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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: Fix a slab-out-of-bounds write bug in udf_find_entry()\n\nSyzbot reported a slab-out-of-bounds Write bug:\n\nloop0: detected capacity change from 0 to 2048\n==================================================================\nBUG: KASAN: slab-out-of-bounds in udf_find_entry+0x8a5/0x14f0\nfs/udf/namei.c:253\nWrite of size 105 at addr ffff8880123ff896 by task syz-executor323/3610\n\nCPU: 0 PID: 3610 Comm: syz-executor323 Not tainted\n6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0\nHardware name: Google Compute Engine/Google Compute Engine, BIOS\nGoogle 10/11/2022\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106\n print_address_description+0x74/0x340 mm/kasan/report.c:284\n print_report+0x107/0x1f0 mm/kasan/report.c:395\n kasan_report+0xcd/0x100 mm/kasan/report.c:495\n kasan_check_range+0x2a7/0x2e0 mm/kasan/generic.c:189\n memcpy+0x3c/0x60 mm/kasan/shadow.c:66\n udf_find_entry+0x8a5/0x14f0 fs/udf/namei.c:253\n udf_lookup+0xef/0x340 fs/udf/namei.c:309\n lookup_open fs/namei.c:3391 [inline]\n open_last_lookups fs/namei.c:3481 [inline]\n path_openat+0x10e6/0x2df0 fs/namei.c:3710\n do_filp_open+0x264/0x4f0 fs/namei.c:3740\n do_sys_openat2+0x124/0x4e0 fs/open.c:1310\n do_sys_open fs/open.c:1326 [inline]\n __do_sys_creat fs/open.c:1402 [inline]\n __se_sys_creat fs/open.c:1396 [inline]\n __x64_sys_creat+0x11f/0x160 fs/open.c:1396\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7ffab0d164d9\nCode: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89\nf7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01\nf0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffe1a7e6bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffab0d164d9\nRDX: 00007ffab0d164d9 RSI: 0000000000000000 RDI: 0000000020000180\nRBP: 00007ffab0cd5a10 R08: 0000000000000000 R09: 0000000000000000\nR10: 00005555573552c0 R11: 0000000000000246 R12: 00007ffab0cd5aa0\nR13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n \u003c/TASK\u003e\n\nAllocated by task 3610:\n kasan_save_stack mm/kasan/common.c:45 [inline]\n kasan_set_track+0x3d/0x60 mm/kasan/common.c:52\n ____kasan_kmalloc mm/kasan/common.c:371 [inline]\n __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380\n kmalloc include/linux/slab.h:576 [inline]\n udf_find_entry+0x7b6/0x14f0 fs/udf/namei.c:243\n udf_lookup+0xef/0x340 fs/udf/namei.c:309\n lookup_open fs/namei.c:3391 [inline]\n open_last_lookups fs/namei.c:3481 [inline]\n path_openat+0x10e6/0x2df0 fs/namei.c:3710\n do_filp_open+0x264/0x4f0 fs/namei.c:3740\n do_sys_openat2+0x124/0x4e0 fs/open.c:1310\n do_sys_open fs/open.c:1326 [inline]\n __do_sys_creat fs/open.c:1402 [inline]\n __se_sys_creat fs/open.c:1396 [inline]\n __x64_sys_creat+0x11f/0x160 fs/open.c:1396\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThe buggy address belongs to the object at ffff8880123ff800\n which belongs to the cache kmalloc-256 of size 256\nThe buggy address is located 150 bytes inside of\n 256-byte region [ffff8880123ff800, ffff8880123ff900)\n\nThe buggy address belongs to the physical page:\npage:ffffea000048ff80 refcount:1 mapcount:0 mapping:0000000000000000\nindex:0x0 pfn:0x123fe\nhead:ffffea000048ff80 order:1 compound_mapcount:0 compound_pincount:0\nflags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)\nraw: 00fff00000010200 ffffea00004b8500 dead000000000003 ffff888012041b40\nraw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\npage_owner tracks the page as allocated\npage last allocated via order 0, migratetype Unmovable, gfp_mask 0x0(),\npid 1, tgid 1 (swapper/0), ts 1841222404, free_ts 0\n create_dummy_stack mm/page_owner.c:\n---truncated---"
