spi: spi-qpic-snand: write the feature value before executing SET_FEATURE

{
  "id": "78988663e1c0116a8ffd3622e3a9e77c5f289f01f0f8dc4aa01aad33b4156318",
  "url": "https://osv.dev/vulnerability/CVE-2026-80712",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "spi: spi-qpic-snand: write the feature value before executing SET_FEATURE",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: spi: spi-qpic-snand: write the feature value before executing SET_FEATURE qcom_spi_send_cmdaddr() programs NAND_FLASH_CMD/NAND_EXEC_CMD and submits the descriptors, which makes the controller execute the command immediately. For SPINAND_SET_FEATURE the value to be written is only placed into NAND_FLASH_FEATURES afterwards, by qcom_spi_io_op(), in a second submission - so the chip is programmed with whatever that register happened to hold from a previous operation, and the intended value is only applied by the *next* SET_FEATURE. Measured on a TP-Link Archer AX55 v1 (IPQ5018, ESMT F50L1G41LB): writing 0x40 to the configuration register (0xb0) leaves the chip at 0x00, and the subsequent write of 0x00 leaves it at 0x40 - every write lands one operation late. This stayed unnoticed until v6.18 added SPI-NAND OTP support together with OTP entries for ESMT chips. spinand_otp_rw() enables OTP mode, reads, and disables it again, and mtd_otp_nvmem_add() does this during MTD registration. With the off-by-one, the \"disable\" write actually applies the previously requested value, so CFG_OTP_ENABLE ends up set: the chip stays in OTP mode, every subsequent array read returns the OTP area instead of the array (UBI reports an empty device) and all writes fail with -EIO because the OTP area is write protected. On this board that makes the whole flash unusable and the device unbootable. Write the feature value into NAND_FLASH_FE",
    "evidence": "osv:CVE-2026-80712",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.44",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-80712",
      "aliases": [
        "CVE-2026-80712"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7304d1909080ef0c9da703500a97f46c98393fcd"
                },
                {
                  "fixed": "581e5166f0780103dc91c0d8ebc801f9af4824b0"
                },
                {
                  "fixed": "3ba021079ef2ac6e21e3547328496ac42d22b56a"
                },
                {
                  "fixed": "8fd62901d6bf03f274a49dd0060793cc07dd51b0"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80712.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.15.0"
                },
                {
                  "fixed": "6.18.44"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.8"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80712.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.004620260Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3ba021079ef2ac6e21e3547328496ac42d22b56a",
        "https://git.kernel.org/stable/c/581e5166f0780103dc91c0d8ebc801f9af4824b0",
        "https://git.kernel.org/stable/c/8fd62901d6bf03f274a49dd0060793cc07dd51b0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80712.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-80712",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80712.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-80712",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491658,
  "published_at": "2026-08-28T06:53:11.243+00:00"
}