CVE-2025-40088 (GCVE-0-2025-40088)

Vulnerability from cvelistv5 – Published: 2025-10-30 09:47 – Updated: 2026-08-05 12:07
VLAI
Title
hfsplus: fix slab-out-of-bounds read in hfsplus_strcasecmp()
Summary
In the Linux kernel, the following vulnerability has been resolved: hfsplus: fix slab-out-of-bounds read in hfsplus_strcasecmp() The hfsplus_strcasecmp() logic can trigger the issue: [ 117.317703][ T9855] ================================================================== [ 117.318353][ T9855] BUG: KASAN: slab-out-of-bounds in hfsplus_strcasecmp+0x1bc/0x490 [ 117.318991][ T9855] Read of size 2 at addr ffff88802160f40c by task repro/9855 [ 117.319577][ T9855] [ 117.319773][ T9855] CPU: 0 UID: 0 PID: 9855 Comm: repro Not tainted 6.17.0-rc6 #33 PREEMPT(full) [ 117.319780][ T9855] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 117.319783][ T9855] Call Trace: [ 117.319785][ T9855] <TASK> [ 117.319788][ T9855] dump_stack_lvl+0x1c1/0x2a0 [ 117.319795][ T9855] ? __virt_addr_valid+0x1c8/0x5c0 [ 117.319803][ T9855] ? __pfx_dump_stack_lvl+0x10/0x10 [ 117.319808][ T9855] ? rcu_is_watching+0x15/0xb0 [ 117.319816][ T9855] ? lock_release+0x4b/0x3e0 [ 117.319821][ T9855] ? __kasan_check_byte+0x12/0x40 [ 117.319828][ T9855] ? __virt_addr_valid+0x1c8/0x5c0 [ 117.319835][ T9855] ? __virt_addr_valid+0x4a5/0x5c0 [ 117.319842][ T9855] print_report+0x17e/0x7e0 [ 117.319848][ T9855] ? __virt_addr_valid+0x1c8/0x5c0 [ 117.319855][ T9855] ? __virt_addr_valid+0x4a5/0x5c0 [ 117.319862][ T9855] ? __phys_addr+0xd3/0x180 [ 117.319869][ T9855] ? hfsplus_strcasecmp+0x1bc/0x490 [ 117.319876][ T9855] kasan_report+0x147/0x180 [ 117.319882][ T9855] ? hfsplus_strcasecmp+0x1bc/0x490 [ 117.319891][ T9855] hfsplus_strcasecmp+0x1bc/0x490 [ 117.319900][ T9855] ? __pfx_hfsplus_cat_case_cmp_key+0x10/0x10 [ 117.319906][ T9855] hfs_find_rec_by_key+0xa9/0x1e0 [ 117.319913][ T9855] __hfsplus_brec_find+0x18e/0x470 [ 117.319920][ T9855] ? __pfx_hfsplus_bnode_find+0x10/0x10 [ 117.319926][ T9855] ? __pfx_hfs_find_rec_by_key+0x10/0x10 [ 117.319933][ T9855] ? __pfx___hfsplus_brec_find+0x10/0x10 [ 117.319942][ T9855] hfsplus_brec_find+0x28f/0x510 [ 117.319949][ T9855] ? __pfx_hfs_find_rec_by_key+0x10/0x10 [ 117.319956][ T9855] ? __pfx_hfsplus_brec_find+0x10/0x10 [ 117.319963][ T9855] ? __kmalloc_noprof+0x2a9/0x510 [ 117.319969][ T9855] ? hfsplus_find_init+0x8c/0x1d0 [ 117.319976][ T9855] hfsplus_brec_read+0x2b/0x120 [ 117.319983][ T9855] hfsplus_lookup+0x2aa/0x890 [ 117.319990][ T9855] ? __pfx_hfsplus_lookup+0x10/0x10 [ 117.320003][ T9855] ? d_alloc_parallel+0x2f0/0x15e0 [ 117.320008][ T9855] ? __lock_acquire+0xaec/0xd80 [ 117.320013][ T9855] ? __pfx_d_alloc_parallel+0x10/0x10 [ 117.320019][ T9855] ? __raw_spin_lock_init+0x45/0x100 [ 117.320026][ T9855] ? __init_waitqueue_head+0xa9/0x150 [ 117.320034][ T9855] __lookup_slow+0x297/0x3d0 [ 117.320039][ T9855] ? __pfx___lookup_slow+0x10/0x10 [ 117.320045][ T9855] ? down_read+0x1ad/0x2e0 [ 117.320055][ T9855] lookup_slow+0x53/0x70 [ 117.320065][ T9855] walk_component+0x2f0/0x430 [ 117.320073][ T9855] path_lookupat+0x169/0x440 [ 117.320081][ T9855] filename_lookup+0x212/0x590 [ 117.320089][ T9855] ? __pfx_filename_lookup+0x10/0x10 [ 117.320098][ T9855] ? strncpy_from_user+0x150/0x290 [ 117.320105][ T9855] ? getname_flags+0x1e5/0x540 [ 117.320112][ T9855] user_path_at+0x3a/0x60 [ 117.320117][ T9855] __x64_sys_umount+0xee/0x160 [ 117.320123][ T9855] ? __pfx___x64_sys_umount+0x10/0x10 [ 117.320129][ T9855] ? do_syscall_64+0xb7/0x3a0 [ 117.320135][ T9855] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 117.320141][ T9855] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 117.320145][ T9855] do_syscall_64+0xf3/0x3a0 [ 117.320150][ T9855] ? exc_page_fault+0x9f/0xf0 [ 117.320154][ T9855] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 117.320158][ T9855] RIP: 0033:0x7f7dd7908b07 [ 117.320163][ T9855] Code: 23 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 08 [ 117.320167][ T9855] RSP: 002b:00007ffd5ebd9698 EFLAGS: 00000202 ---truncated---
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 603158d4efa98a13a746bd586c20f194f4a31ec8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ef250c3edd995d7bb5a5e5122ffad1c28a8686eb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7ab44236b32ed41eb0636797e8e8e885a2f3b18a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b47a75b6f762321f9eb6f31aab7bce47a37063b7 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4f5ab4a9c6abd8b0d713cc2b7b041bc10d70f241 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 586c75dfd1d265c4150f6529debb85c9d62e101f (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4bc081ba6c52b0c88c92701e3fbc33c7e2277afb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 42520df65bf67189541a425f7d36b0b3e7bd7844 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.4.301 , ≤ 5.4.* (semver)
Unaffected: 5.10.246 , ≤ 5.10.* (semver)
Unaffected: 5.15.196 , ≤ 5.15.* (semver)
Unaffected: 6.1.158 , ≤ 6.1.* (semver)
Unaffected: 6.6.114 , ≤ 6.6.* (semver)
Unaffected: 6.12.55 , ≤ 6.12.* (semver)
Unaffected: 6.17.5 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.246",
              "versionType": "semver"
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              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.196",
              "versionType": "semver"
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              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.158",
              "versionType": "semver"
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              "versionType": "semver"
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              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfsplus: fix slab-out-of-bounds read in hfsplus_strcasecmp()\n\nThe hfsplus_strcasecmp() logic can trigger the issue:\n\n[  117.317703][ T9855] ==================================================================\n[  117.318353][ T9855] BUG: KASAN: slab-out-of-bounds in hfsplus_strcasecmp+0x1bc/0x490\n[  117.318991][ T9855] Read of size 2 at addr ffff88802160f40c by task repro/9855\n[  117.319577][ T9855]\n[  117.319773][ T9855] CPU: 0 UID: 0 PID: 9855 Comm: repro Not tainted 6.17.0-rc6 #33 PREEMPT(full)\n[  117.319780][ T9855] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[  117.319783][ T9855] Call Trace:\n[  117.319785][ T9855]  \u003cTASK\u003e\n[  117.319788][ T9855]  dump_stack_lvl+0x1c1/0x2a0\n[  117.319795][ T9855]  ? __virt_addr_valid+0x1c8/0x5c0\n[  117.319803][ T9855]  ? __pfx_dump_stack_lvl+0x10/0x10\n[  117.319808][ T9855]  ? rcu_is_watching+0x15/0xb0\n[  117.319816][ T9855]  ? lock_release+0x4b/0x3e0\n[  117.319821][ T9855]  ? __kasan_check_byte+0x12/0x40\n[  117.319828][ T9855]  ? __virt_addr_valid+0x1c8/0x5c0\n[  117.319835][ T9855]  ? __virt_addr_valid+0x4a5/0x5c0\n[  117.319842][ T9855]  print_report+0x17e/0x7e0\n[  117.319848][ T9855]  ? __virt_addr_valid+0x1c8/0x5c0\n[  