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              "value": "AV:L - The bug is reached only through local VFS lookup on a mounted UDF volume (creat/open \u2192 path_openat \u2192 udf_lookup \u2192 udf_find_entry); UDF has no network-facing entry path, and loop/udisks mount of a crafted image makes Local appropriate over Physical.\nAC:L - An attacker who crafts a UDF image with a file identifier split across blocks and lengthFileIdent=255 deterministically hits the undersized kmalloc(UDF_NAME_LEN) memcpy path with no race or attacker-uncontrollable precondition.\nPR:L - UDF lacks FS_USERNS_MOUNT so raw mount needs CAP_SYS_ADMIN, but default UDisks/polkit policy lets an active unprivileged user mount removable or loop-backed UDF media and then trigger lookup, matching CVE-2022-50755 and CVE-2026-64324.\nUI:N - The attacking local user can mount their own crafted UDF image via UDisks and issue open/creat/lookup themselves; no separate victim action is required.\nS:U - The slab out-of-bounds write corrupts host kernel heap within the same OS security authority; this is ordinary same-host kernel impact, not a VM/IOMMU/sandbox boundary cross.\nC:H - This is a slab out-of-bounds write of attacker-controlled on-disk name bytes into a kmalloc object; per kernel guidance such heap memory corruption is leverageable for information disclosure.\nI:H - The fixed path is an out-of-bounds write (CWE-787) of up to one attacker-controlled byte past the allocated copy_name buffer during FID reassembly, which is scored as High integrity for heap memory corruption.\nA:H - The slab-out-of-bounds write is a memory-safety violation that can oops/panic under KASAN or hardened allocators and otherwise corrupts adjacent heap state, fully denying availability."
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    "dateReserved": "2025-05-01T14:05:17.230Z",
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              "value": "AV:L - The UCSI core is a local platform driver (ACPI OpRegion, I2C, or pmic_glink transport) with no network or adjacent-network exposure; the over-read is driven by local UCSI transactions and the leaked bytes are harvested locally through /sys/class/typec and /sys/class/power_supply attributes or the UCSI debugfs response file.\nAC:L - There is no race and no dependence on memory layout the attacker cannot influence \u2014 any UCSI command requesting more than 16 bytes on a PPM reporting version \u22641.2 deterministically reads past the MESSAGE_IN window, and UCSI 1.x PPMs were the common case on shipping hardware.\nPR:L - The typec class attributes populated from the over-read buffers (usb_power_delivery_revision, number_of_alternate_modes, power_operation_mode, supported_accessory_modes) and the ucsi power-supply properties derived from src_pdos are all DEVICE_ATTR_RO/0444, so an ordinary unprivileged local user can read the disclosed bytes; no capability or root is required to observe the leak.\nUI:N - The oversized MESSAGE_IN reads are issued by the driver itself during registration, resume, and connector-change work handling; no victim action is needed for the out-of-bounds access to occur or for its results to be exposed.\nS:U - The out-of-bounds read stays within the kernel\u0027s own memory (memremap\u0027d OpRegion, or the slab objects backing struct pmic_glink_ucsi / struct ucsi_ccg) and is consumed by the same kernel; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Up to 240 bytes beyond the 16-byte MESSAGE_IN window can be copied out \u2014 past read_buf[48] inside struct pmic_glink_ucsi, past the trailing op_data member of struct ucsi_ccg, or past the ACPI OpRegion \u2014 which is far more than a strictly bounded few-byte read and can expose adjacent heap contents (including pointers) through world-readable sysfs.\nI:N - The defect is purely an over-long read; every destination buffer is sized to the requested length, so no out-of-bounds write, allocation-size confusion, or control-flow corruption primitive is created.\nA:H - Reading hundreds of bytes past the end of a memremap\u0027d ACPI/MMIO OpRegion can fault on platforms where the mapping does not extend that far, and the slab over-reads in the ccg and glink backends trip KASAN, so the bug can take the machine down."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:31:01.698Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/266f403ec47573046dee4bcebda82777ce702c40"
        },
        {
          "url": "https://git.kernel.org/stable/c/0defcaa09d3b21e8387829ee3a652c43fa91e13f"
        },
        {
          "url": "https://git.kernel.org/stable/c/b3db266fb031fba88c423d4bb8983a73a3db6527"
        }
      ],
      "title": "usb: typec: ucsi: Limit read size on v1.2",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-35924",
    "datePublished": "2024-05-19T10:10:35.044Z",
    "dateReserved": "2024-05-17T13:50:33.125Z",
    "dateUpdated": "2026-08-05T11:31:01.698Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}