FKIE_CVE-2026-89864

Vulnerability from fkie_nvd - Published: 2026-09-16 11:16 - Updated: 2026-09-16 11:16
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2be39946abcde5a6416fb074ef728429e246a996
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/32d6df14fdab71fe1ba304fd9a0db0411ea2e043
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/47049fdadc0eaa115e813735b827e1379c0d2cf8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8f01f886cc5e7bbc16cbf1a9928fdebbc911e973
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/97ca58b0fb026799b99e3d552d5f69cf9a3113ad
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a756f277eb89f769dbf380f38245c270d31fdb5
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_bsg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8f01f886cc5e7bbc16cbf1a9928fdebbc911e973",
              "status": "affected",
              "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
              "versionType": "git"
            },
            {
              "lessThan": "2be39946abcde5a6416fb074ef728429e246a996",
              "status": "affected",
              "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
              "versionType": "git"
            },
            {
              "lessThan": "522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e",
              "status": "affected",
              "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
              "versionType": "git"
            },
            {
              "lessThan": "9a756f277eb89f769dbf380f38245c270d31fdb5",
              "status": "affected",
              "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
              "versionType": "git"
            },
            {
              "lessThan": "32d6df14fdab71fe1ba304fd9a0db0411ea2e043",
              "status": "affected",
              "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
              "versionType": "git"
            },
            {
              "lessThan": "97ca58b0fb026799b99e3d552d5f69cf9a3113ad",
              "status": "affected",
              "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
              "versionType": "git"
            },
            {
              "lessThan": "47049fdadc0eaa115e813735b827e1379c0d2cf8",
              "status": "affected",
              "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
              "versionType": "git"
            },
            {
              "lessThan": "0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59",
              "status": "affected",
              "version": "9ebb5d9c69f1f5721f9f6f49e501c674c1e184ae",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_bsg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.7"
            },
            {
              "lessThan": "3.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Bound i2c-\u003elength in I2C bsg handlers\n\nstruct qla_i2c_access carries a 16-bit length field alongside a fixed\n64-byte buffer:\n\n\tstruct qla_i2c_access {\n\t\tuint16_t device, offset, option, length;\n\t\tuint8_t  buffer[0x40];\n\t} __packed;\n\nqla2x00_write_i2c() and qla2x00_read_i2c() use the user-supplied\ni2c-\u003elength without any bounds check. i2c is overlaid on a 256-byte\non-stack buffer and sfp is a 256-byte DMA-pool buffer, so a length up to\n65535 overruns both:\n\n  - write: memcpy(sfp, i2c-\u003ebuffer, i2c-\u003elength) over-reads the stack and\n    over-writes the sfp heap buffer, and qla2x00_write_sfp() then DMAs\n    i2c-\u003elength bytes out of the 256-byte buffer.\n  - read: qla2x00_read_sfp() DMAs i2c-\u003elength bytes into the 256-byte sfp,\n    then memcpy(i2c-\u003ebuffer, sfp, i2c-\u003elength) overflows the 64-byte\n    buffer inside the on-stack array.\n\nA caller holding CAP_SYS_RAWIO can use this to corrupt the heap and the\nkernel stack. Reject requests whose length exceeds the buffer before any\ncopy or DMA transfer in both handlers."
    }
  ],
  "id": "CVE-2026-89864",
  "lastModified": "2026-09-16T11:16:54.480",
  "metrics": {},
  "published": "2026-09-16T11:16:54.480",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0918ee2c0eeb4d7f45b82b3dc11e65c2d9b7ad59"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2be39946abcde5a6416fb074ef728429e246a996"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/32d6df14fdab71fe1ba304fd9a0db0411ea2e043"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/47049fdadc0eaa115e813735b827e1379c0d2cf8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/522d6dcdc645d8f97d6b4cdfd6d8eea307f3ff0e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8f01f886cc5e7bbc16cbf1a9928fdebbc911e973"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/97ca58b0fb026799b99e3d552d5f69cf9a3113ad"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9a756f277eb89f769dbf380f38245c270d31fdb5"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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