{"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"}}}}