117.319855][ T9855]  ? __virt_addr_valid+0x4a5/0x5c0\n[  117.319862][ T9855]  ? __phys_addr+0xd3/0x180\n[  117.319869][ T9855]  ? hfsplus_strcasecmp+0x1bc/0x490\n[  117.319876][ T9855]  kasan_report+0x147/0x180\n[  117.319882][ T9855]  ? hfsplus_strcasecmp+0x1bc/0x490\n[  117.319891][ T9855]  hfsplus_strcasecmp+0x1bc/0x490\n[  117.319900][ T9855]  ? __pfx_hfsplus_cat_case_cmp_key+0x10/0x10\n[  117.319906][ T9855]  hfs_find_rec_by_key+0xa9/0x1e0\n[  117.319913][ T9855]  __hfsplus_brec_find+0x18e/0x470\n[  117.319920][ T9855]  ? __pfx_hfsplus_bnode_find+0x10/0x10\n[  117.319926][ T9855]  ? __pfx_hfs_find_rec_by_key+0x10/0x10\n[  117.319933][ T9855]  ? __pfx___hfsplus_brec_find+0x10/0x10\n[  117.319942][ T9855]  hfsplus_brec_find+0x28f/0x510\n[  117.319949][ T9855]  ? __pfx_hfs_find_rec_by_key+0x10/0x10\n[  117.319956][ T9855]  ? __pfx_hfsplus_brec_find+0x10/0x10\n[  117.319963][ T9855]  ? __kmalloc_noprof+0x2a9/0x510\n[  117.319969][ T9855]  ? hfsplus_find_init+0x8c/0x1d0\n[  117.319976][ T9855]  hfsplus_brec_read+0x2b/0x120\n[  117.319983][ T9855]  hfsplus_lookup+0x2aa/0x890\n[  117.319990][ T9855]  ? __pfx_hfsplus_lookup+0x10/0x10\n[  117.320003][ T9855]  ? d_alloc_parallel+0x2f0/0x15e0\n[  117.320008][ T9855]  ? __lock_acquire+0xaec/0xd80\n[  117.320013][ T9855]  ? __pfx_d_alloc_parallel+0x10/0x10\n[  117.320019][ T9855]  ? __raw_spin_lock_init+0x45/0x100\n[  117.320026][ T9855]  ? __init_waitqueue_head+0xa9/0x150\n[  117.320034][ T9855]  __lookup_slow+0x297/0x3d0\n[  117.320039][ T9855]  ? __pfx___lookup_slow+0x10/0x10\n[  117.320045][ T9855]  ? down_read+0x1ad/0x2e0\n[  117.320055][ T9855]  lookup_slow+0x53/0x70\n[  117.320065][ T9855]  walk_component+0x2f0/0x430\n[  117.320073][ T9855]  path_lookupat+0x169/0x440\n[  117.320081][ T9855]  filename_lookup+0x212/0x590\n[  117.320089][ T9855]  ? __pfx_filename_lookup+0x10/0x10\n[  117.320098][ T9855]  ? strncpy_from_user+0x150/0x290\n[  117.320105][ T9855]  ? getname_flags+0x1e5/0x540\n[  117.320112][ T9855]  user_path_at+0x3a/0x60\n[  117.320117][ T9855]  __x64_sys_umount+0xee/0x160\n[  117.320123][ T9855]  ? __pfx___x64_sys_umount+0x10/0x10\n[  117.320129][ T9855]  ? do_syscall_64+0xb7/0x3a0\n[  117.320135][ T9855]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[  117.320141][ T9855]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[  117.320145][ T9855]  do_syscall_64+0xf3/0x3a0\n[  117.320150][ T9855]  ? exc_page_fault+0x9f/0xf0\n[  117.320154][ T9855]  entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[  117.320158][ T9855] RIP: 0033:0x7f7dd7908b07\n[  117.320163][ T9855] Code: 23 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 08\n[  117.320167][ T9855] RSP: 002b:00007ffd5ebd9698 EFLAGS: 00000202 \n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The attacker-controlled data is an on-disk HFS+ catalog key, and the vulnerable comparison is reached through local syscalls (`stat`/`open`/`umount` \u2192 `path_lookupat` \u2192 `hfsplus_lookup`) on a mounted volume; there is no network or peer-supplied input path. Local is scored rather than Physical because the mount can be arranged locally via loop device and the trigger is an ordinary local path lookup.\nAC:L - The `length` field of `struct hfsplus_unistr` is fully attacker-controlled in the crafted image and was used verbatim as the loop bound, so the out-of-bounds read fires deterministically on the first lookup \u2014 no race, no heap grooming, and no condition outside the attacker\u0027s control.