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scsi: qla2xxx: Bound i2c->length in I2C bsg handlers

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Bound i2c->length in I2C bsg handlers struct qla_i2c_access carries a 16-bit length field alongside a fixed 64-byte buffer: struct qla_i2c_access { uint16_t device, offset, option, length; uint8_t buffer[0x40]; } __packed; qla2x00_write_i2c() and qla2x00_read_i2c() use the user-supplied i2c->length without any bounds check. i2c is overlaid on a 256-byte on-stack buffer and sfp is a 256-byte DMA-pool buffer, so a length up to 65535 overruns both: - write: memcpy(sfp, i2c->buffer, i2c->length) over-reads the stack and over-writes the sfp heap buffer, and qla2x00_write_sfp() then DMAs i2c->length bytes out of the 256-byte buffer. - read: qla2x00_read_sfp() DMAs i2c->length bytes into the 256-byte sfp, then memcpy(i2c->buffer, sfp, i2c->length) overflows the 64-byte buffer inside the on-stack array. A caller holding CAP_SYS_RAWIO can use this to corrupt the heap and the kernel stack. Reject requests whose length exceeds the buffer before any copy or DMA transfer in both handlers.

Announced Source revision 1
Original source ↗

CVE-2026-89864

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-2026-89864

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": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
        "lessThan": "8f01f886cc5e7bbc16cbf1a9928fdebbc911e973",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
        "lessThan": "2be39946abcde5a6416fb074ef728429e246a996",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
        "lessThan": "522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
        "lessThan": "9a756f277eb89f769dbf380f38245c270d31fdb5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
        "lessThan": "32d6df14fdab71fe1ba304fd9a0db0411ea2e043",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
        "lessThan": "97ca58b0fb026799b99e3d552d5f69cf9a3113ad",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
        "lessThan": "47049fdadc0eaa115e813735b827e1379c0d2cf8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
        "lessThan": "0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59",
        "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": "3.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.7",
        "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-2026-89864

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#36314 · Revision 1
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Publisher date
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