{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-54104", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-24T13:02:52.517Z", "datePublished": "2025-12-24T13:06:29.354Z", "dateUpdated": "2026-08-05T09:17:18.597Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:17:18.597Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: rawnand: fsl_upm: Fix an off-by one test in fun_exec_op()\n\n'op-cs' is copied in 'fun->mchip_number' which is used to access the\n'mchip_offsets' and the 'rnb_gpio' arrays.\nThese arrays have NAND_MAX_CHIPS elements, so the index must be below this\nlimit.\n\nFix the sanity check in order to avoid the NAND_MAX_CHIPS value. This\nwould lead to out-of-bound accesses." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The fsl_upm NAND controller is reached only through the local MTD stack — /dev/mtdX ioctls or file I/O on a NAND-backed JFFS2/UBIFS volume. There is no network or remote-peer input into this driver.\nAC:L - There is no race, no memory-layout requirement, and no timing window; the faulty bounds check is the only guard on the index, and NAND operations can be driven repeatedly and deterministically by ordinary filesystem traffic.\nPR:L - An unprivileged local user reading or writing files on a mounted NAND-backed filesystem drives nand_exec_op() and thus fun_exec_op(); direct /dev/mtdX access is not required, so real root is not needed.\nUI:N - The code path executes as part of routine NAND I/O initiated by the attacker; no action by any other user or administrator is required.\nS:U - The out-of-bounds accesses stay within the kernel's own security authority — corrupted state and the wild pointer belong to the same kernel, with no VM, IOMMU, or sandbox boundary crossed.\nC:H - The out-of-bounds index yields an unintended reg_offs, so in_8() reads localbus MMIO outside the intended chip window straight into the caller's data buffer, and the adjacent struct field is read as a pointer — an out-of-bounds read that can disclose kernel and device state.\nI:H - The same bogus reg_offs is used by out_8() in the NAND_OP_DATA_OUT path, producing attacker-influenced writes to localbus registers outside the intended window; out-of-bounds writes are scored High.\nA:H - fun->rnb_gpio[NAND_MAX_CHIPS] reads adjacent struct data as a struct gpio_desc pointer and dereferences it in gpiod_get_value_cansleep(), and the bogus MMIO offset can hit unmapped localbus space — either results in a kernel oops." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/mtd/nand/raw/fsl_upm.c" ], "versions": [ { "version": "54309d65776755bcdb9dcf3744cd764fc1e254ea", "lessThan": "1f09d67d390647f83f8f9d26382b0daa43756e6f", "status": "affected", "versionType": "git" }, { "version": "54309d65776755bcdb9dcf3744cd764fc1e254ea", "lessThan": "eb7a5e4d14c8659cb97db6863316280e15f67209", "status": "affected", "versionType": "git" }, { "version": "54309d65776755bcdb9dcf3744cd764fc1e254ea", "lessThan": "f4b700c71802c81e6f9dce362ee7a0312c8377ba", "status": "affected", "versionType": "git" }, { "version": "54309d65776755bcdb9dcf3744cd764fc1e254ea", "lessThan": "49e57caf967a969f6b955c88805f2d160910aa12", "status": "affected", "versionType": "git" }, { "version": "54309d65776755bcdb9dcf3744cd764fc1e254ea", "lessThan": "c6abce60338aa2080973cd95be0aedad528bb41f", "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/mtd/nand/raw/fsl_upm.c" ], "versions": [ { "version": "5.9", "status": "affected" }, { "version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.190", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.126", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.45", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4.10", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5", "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": "5.9", "versionEndExcluding": "5.10.190" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.126" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.1.45" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.4.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.5" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/1f09d67d390647f83f8f9d26382b0daa43756e6f" }, { "url": "https://git.kernel.org/stable/c/eb7a5e4d14c8659cb97db6863316280e15f67209" }, { "url": "https://git.kernel.org/stable/c/f4b700c71802c81e6f9dce362ee7a0312c8377ba" }, { "url": "https://git.kernel.org/stable/c/49e57caf967a969f6b955c88805f2d160910aa12" }, { "url": "https://git.kernel.org/stable/c/c6abce60338aa2080973cd95be0aedad528bb41f" } ], "title": "mtd: rawnand: fsl_upm: Fix an off-by one test in fun_exec_op()", "x_generator": { "engine": "bippy-1.2.0" } } } }