CVE-2026-43245 (GCVE-0-2026-43245)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-06 11:28
VLAI?
Title
ntfs: ->d_compare() must not block
Summary
In the Linux kernel, the following vulnerability has been resolved: ntfs: ->d_compare() must not block ... so don't use __getname() there. Switch it (and ntfs_d_hash(), while we are at it) to kmalloc(PATH_MAX, GFP_NOWAIT). Yes, ntfs_d_hash() almost certainly can do with smaller allocations, but let ntfs folks deal with that - keep the allocation size as-is for now. Stop abusing names_cachep in ntfs, period - various uses of that thing in there have nothing to do with pathnames; just use k[mz]alloc() and be done with that. For now let's keep sizes as-in, but AFAICS none of the users actually want PATH_MAX.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 142c444a395f4d26055c8a4473e228bb86283f1e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fb4b1f969ba01fa1d4088467a02fc1e5f0806710 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ca2a04e84af79596e5cd9cfe697d5122ec39c8ce (git)
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    Linux Linux Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "fs/ntfs3/dir.c",
            "fs/ntfs3/fsntfs.c",
            "fs/ntfs3/inode.c",
            "fs/ntfs3/namei.c",
            "fs/ntfs3/xattr.c"
          ],
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              "versionType": "git"
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              "versionType": "git"
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            "fs/ntfs3/inode.c",
            "fs/ntfs3/namei.c",
            "fs/ntfs3/xattr.c"
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              "versionType": "semver"
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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\nntfs: -\u003ed_compare() must not block\n\n... so don\u0027t use __getname() there.  Switch it (and ntfs_d_hash(), while\nwe are at it) to kmalloc(PATH_MAX, GFP_NOWAIT).  Yes, ntfs_d_hash()\nalmost certainly can do with smaller allocations, but let ntfs folks\ndeal with that - keep the allocation size as-is for now.\n\nStop abusing names_cachep in ntfs, period - various uses of that thing\nin there have nothing to do with pathnames; just use k[mz]alloc() and\nbe done with that.  For now let\u0027s keep sizes as-in, but AFAICS none of\nthe users actually want PATH_MAX."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T11:28:37.602Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/142c444a395f4d26055c8a4473e228bb86283f1e"
        },
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          "url": "https://git.kernel.org/stable/c/fb4b1f969ba01fa1d4088467a02fc1e5f0806710"
        },
        {
          "url": "https://git.kernel.org/stable/c/ca2a04e84af79596e5cd9cfe697d5122ec39c8ce"
        }
      ],
      "title": "ntfs: -\u003ed_compare() must not block",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43245",
    "datePublished": "2026-05-06T11:28:37.602Z",
    "dateReserved": "2026-05-01T14:12:55.996Z",
    "dateUpdated": "2026-05-06T11:28:37.602Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43245\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-06T12:16:44.997\",\"lastModified\":\"2026-05-06T13:07:51.607\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nntfs: -\u003ed_compare() must not block\\n\\n... so don\u0027t use __getname() there.  Switch it (and ntfs_d_hash(), while\\nwe are at it) to kmalloc(PATH_MAX, GFP_NOWAIT).  Yes, ntfs_d_hash()\\nalmost certainly can do with smaller allocations, but let ntfs folks\\ndeal with that - keep the allocation size as-is for now.\\n\\nStop abusing names_cachep in ntfs, period - various uses of that thing\\nin there have nothing to do with pathnames; just use k[mz]alloc() and\\nbe done with that.  For now let\u0027s keep sizes as-in, but AFAICS none of\\nthe users actually want PATH_MAX.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/142c444a395f4d26055c8a4473e228bb86283f1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ca2a04e84af79596e5cd9cfe697d5122ec39c8ce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fb4b1f969ba01fa1d4088467a02fc1e5f0806710\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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