{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80712",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.788Z",
        "datePublished": "2026-08-28T06:53:11.243Z",
        "dateUpdated": "2026-08-28T06:53:11.243Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-28T06:53:11.243Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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->scratchbuf).\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."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/spi/spi-qpic-snand.c"
                    ],
                    "versions": [
                        {
                            "version": "7304d1909080ef0c9da703500a97f46c98393fcd",
                            "lessThan": "581e5166f0780103dc91c0d8ebc801f9af4824b0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7304d1909080ef0c9da703500a97f46c98393fcd",
                            "lessThan": "3ba021079ef2ac6e21e3547328496ac42d22b56a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7304d1909080ef0c9da703500a97f46c98393fcd",
                            "lessThan": "8fd62901d6bf03f274a49dd0060793cc07dd51b0",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/spi/spi-qpic-snand.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.44",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.8",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "6.18.44"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "7.1.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/581e5166f0780103dc91c0d8ebc801f9af4824b0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3ba021079ef2ac6e21e3547328496ac42d22b56a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8fd62901d6bf03f274a49dd0060793cc07dd51b0"
                }
            ],
            "title": "spi: spi-qpic-snand: write the feature value before executing SET_FEATURE",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}