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scsi: qla2xxx: Fix queue teardown NULL dma_free and bitmap locking

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-97537

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-97537

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
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Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "73208dfd7ab19f379d73e8a0fbf30f92c203e5e8",
        "lessThan": "2e6f60adf609c77e828f64e0cd371920bef91c12",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "73208dfd7ab19f379d73e8a0fbf30f92c203e5e8",
        "lessThan": "56e25d716833604fd5bff388e472f290bfe793aa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "73208dfd7ab19f379d73e8a0fbf30f92c203e5e8",
        "lessThan": "f35cb67f2092b49d7949065dd56895ed47238f22",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "73208dfd7ab19f379d73e8a0fbf30f92c203e5e8",
        "lessThan": "94fc0c5b45de2bf3a691619bcfd10b9a49fc647e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "73208dfd7ab19f379d73e8a0fbf30f92c203e5e8",
        "lessThan": "34a40e0dff940ac5eba494a69b553ea571e24873",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/scsi/qla2xxx/qla_mid.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.29"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.29",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/scsi/qla2xxx/qla_mid.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-97537

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#48781 · Revision 1
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