{
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndma-buf: heaps: Fix off-by-one in CMA heap fault handler\n\nUntil VM_DONTEXPAND was added in commit 1c1914d6e8c6 (\"dma-buf: heaps:\nDon\u0027t track CMA dma-buf pages under RssFile\") it was possible to obtain\na mapping larger than the buffer size via mremap and bypass the overflow\ncheck in dma_buf_mmap_internal. When using such a mapping to attempt to\nfault past the end of the buffer, the CMA heap fault handler also checks\nthe fault offset against the buffer size, but gets the boundary wrong by\n1. Fix the boundary check so that we don\u0027t read off the end of the pages\narray and insert an arbitrary page in the mapping."
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      "metrics": [
        {
          "cvssV3_1": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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              "value": "AV:L - Exploitation requires local access to the `/dev/dma_heap/\u003ccma-heap\u003e` character device, an ioctl to allocate the buffer, and mmap/mremap/page-fault activity from a local process. No network or physical component is involved.\nAC:L - The off-by-one is deterministic \u2014 allocate a buffer, mmap it at full size, grow it with mremap (unblocked before v6.8), then touch the page at offset `pagecount`. Buffer size is attacker-chosen, so the slab layout used to control the adjacent `struct page *` can be groomed reliably.\nPR:L - No capability check exists anywhere on the path (`dma_heap_open`/`dma_heap_ioctl_allocate`/`cma_heap_allocate`); only DAC permission on the heap device node is needed, which on the dominant deployment for CMA heaps (Android/embedded ARM) is granted to ordinary unprivileged app and media processes.\nUI:N - The attacking process performs every step itself \u2014 open, ioctl, mmap, mremap, memory access. No victim action or cooperation is required.\nS:U - The corruption and the resulting privilege gain are entirely within the kernel\u0027s own security authority; no VM, IOMMU, or hypervisor boundary is crossed.\nC:H - Beyond the 8-byte out-of-bounds slab read, the handler installs the forged `struct page` into the faulting process\u0027s page tables, giving userspace a direct read mapping of an arbitrary physical page \u2014 arbitrary kernel and cross-process memory disclosure.\nI:H - The VMA is `MAP_SHARED` with no `page_mkwrite`, so `finish_fault()` installs a writable PTE for the arbitrary page, yielding an arbitrary physical-memory write; `get_page()` additionally increments a refcount at an attacker-influenced address. Both are readily leveraged into control-flow hijack and root.\nA:H - Dereferencing an out-of-bounds `struct page *` and inserting a bogus PFN into a mapping causes oops/panic and refcount corruption of unrelated pages, and the attacker can repeat it at will."
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          "url": "https://git.kernel.org/stable/c/84175dc5b2c932266a50c04e5ce342c30f817a2f"
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          "url": "https://git.kernel.org/stable/c/eb7fc8b65cea22f9038c52398c8b22849e9620ea"
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        {
          "url": "https://git.kernel.org/stable/c/ea5ff5d351b520524019f7ff7f9ce418de2dad87"
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      "title": "dma-buf: heaps: Fix off-by-one in CMA heap fault handler",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-46852",
    "datePublished": "2024-09-27T12:42:45.336Z",
    "dateReserved": "2024-09-11T15:12:18.290Z",
    "dateUpdated": "2026-08-05T11:39:01.066Z",
    "state": "PUBLISHED"
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{
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          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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      {
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          "dateUpdated": "2025-11-03T22:19:38.858Z",
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              "versionType": "git"
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          "vendor": "Linux",
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "6.10.11",
              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "6.11",
              "versionType": "original_commit_for_fix"