\nPR:L - Nothing in `hfsplus_lookup`, `hfs_brec_find`, or `hfsplus_strcasecmp` performs any capability check \u2014 an unprivileged user who can traverse an already-mounted HFS+ volume (as in the reporter\u0027s reproducer, which trips the bug from a plain `umount` path walk) triggers it, and on desktop/kiosk systems udisks2 automounts an attacker-supplied HFS+ volume without the attacker holding any privilege.\nUI:N - In the automount scenario the volume is mounted by the system on device insertion with no victim action, and the attacker then triggers the read himself with an ordinary lookup on the mount point; choosing the higher-severity option where mount could otherwise be attributed to a victim.\nS:U - The out-of-bounds read, the corrupted comparison result, and any resulting fault are all contained within the kernel\u0027s own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The read is not bounded to a few bytes \u2014 with `length` up to 0xFFFF the loop can walk ~130 KB past the 1036-byte `kmalloc-2k` key allocation into adjacent heap objects, and the resulting comparison outcomes steer the B-tree binary search, giving an attacker-observable oracle over that out-of-bounds kernel heap data.\nI:N - `hfsplus_strcasecmp()` and `hfsplus_strcmp()` only dereference and compare; there is no out-of-bounds write, no type confusion, and no mechanism to modify kernel memory or hijack control flow.\nA:H - The unbounded read can walk off the end of the mapped slab region and fault, producing a kernel oops in the namei path, and on KASAN/KFENCE or `panic_on_warn`/`panic_on_oops` kernels it is a guaranteed panic; it also leaves the B-tree search returning inconsistent results and the filesystem unusable."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:07:41.220Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/603158d4efa98a13a746bd586c20f194f4a31ec8"
        },
        {
          "url": "https://git.kernel.org/stable/c/ef250c3edd995d7bb5a5e5122ffad1c28a8686eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/7ab44236b32ed41eb0636797e8e8e885a2f3b18a"
        },
        {
          "url": "https://git.kernel.org/stable/c/b47a75b6f762321f9eb6f31aab7bce47a37063b7"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f5ab4a9c6abd8b0d713cc2b7b041bc10d70f241"
        },
        {
          "url": "https://git.kernel.org/stable/c/586c75dfd1d265c4150f6529debb85c9d62e101f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4bc081ba6c52b0c88c92701e3fbc33c7e2277afb"
        },
        {
          "url": "https://git.kernel.org/stable/c/42520df65bf67189541a425f7d36b0b3e7bd7844"
        }
      ],
      "title": "hfsplus: fix slab-out-of-bounds read in hfsplus_strcasecmp()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40088",
    "datePublished": "2025-10-30T09:47:57.333Z",
    "dateReserved": "2025-04-16T07:20:57.162Z",
    "dateUpdated": "2026-08-05T12:07:41.220Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-40088",
      "date": "2026-08-05",
      "epss": "0.0014",
