{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7304d1909080ef0c9da703500a97f46c98393fcd"
            },
            {
              "fixed": "581e5166f0780103dc91c0d8ebc801f9af4824b0"
            },
            {
              "fixed": "3ba021079ef2ac6e21e3547328496ac42d22b56a"
            },
            {
              "fixed": "8fd62901d6bf03f274a49dd0060793cc07dd51b0"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.15.0"
            },
            {
              "fixed": "6.18.44"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80712.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: spi-qpic-snand: write the feature value before executing SET_FEATURE\n\nqcom_spi_send_cmdaddr() programs NAND_FLASH_CMD/NAND_EXEC_CMD and submits\nthe descriptors, which makes the controller execute the command\nimmediately. For SPINAND_SET_FEATURE the value to be written is only\nplaced into NAND_FLASH_FEATURES afterwards, by qcom_spi_io_op(), in a\nsecond submission - so the chip is programmed with whatever that register\nhappened to hold from a previous operation, and the intended value is only\napplied by the *next* SET_FEATURE.\n\nMeasured on a TP-Link Archer AX55 v1 (IPQ5018, ESMT F50L1G41LB): writing\n0x40 to the configuration register (0xb0) leaves the chip at 0x00, and the\nsubsequent write of 0x00 leaves it at 0x40 - every write lands one\noperation late.\n\nThis stayed unnoticed until v6.18 added SPI-NAND OTP support together\nwith OTP entries for ESMT chips. spinand_otp_rw() enables OTP mode,\nreads, and disables it again, and mtd_otp_nvmem_add() does this during\nMTD registration. With the off-by-one, the \"disable\" write actually\napplies the previously requested value, so CFG_OTP_ENABLE ends up set:\nthe chip stays in OTP mode, every subsequent array read returns the OTP\narea instead of the array (UBI reports an empty device) and all writes\nfail with -EIO because the OTP area is write protected. On this board\nthat makes the whole flash unusable and the device unbootable.\n\nWrite the feature value into NAND_FLASH_FEATURES as part of the same\ntransaction, before NAND_EXEC_CMD. While at it, copy only the bytes the\noperation actually carries - the previous code dereferenced a 4-byte\npointer on a one-byte buffer (spinand-\u003escratchbuf).\n\nWith this patch the flash contents read back bit-identical to a\nknown-good dump of the same board taken under the vendor firmware\n(md5-verified across partitions), and writes work.",
  "id": "CVE-2026-80712",
  "modified": "2026-08-30T03:30:25.342423129Z",
  "published": "2026-08-28T06:53:11.243Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ba021079ef2ac6e21e3547328496ac42d22b56a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/581e5166f0780103dc91c0d8ebc801f9af4824b0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8fd62901d6bf03f274a49dd0060793cc07dd51b0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80712.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80712"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "spi: spi-qpic-snand: write the feature value before executing SET_FEATURE"
}