additionally, the create error
path clears the bit and releases mq_lock before calling the free
function, creating a window where another thread can allocate the
same que_id and have its ha->req_q_map entry clobbered by the
subsequent lockless NULL assignment in the free function.
Fix by:
- Guarding dma_free_coherent() with a NULL check on the ring pointer.
- Using mq_lock (the lock held by all creators) in the free functions
to atomically NULL the map entry and clear the bitmap bit.
- Removing the now-redundant clear_bit blocks from the create error
paths since the free functions handle it atomically.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
73208dfd7ab19f379d73e8a0fbf30f92c203e5e8 , < b65e3a82f77b7a63e386623d2ea70d2b5580295a
(git)
Affected: 73208dfd7ab19f379d73e8a0fbf30f92c203e5e8 , < a9ff85886425355c72749be6090758aa19a89f16 (git) Affected: 73208dfd7ab19f379d73e8a0fbf30f92c203e5e8 , < 81ee4df2a488f0909f7ff563e88a0e0099485a8b (git) Affected: 73208dfd7ab19f379d73e8a0fbf30f92c203e5e8 , < 2e6f60adf609c77e828f64e0cd371920bef91c12 (git) Affected: 73208dfd7ab19f379d73e8a0fbf30f92c203e5e8 , < 56e25d716833604fd5bff388e472f290bfe793aa (git) Affected: 73208dfd7ab19f379d73e8a0fbf30f92c203e5e8 , < f35cb67f2092b49d7949065dd56895ed47238f22 (git) Affected: 73208dfd7ab19f379d73e8a0fbf30f92c203e5e8 , < 94fc0c5b45de2bf3a691619bcfd10b9a49fc647e (git) Affected: 73208dfd7ab19f379d73e8a0fbf30f92c203e5e8 , < 34a40e0dff940ac5eba494a69b553ea571e24873 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.29
Unaffected: 0 , < 2.6.29 (semver) Unaffected: 5.10.273 , ≤ 5.10.* (semver) Unaffected: 5.15.224 , ≤ 5.15.* (semver) Unaffected: 6.1.191 , ≤ 6.1.* (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.112 , ≤ 6.12.* (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.2.7 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix) |
guessed |
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking\n\nqla25xx_free_req_que() and qla25xx_free_rsp_que() have two pre-existing\nbugs exposed on the error path of qla25xx_create_{req,rsp}_que():\n\n 1. When dma_alloc_coherent() fails during queue creation, the error\n path calls the free function with req-\u003ering / rsp-\u003ering still NULL\n (from kzalloc). The unconditional dma_free_coherent() with a NULL\n cpu_addr is undefined behavior and can panic.\n\n 2. The free functions clear req_qid_map / rsp_qid_map under vport_lock,\n but the create functions protect the same bitmaps with mq_lock.\n This provides no mutual exclusion. Additionally, the create error\n path clears the bit and releases mq_lock before calling the free\n function, creating a window where another thread can allocate the\n same que_id and have its ha-\u003ereq_q_map entry clobbered by the\n subsequent lockless NULL assignment in the free function.\n\nFix by:\n\n - Guarding dma_free_coherent() with a NULL check on the ring pointer.\n\n - Using mq_lock (the lock held by all creators) in the free functions\n to atomically NULL the map entry and clear the bitmap bit.\n\n - Removing the now-redundant clear_bit blocks from the create error\n paths since the free functions handle it atomically."
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T12:37:17.869Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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{
"url": "https://git.kernel.org/stable/c/a9ff85886425355c72749be6090758aa19a89f16"
},
{
"url": "https://git.kernel.org/stable/c/81ee4df2a488f0909f7ff563e88a0e0099485a8b"
},
{
"url": "https://git.kernel.org/stable/c/2e6f60adf609c77e828f64e0cd371920bef91c12"
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"url": "https://git.kernel.org/stable/c/56e25d716833604fd5bff388e472f290bfe793aa"
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"url": "https://git.kernel.org/stable/c/94fc0c5b45de2bf3a691619bcfd10b9a49fc647e"
},
{
"url": "https://git.kernel.org/stable/c/34a40e0dff940ac5eba494a69b553ea571e24873"
}
],
"title": "scsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking",
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"datePublished": "2026-09-25T10:21:35.608Z",
"dateReserved": "2026-09-24T16:01:01.153Z",
"dateUpdated": "2026-10-30T12:37:17.869Z",
"state": "PUBLISHED"
},
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"date": "2026-11-14",
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"source": "Microsoft CSAF VEX",
"status": "final",
"title": "scsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-97537.json",
"version": "5"
},
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking\n\nqla25xx_free_req_que() and qla25xx_free_rsp_que() have two pre-existing\nbugs exposed on the error path of qla25xx_create_{req,rsp}_que():\n\n 1. When dma_alloc_coherent() fails during queue creation, the error\n path calls the free function with req-\u003ering / rsp-\u003ering still NULL\n (from kzalloc). The unconditional dma_free_coherent() with a NULL\n cpu_addr is undefined behavior and can panic.\n\n 2. The free functions clear req_qid_map / rsp_qid_map under vport_lock,\n but the create functions protect the same bitmaps with mq_lock.\n This provides no mutual exclusion. Additionally, the create error\n path clears the bit and releases mq_lock before calling the free\n function, creating a window where another thread can allocate the\n same que_id and have its ha-\u003ereq_q_map entry clobbered by the\n subsequent lockless NULL assignment in the free function.\n\nFix by:\n\n - Guarding dma_free_coherent() with a NULL check on the ring pointer.\n\n - Using mq_lock (the lock held by all creators) in the free functions\n to atomically NULL the map entry and clear the bitmap bit.\n\n - Removing the now-redundant clear_bit blocks from the create error\n paths since the free functions handle it atomically."
}
],
"id": "CVE-2026-97537",
"lastModified": "2026-10-30T13:21:07.253",
"metrics": {},
"published": "2026-09-25T11:17:03.973",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2e6f60adf609c77e828f64e0cd371920bef91c12"
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{
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}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-11-06T02:23:57+00:00",
"cve": "CVE-2026-97537",
"id": "CVE-2026-97537",
"initial_release_date": "2026-09-25T00:00:00+00:00",
"product_status:known_affected": "203",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: scsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97537.json",
"version": "3"
}
}
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.