      "percentile": "0.0384"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40088\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-30T10:15:33.343\",\"lastModified\":\"2026-07-30T06:24:10.650\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nhfsplus: fix slab-out-of-bounds read in hfsplus_strcasecmp()\\n\\nThe hfsplus_strcasecmp() logic can trigger the issue:\\n\\n[  117.317703][ T9855] ==================================================================\\n[  117.318353][ T9855] BUG: KASAN: slab-out-of-bounds in hfsplus_strcasecmp+0x1bc/0x490\\n[  117.318991][ T9855] Read of size 2 at addr ffff88802160f40c by task repro/9855\\n[  117.319577][ T9855]\\n[  117.319773][ T9855] CPU: 0 UID: 0 PID: 9855 Comm: repro Not tainted 6.17.0-rc6 #33 PREEMPT(full)\\n[  117.319780][ T9855] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\\n[  117.319783][ T9855] Call Trace:\\n[  117.319785][ T9855]  \u003cTASK\u003e\\n[  117.319788][ T9855]  dump_stack_lvl+0x1c1/0x2a0\\n[  117.319795][ T9855]  ? __virt_addr_valid+0x1c8/0x5c0\\n[  117.319803][ T9855]  ? __pfx_dump_stack_lvl+0x10/0x10\\n[  117.319808][ T9855]  ? rcu_is_watching+0x15/0xb0\\n[  117.319816][ T9855]  ? lock_release+0x4b/0x3e0\\n[  117.319821][ T9855]  ? __kasan_check_byte+0x12/0x40\\n[  117.319828][ T9855]  ? __virt_addr_valid+0x1c8/0x5c0\\n[  117.319835][ T9855]  ? __virt_addr_valid+0x4a5/0x5c0\\n[  117.319842][ T9855]  print_report+0x17e/0x7e0\\n[  117.319848][ T9855]  ? __virt_addr_valid+0x1c8/0x5c0\\n[  117.319855][ T9855]  ? __virt_addr_valid+0x4a5/0x5c0\\n[  117.319862][ T9855]  ? __phys_addr+0xd3/0x180\\n[  117.319869][ T9855]  ? hfsplus_strcasecmp+0x1bc/0x490\\n[  117.319876][ T9855]  kasan_report+0x147/0x180\\n[  117.319882][ T9855]  ? hfsplus_strcasecmp+0x1bc/0x490\\n[  117.319891][ T9855]  hfsplus_strcasecmp+0x1bc/0x490\\n[  117.319900][ T9855]  ? __pfx_hfsplus_cat_case_cmp_key+0x10/0x10\\n[  117.319906][ T9855]  hfs_find_rec_by_key+0xa9/0x1e0\\n[  117.319913][ T9855]  __hfsplus_brec_find+0x18e/0x470\\n[  117.319920][ T9855]  ? __pfx_hfsplus_bnode_find+0x10/0x10\\n[  117.319926][ T9855]  ? __pfx_hfs_find_rec_by_key+0x10/0x10\\n[  117.319933][ T9855]  ? __pfx___hfsplus_brec_find+0x10/0x10\\n[  117.319942][ T9855]  hfsplus_brec_find+0x28f/0x510\\n[  117.319949][ T9855]  ? __pfx_hfs_find_rec_by_key+0x10/0x10\\n[  117.319956][ T9855]  ? __pfx_hfsplus_brec_find+0x10/0x10\\n[  117.319963][ T9855]  ? __kmalloc_noprof+0x2a9/0x510\\n[  117.319969][ T9855]  ? hfsplus_find_init+0x8c/0x1d0\\n[  117.319976][ T9855]  hfsplus_brec_read+0x2b/0x120\\n[  117.319983][ T9855]  hfsplus_lookup+0x2aa/0x890\\n[  117.319990][ T9855]  ? __pfx_hfsplus_lookup+0x10/0x10\\n[  117.320003][ T9855]  ? d_alloc_parallel+0x2f0/0x15e0\\n[  117.320008][ T9855]  ? __lock_acquire+0xaec/0xd80\\n[  117.320013][ T9855]  ? __pfx_d_alloc_parallel+0x10/0x10\\n[  117.320019][ T9855]  ? __raw_spin_lock_init+0x45/0x100\\n[  117.320026][ T9855]  ? __init_waitqueue_head+0xa9/0x150\\n[  117.320034][ T9855]  __lookup_slow+0x297/0x3d0\\n[  117.320039][ T9855]  ? __pfx___lookup_slow+0x10/0x10\\n[  117.320045][ T9855]  ? down_read+0x1ad/0x2e0\\n[  117.320055][ T9855]  lookup_slow+0x53/0x70\\n[  117.320065][ T9855]  walk_component+0x2f0/0x430\\n[  117.320073][ T9855]  path_lookupat+0x169/0x440\\n[  117.320081][ T9855]  filename_lookup+0x212/0x590\\n[  117.320089][ T9855]  ? __pfx_filename_lookup+0x10/0x10\\n[  117.320098][ T9855]  ? strncpy_from_user+0x150/0x290\\n[  117.320105][ T9855]  ? getname_flags+0x1e5/0x540\\n[  117.320112][ T9855]  user_path_at+0x3a/0x60\\n[  117.320117][ T9855]  __x64_sys_umount+0xee/0x160\\n[  117.320123][ T9855]  ? __pfx___x64_sys_umount+0x10/0x10\\n[  117.320129][ T9855]  ? do_syscall_64+0xb7/0x3a0\\n[  117.320135][ T9855]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n[  117.320141][ T9855]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n[  117.320145][ T9855]  do_syscall_64+0xf3/0x3a0\\n[  117.320150][ T9855]  ? exc_page_fault+0x9f/0xf0\\n[  117.320154][ T9855]  entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n[  117.320158][ T9855] RIP: 0033:0x7f7dd7908b07\\n[  117.320163][ T9855] Code: 23 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 08\\n[  117.320167][ T9855] RSP: 002b:00007ffd5ebd9698 EFLAGS: 00000202 \\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/hfsplus/unicode.