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                {
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: nxp-fspi: fix the KASAN report out-of-bounds bug\n\nChange the memcpy length to fix the out-of-bounds issue when writing the\ndata that is not 4 byte aligned to TX FIFO.\n\nTo reproduce the issue, write 3 bytes data to NOR chip.\n\ndd if=3b of=/dev/mtd0\n[   36.926103] ==================================================================\n[   36.933409] BUG: KASAN: slab-out-of-bounds in nxp_fspi_exec_op+0x26ec/0x2838\n[   36.940514] Read of size 4 at addr ffff00081037c2a0 by task dd/455\n[   36.946721]\n[   36.948235] CPU: 3 UID: 0 PID: 455 Comm: dd Not tainted 6.11.0-rc5-gc7b0e37c8434 #1070\n[   36.956185] Hardware name: Freescale i.MX8QM MEK (DT)\n[   36.961260] Call trace:\n[   36.963723]  dump_backtrace+0x90/0xe8\n[   36.967414]  show_stack+0x18/0x24\n[   36.970749]  dump_stack_lvl+0x78/0x90\n[   36.974451]  print_report+0x114/0x5cc\n[   36.978151]  kasan_report+0xa4/0xf0\n[   36.981670]  __asan_report_load_n_noabort+0x1c/0x28\n[   36.986587]  nxp_fspi_exec_op+0x26ec/0x2838\n[   36.990800]  spi_mem_exec_op+0x8ec/0xd30\n[   36.994762]  spi_mem_no_dirmap_read+0x190/0x1e0\n[   36.999323]  spi_mem_dirmap_write+0x238/0x32c\n[   37.003710]  spi_nor_write_data+0x220/0x374\n[   37.007932]  spi_nor_write+0x110/0x2e8\n[   37.011711]  mtd_write_oob_std+0x154/0x1f0\n[   37.015838]  mtd_write_oob+0x104/0x1d0\n[   37.019617]  mtd_write+0xb8/0x12c\n[   37.022953]  mtdchar_write+0x224/0x47c\n[   37.026732]  vfs_write+0x1e4/0x8c8\n[   37.030163]  ksys_write+0xec/0x1d0\n[   37.033586]  __arm64_sys_write+0x6c/0x9c\n[   37.037539]  invoke_syscall+0x6c/0x258\n[   37.041327]  el0_svc_common.constprop.0+0x160/0x22c\n[   37.046244]  do_el0_svc+0x44/0x5c\n[   37.049589]  el0_svc+0x38/0x78\n[   37.052681]  el0t_64_sync_handler+0x13c/0x158\n[   37.057077]  el0t_64_sync+0x190/0x194\n[   37.060775]\n[   37.062274] Allocated by task 455:\n[   37.065701]  kasan_save_stack+0x2c/0x54\n[   37.069570]  kasan_save_track+0x20/0x3c\n[   37.073438]  kasan_save_alloc_info+0x40/0x54\n[   37.077736]  __kasan_kmalloc+0xa0/0xb8\n[   37.081515]  __kmalloc_noprof+0x158/0x2f8\n[   37.085563]  mtd_kmalloc_up_to+0x120/0x154\n[   37.089690]  mtdchar_write+0x130/0x47c\n[   37.093469]  vfs_write+0x1e4/0x8c8\n[   37.096901]  ksys_write+0xec/0x1d0\n[   37.100332]  __arm64_sys_write+0x6c/0x9c\n[   37.104287]  invoke_syscall+0x6c/0x258\n[   37.108064]  el0_svc_common.constprop.0+0x160/0x22c\n[   37.112972]  do_el0_svc+0x44/0x5c\n[   37.116319]  el0_svc+0x38/0x78\n[   37.119401]  el0t_64_sync_handler+0x13c/0x158\n[   37.123788]  el0t_64_sync+0x190/0x194\n[   37.127474]\n[   37.128977] The buggy address belongs to the object at ffff00081037c2a0\n[   37.128977]  which belongs to the cache kmalloc-8 of size 8\n[   37.141177] The buggy address is located 0 bytes inside of\n[   37.141177]  allocated 3-byte region [ffff00081037c2a0, ffff00081037c2a3)\n[   37.153465]\n[   37.154971] The buggy address belongs to the physical page:\n[   37.160559] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x89037c\n[   37.168596] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff)\n[   37.175149] page_type: 0xfdffffff(slab)\n[   37.179021] raw: 0bfffe0000000000 ffff000800002500 dead000000000122 0000000000000000\n[   37.186788] raw: 0000000000000000 0000000080800080 00000001fdffffff 0000000000000000\n[   37.194553] page dumped because: kasan: bad access detected\n[   37.200144]\n[   37.201647] Memory state around the buggy address:\n[   37.206460]  ffff00081037c180: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc\n[   37.213701]  ffff00081037c200: fa fc fc fc 05 fc fc fc 03 fc fc fc 02 fc fc fc\n[   37.220946] \u003effff00081037c280: 06 fc fc fc 03 fc fc fc fc fc fc fc fc fc fc fc\n[   37.228186]                                ^\n[   37.232473]  ffff00081037c300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n[   37.239718]  ffff00081037c380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n[   37.246962] ==============================================================\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:37:48.946Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aa05db44db5f409f6d91c27b5737efb49fb45d9f"
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