201 lines
11 KiB
JSON
201 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2023-54104",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-12-24T13:02:52.517Z",
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"datePublished": "2025-12-24T13:06:29.354Z",
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"dateUpdated": "2026-08-05T09:17:18.597Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T09:17:18.597Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/mtd/nand/raw/fsl_upm.c"
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],
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"versions": [
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{
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"version": "54309d65776755bcdb9dcf3744cd764fc1e254ea",
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"lessThan": "1f09d67d390647f83f8f9d26382b0daa43756e6f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "54309d65776755bcdb9dcf3744cd764fc1e254ea",
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"lessThan": "eb7a5e4d14c8659cb97db6863316280e15f67209",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "54309d65776755bcdb9dcf3744cd764fc1e254ea",
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"lessThan": "f4b700c71802c81e6f9dce362ee7a0312c8377ba",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "54309d65776755bcdb9dcf3744cd764fc1e254ea",
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"lessThan": "49e57caf967a969f6b955c88805f2d160910aa12",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "54309d65776755bcdb9dcf3744cd764fc1e254ea",
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"lessThan": "c6abce60338aa2080973cd95be0aedad528bb41f",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/mtd/nand/raw/fsl_upm.c"
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],
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"versions": [
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{
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"version": "5.9",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.9",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.190",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.126",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.45",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.4.10",
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"lessThanOrEqual": "6.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.5",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.9",
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"versionEndExcluding": "5.10.190"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/1f09d67d390647f83f8f9d26382b0daa43756e6f"
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},
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{
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"url": "https://git.kernel.org/stable/c/eb7a5e4d14c8659cb97db6863316280e15f67209"
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},
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{
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"url": "https://git.kernel.org/stable/c/f4b700c71802c81e6f9dce362ee7a0312c8377ba"
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},
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{
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"url": "https://git.kernel.org/stable/c/49e57caf967a969f6b955c88805f2d160910aa12"
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},
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{
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"url": "https://git.kernel.org/stable/c/c6abce60338aa2080973cd95be0aedad528bb41f"
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}
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],
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"title": "mtd: rawnand: fsl_upm: Fix an off-by one test in fun_exec_op()",
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