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Fix a spelling error by the way.\n\nSame problem in ext4_ext_handle_unwritten_extents(). Since 'path' is only\nused in ext4_ext_show_leaf(), remove 'path' and use *ppath directly.\n\nThis issue is triggered only when EXT_DEBUG is defined and therefore does\nnot affect functionality.","state":"PUBLISHED","assigner":"Linux","published_at":"2024-10-21 18:15:11","updated_at":"2026-05-12 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the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid use-after-free in ext4_ext_show_leaf()\n\nIn ext4_find_extent(), path may be freed by error or be reallocated, so\nusing a previously saved *ppath may have been freed and thus may trigger\nuse-after-free, as follows:\n\next4_split_extent\n  path = *ppath;\n  ext4_split_extent_at(ppath)\n  path = ext4_find_extent(ppath)\n  ext4_split_extent_at(ppath)\n    // ext4_find_extent fails to free path\n    // but zeroout succeeds\n  ext4_ext_show_leaf(inode, path)\n    eh = path[depth].p_hdr\n    // path use-after-free !!!\n\nSimilar to ext4_split_extent_at(), we use *ppath directly as an input to\next4_ext_show_leaf(). Fix a spelling error by the way.\n\nSame problem in ext4_ext_handle_unwritten_extents(). Since 'path' is only\nused in ext4_ext_show_leaf(), remove 'path' and use *ppath directly.\n\nThis issue is triggered only when EXT_DEBUG is defined and therefore does\nnot affect functionality."}],"providerMetadata":{"dateUpdated":"2026-05-11T20:41:13.349Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b0cb4561fc4284d04e69c8a66c8504928ab2484e"},{"url":"https://git.kernel.org/stable/c/4999fed877bb64e3e7f9ab9996de2ca983c41928"},{"url":"https://git.kernel.org/stable/c/2eba3b0cc5b8de624918d21f32b5b8db59a90b39"},{"url":"https://git.kernel.org/stable/c/34b2096380ba475771971a778a478661a791aa15"},{"url":"https://git.kernel.org/stable/c/8b114f2cc7dd5d36729d040b68432fbd0f0a8868"},{"url":"https://git.kernel.org/stable/c/d483c7cc1796bd6a80e7b3a8fd494996260f6b67"},{"url":"https://git.kernel.org/stable/c/4e2524ba2ca5f54bdbb9e5153bea00421ef653f5"}],"title":"ext4: avoid use-after-free in ext4_ext_show_leaf()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2024-49889","datePublished":"2024-10-21T18:01:24.941Z","dateReserved":"2024-10-21T12:17:06.022Z","dateUpdated":"2026-05-12T11:58:53.518Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2024-10-21 18:15:11","lastModifiedDate":"2026-05-12 12:17:16","problem_types":["CWE-416"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.227","matchCriteriaId":"EB525A44-6338-4857-AD90-EA2860D1AD1F"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.168","matchCriteriaId":"4D51C05D-455B-4D8D-89E7-A58E140B864C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.113","matchCriteriaId":"D01BD22E-ACD1-4618-9D01-6116570BE1EE"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.55","matchCriteriaId":"E90B9576-56C4-47BC-AAB0-C5B2D438F5D0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.10.14","matchCriteriaId":"4C16BCE0-FFA0-4599-BE0A-1FD65101C021"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.11.3","matchCriteriaId":"54D9C704-D679-41A7-9C40-10A6B1E7FFE9"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2024","CveId":"49889","Ordinal":"1","Title":"ext4: avoid use-after-free in ext4_ext_show_leaf()","CVE":"CVE-2024-49889","Year":"2024"},"notes":[{"CveYear":"2024","CveId":"49889","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid use-after-free in ext4_ext_show_leaf()\n\nIn ext4_find_extent(), path may be freed by error or be reallocated, so\nusing a previously saved *ppath may have been freed and thus may trigger\nuse-after-free, as follows:\n\next4_split_extent\n  path = *ppath;\n  ext4_split_extent_at(ppath)\n  path = ext4_find_extent(ppath)\n  ext4_split_extent_at(ppath)\n    // ext4_find_extent fails to free path\n    // but zeroout succeeds\n  ext4_ext_show_leaf(inode, path)\n    eh = path[depth].p_hdr\n    // path use-after-free !!!\n\nSimilar to ext4_split_extent_at(), we use *ppath directly as an input to\next4_ext_show_leaf(). Fix a spelling error by the way.\n\nSame problem in ext4_ext_handle_unwritten_extents(). Since 'path' is only\nused in ext4_ext_show_leaf(), remove 'path' and use *ppath directly.\n\nThis issue is triggered only when EXT_DEBUG is defined and therefore does\nnot affect functionality.","Type":"Description","Title":"ext4: avoid use-after-free in ext4_ext_show_leaf()"}]}}}