CVE-2024-44947 (GCVE-0-2024-44947)
Vulnerability from cvelistv5
Published
2024-09-02 17:36
Modified
2025-11-03 22:13
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: fuse: Initialize beyond-EOF page contents before setting uptodate fuse_notify_store(), unlike fuse_do_readpage(), does not enable page zeroing (because it can be used to change partial page contents). So fuse_notify_store() must be more careful to fully initialize page contents (including parts of the page that are beyond end-of-file) before marking the page uptodate. The current code can leave beyond-EOF page contents uninitialized, which makes these uninitialized page contents visible to userspace via mmap(). This is an information leak, but only affects systems which do not enable init-on-alloc (via CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y or the corresponding kernel command line parameter).
References
Impacted products
Vendor Product Version
Linux Linux Version: a1d75f258230b75d46aecdf28b2e732413028863
Version: a1d75f258230b75d46aecdf28b2e732413028863
Version: a1d75f258230b75d46aecdf28b2e732413028863
Version: a1d75f258230b75d46aecdf28b2e732413028863
Version: a1d75f258230b75d46aecdf28b2e732413028863
Version: a1d75f258230b75d46aecdf28b2e732413028863
Version: a1d75f258230b75d46aecdf28b2e732413028863
Version: a1d75f258230b75d46aecdf28b2e732413028863
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\"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a1d75f258230b75d46aecdf28b2e732413028863\", \"lessThan\": \"ac42e0f0eb66af966015ee33fd355bc6f5d80cd6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a1d75f258230b75d46aecdf28b2e732413028863\", \"lessThan\": \"18a067240817bee8a9360539af5d79a4bf5398a5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a1d75f258230b75d46aecdf28b2e732413028863\", \"lessThan\": \"3c0da3d163eb32f1f91891efaade027fa9b245b9\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/fuse/dev.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.36\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.36\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.321\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.283\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.225\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.166\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.107\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.48\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/fuse/dev.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/49934861514d36d0995be8e81bb3312a499d8d9a\"}, {\"url\": \"https://git.kernel.org/stable/c/33168db352c7b56ae18aa55c2cae1a1c5905d30e\"}, {\"url\": \"https://git.kernel.org/stable/c/4690e2171f651e2b415e3941ce17f2f7b813aff6\"}, {\"url\": \"https://git.kernel.org/stable/c/8c78303eafbf85a728dd84d1750e89240c677dd9\"}, {\"url\": \"https://git.kernel.org/stable/c/831433527773e665bdb635ab5783d0b95d1246f4\"}, {\"url\": \"https://git.kernel.org/stable/c/ac42e0f0eb66af966015ee33fd355bc6f5d80cd6\"}, {\"url\": \"https://git.kernel.org/stable/c/18a067240817bee8a9360539af5d79a4bf5398a5\"}, {\"url\": \"https://git.kernel.org/stable/c/3c0da3d163eb32f1f91891efaade027fa9b245b9\"}, {\"url\": \"https://project-zero.issues.chromium.org/issues/42451729\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfuse: Initialize beyond-EOF page contents before setting uptodate\\n\\nfuse_notify_store(), unlike fuse_do_readpage(), does not enable page\\nzeroing (because it can be used to change partial page contents).\\n\\nSo fuse_notify_store() must be more careful to fully initialize page\\ncontents (including parts of the page that are beyond end-of-file)\\nbefore marking the page uptodate.\\n\\nThe current code can leave beyond-EOF page contents uninitialized, which\\nmakes these uninitialized page contents visible to userspace via mmap().\\n\\nThis is an information leak, but only affects systems which do not\\nenable init-on-alloc (via CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y or the\\ncorresponding kernel command line parameter).\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.321\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.283\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.225\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.166\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.107\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.48\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.7\", \"versionStartIncluding\": \"2.6.36\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11\", \"versionStartIncluding\": \"2.6.36\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:29:35.643Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-44947\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T22:13:54.619Z\", \"dateReserved\": \"2024-08-21T05:34:56.665Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-09-02T17:36:15.633Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}