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FKIE_CVE-2026-89865

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: Zero SFP DMA buffer in FRU/I2C bsg handlers The FRU and I2C bsg handlers stage their transfer in a DMA_POOL_SIZE (256-byte) bounce buffer obtained from dma_pool_alloc(), which does not zero the allocation. They initialize only a few leading bytes before handing the buffer to qla2x00_write_sfp(). qla2x00_write_sfp() can override the transfer length with a user-supplied value: if (len == 1) opt |= BIT_0; if (opt & BIT_0) len = *sfp; *sfp is the first byte of the (user-controlled) payload, so len can grow up to 255. The device then DMA-reads len bytes from the 256-byte pool buffer. Since only a small prefix was written (e.g. MAX_FRU_SIZE == 36 bytes for a FRU version, one byte for a FRU status register), the hardware reads past the initialized region and writes up to ~219 bytes of stale DMA-pool heap memory to the device flash. Allocate the buffer with dma_pool_zalloc() in all five FRU/I2C handlers so any bytes beyond the initialized data are zero rather than stale heap contents.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/09703bc7c0be3a7a155b0ff5f21f6765ba3f519c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/581590f560b74399151b3cbc88574424c2f3d2dc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84bde5ce4038d9ad811e5c994305bbfcbd7a9f79
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/97c45c75f5cdec96b1a4fba8b1d55d0dd01af1e8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a476377a66897549dd49bee319f4df66623417b7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a5501c42256235523c4dddf799f032dfbf4f4c77
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b157256c28086c434afd70cc78bf9b4d8caf1276
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b47d4a1547d9ef21b2e9d1a739fe2204d4be05dc
Impacted products
Vendor Product Version
To clipboard 

{
  "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": "a476377a66897549dd49bee319f4df66623417b7",
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "versionType": "git"
            },
            {
              "lessThan": "09703bc7c0be3a7a155b0ff5f21f6765ba3f519c",
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "versionType": "git"
            },
            {
              "lessThan": "97c45c75f5cdec96b1a4fba8b1d55d0dd01af1e8",
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "versionType": "git"
            },
            {
              "lessThan": "84bde5ce4038d9ad811e5c994305bbfcbd7a9f79",
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "versionType": "git"
            },
            {
              "lessThan": "581590f560b74399151b3cbc88574424c2f3d2dc",
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "versionType": "git"
            },
            {
              "lessThan": "b157256c28086c434afd70cc78bf9b4d8caf1276",
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "versionType": "git"
            },
            {
              "lessThan": "a5501c42256235523c4dddf799f032dfbf4f4c77",
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "versionType": "git"
            },
            {
              "lessThan": "b47d4a1547d9ef21b2e9d1a739fe2204d4be05dc",
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "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": "3.2"
            },
            {
              "lessThan": "3.2",
              "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: Zero SFP DMA buffer in FRU/I2C bsg handlers\n\nThe FRU and I2C bsg handlers stage their transfer in a DMA_POOL_SIZE\n(256-byte) bounce buffer obtained from dma_pool_alloc(), which does not\nzero the allocation. They initialize only a few leading bytes before\nhanding the buffer to qla2x00_write_sfp().\n\nqla2x00_write_sfp() can override the transfer length with a user-supplied\nvalue:\n\n\tif (len == 1)\n\t\topt |= BIT_0;\n\tif (opt \u0026 BIT_0)\n\t\tlen = *sfp;\n\n*sfp is the first byte of the (user-controlled) payload, so len can grow\nup to 255. The device then DMA-reads len bytes from the 256-byte pool\nbuffer. Since only a small prefix was written\n(e.g. MAX_FRU_SIZE == 36 bytes for a FRU version, one byte for a FRU\nstatus register), the hardware reads past the initialized region and\nwrites up to ~219 bytes of stale DMA-pool heap memory to the device\nflash.\n\nAllocate the buffer with dma_pool_zalloc() in all five FRU/I2C handlers\nso any bytes beyond the initialized data are zero rather than stale heap\ncontents."
    }
  ],
  "id": "CVE-2026-89865",
  "lastModified": "2026-09-16T11:16:54.610",
  "metrics": {},
  "published": "2026-09-16T11:16:54.610",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/09703bc7c0be3a7a155b0ff5f21f6765ba3f519c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/581590f560b74399151b3cbc88574424c2f3d2dc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/84bde5ce4038d9ad811e5c994305bbfcbd7a9f79"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/97c45c75f5cdec96b1a4fba8b1d55d0dd01af1e8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a476377a66897549dd49bee319f4df66623417b7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a5501c42256235523c4dddf799f032dfbf4f4c77"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b157256c28086c434afd70cc78bf9b4d8caf1276"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b47d4a1547d9ef21b2e9d1a739fe2204d4be05dc"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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