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CVE-2026-89865

Estado: RecibidaSin puntuar—

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:

*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.

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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.

Detalles técnicos trazas, registros y código del informe original
	if (len == 1)
		opt |= BIT_0;
	if (opt & BIT_0)
		len = *sfp;

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-89865",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "a476377a66897549dd49bee319f4df66623417b7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "09703bc7c0be3a7a155b0ff5f21f6765ba3f519c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "97c45c75f5cdec96b1a4fba8b1d55d0dd01af1e8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "84bde5ce4038d9ad811e5c994305bbfcbd7a9f79",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "581590f560b74399151b3cbc88574424c2f3d2dc",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "b157256c28086c434afd70cc78bf9b4d8caf1276",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "a5501c42256235523c4dddf799f032dfbf4f4c77",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "697a4bc69159c3396035b0506ffa55c4b2d0b1f4",
              "lessThan": "b47d4a1547d9ef21b2e9d1a739fe2204d4be05dc",
              "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-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/scsi/qla2xxx/qla_bsg.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-16T11:16:54.610",
  "references": [
    {
      "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",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "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 & 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."
    }
  ],
  "lastModified": "2026-09-16T11:16:54.610",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}