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scsi: qla2xxx: Zero-init bsg stack buffers to avoid info leak

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Zero-init bsg stack buffers to avoid info leak Several bsg handlers stage their request/reply in an uninitialized 256-byte on-stack buffer (uint8_t bsg[DMA_POOL_SIZE]) and fill it via sg_copy_to_buffer(), which only copies as many bytes as the user-supplied request payload. When the request is shorter than the structure, the remainder of the buffer is left holding stale stack data. qla2x00_read_fru_status() and qla2x00_read_i2c() then copy the full structure back to the reply payload with sg_copy_from_buffer(), leaking the uninitialized stack bytes to user space. The write/update paths do not copy the buffer back, but can feed uninitialized fields to the device. Zero the stack buffer at declaration in all five handlers, mirroring the heap kzalloc() approach, so short requests can no longer expose stale memory.

Announced Source revision 1
Original source ↗

CVE-2026-89843

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-2026-89843

Linux

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

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

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": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
        "lessThan": "1c820d0900e4aacd5020b989159f6b4b2f7d0d6a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
        "lessThan": "26bc6a2c235a70bfc9b6de412600208aca820e20",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
        "lessThan": "5ab32dff910291b5e6bf6223f8a4003536c1800a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
        "lessThan": "947c6bfcf7f5ec924995bec43e3108b98c75b44e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
        "lessThan": "708c0ec1e09c52fee24b74ce9398bf3f8d1c83fd",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
        "lessThan": "4fe5790674097897a1af1367d1e384f7e5a62fb7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
        "lessThan": "7881faf862ee301ecfe3adc0725bd2fa0021cd95",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
        "lessThan": "b93d3bb3afe1b44489927de1eb4e66e8536a5935",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/scsi/qla2xxx/qla_bsg.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.2"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.2",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.51",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/scsi/qla2xxx/qla_bsg.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89843

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#36295 · Revision 1
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