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"603158d4efa98a13a746bd586c20f194f4a31ec8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"ef250c3edd995d7bb5a5e5122ffad1c28a8686eb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"7ab44236b32ed41eb0636797e8e8e885a2f3b18a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"b47a75b6f762321f9eb6f31aab7bce47a37063b7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"4f5ab4a9c6abd8b0d713cc2b7b041bc10d70f241\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"586c75dfd1d265c4150f6529debb85c9d62e101f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"4bc081ba6c52b0c88c92701e3fbc33c7e2277afb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\"lessThan\":\"42520df65bf67189541a425f7d36b0b3e7bd7844\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/hfsplus/unicode.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.301\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.246\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.196\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.158\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.114\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.55\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17.5\",\"lessThanOrEqual\":\"6.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/42520df65bf67189541a425f7d36b0b3e7bd7844\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4bc081ba6c52b0c88c92701e3fbc33c7e2277afb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4f5ab4a9c6abd8b0d713cc2b7b041bc10d70f241\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/586c75dfd1d265c4150f6529debb85c9d62e101f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/603158d4efa98a13a746bd586c20f194f4a31ec8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7ab44236b32ed41eb0636797e8e8e885a2f3b18a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b47a75b6f762321f9eb6f31aab7bce47a37063b7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ef250c3edd995d7bb5a5e5122ffad1c28a8686eb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-30T10:08:28+00:00",
      "cve": "CVE-2025-40088",
      "id": "CVE-2025-40088",
      "initial_release_date": "2025-10-30T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "260",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: hfsplus: fix slab-out-of-bounds read in hfsplus_strcasecmp()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40088.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-25T00:35:37Z",
      "cve": "CVE-2025-40088",
      "id": "CVE-2025-40088",
      "initial_release_date": "2025-10-31T00:25:19Z",
      "product_status:known_affected": "549",
      "product_status:known_not_affected": "6",
      "product_status:recommended": "498",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-40088",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-40088.json",
      "version": "33"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.