159 lines
8.3 KiB
JSON
159 lines
8.3 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-2026-43461",
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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": "2026-05-01T14:12:56.010Z",
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"datePublished": "2026-05-08T14:22:23.999Z",
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"dateUpdated": "2026-08-05T12:28:05.393Z"
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"shortName": "Linux",
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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\nspi: amlogic: spifc-a4: Fix DMA mapping error handling\n\nFix three bugs in aml_sfc_dma_buffer_setup() error paths:\n1. Unnecessary goto: When the first DMA mapping (sfc->daddr) fails,\n nothing needs cleanup. Use direct return instead of goto.\n2. Double-unmap bug: When info DMA mapping failed, the code would\n unmap sfc->daddr inline, then fall through to out_map_data which\n would unmap it again, causing a double-unmap.\n3. Wrong unmap size: The out_map_info label used datalen instead of\n infolen when unmapping sfc->iaddr, which could lead to incorrect\n DMA sync behavior."
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}
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{
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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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{
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"lang": "en",
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"value": "AV:L - The vulnerable path is reached through local storage I/O to an Amlogic SPI-NAND/SPI-NOR controller via MTD/SPI-mem operations, not through an in-kernel network protocol.\nAC:L - There is no race to win; an attacker who can cause repeated flash reads/writes can exercise the DMA mapping error paths, and uncertainty about inducing mapping failure is resolved toward the higher-severity low-complexity value.\nPR:L - A low-privileged local user can plausibly trigger flash-backed filesystem or MTD read paths on affected embedded systems without kernel capabilities, even though direct raw MTD writes may be further restricted.\nUI:N - Exploitation is initiated by the attacker’s own local I/O and does not require a separate victim action.\nS:U - The impact remains within the kernel and device DMA management security authority; this is not a VM escape or crossing into a different authorization scope.\nC:H - The bad cleanup can double-unmap or over-unmap DMA/IOMMU mappings, plausibly creating stale or overlapping DMA mappings that can expose kernel memory.\nI:H - Corrupt DMA mapping bookkeeping can plausibly allow DMA aliasing or writes into unintended kernel memory, so integrity impact is high under the required higher-severity rule.\nA:H - Invalid, double, or wrong-sized DMA unmaps can trigger warnings, IOMMU/DMA allocator corruption, or crashes/hangs in kernel I/O paths."
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}
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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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"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/spi/spi-amlogic-spifc-a4.c"
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"version": "7.0",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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"references": [
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"title": "spi: amlogic: spifc-a4: Fix DMA mapping error handling",
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