{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-49889", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T12:17:06.022Z", "datePublished": "2024-10-21T18:01:24.941Z", "dateUpdated": "2024-11-05T09:50:48.910Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-05T09:50:48.910Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/extents.c"], "versions": [{"version": "1da177e4c3f4", "lessThan": "b0cb4561fc42", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "4999fed877bb", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "2eba3b0cc5b8", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "34b2096380ba", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "8b114f2cc7dd", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "d483c7cc1796", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "4e2524ba2ca5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/extents.c"], "versions": [{"version": "5.10.227", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.168", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.113", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.55", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10.14", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.3", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "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-9e1c9544281a"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-49889", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-10-22T13:44:36.395156Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:48:49.316Z"}}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "EB525A44-6338-4857-AD90-EA2860D1AD1F", "versionEndExcluding": "5.10.227", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4D51C05D-455B-4D8D-89E7-A58E140B864C", "versionEndExcluding": "5.15.168", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D01BD22E-ACD1-4618-9D01-6116570BE1EE", "versionEndExcluding": "6.1.113", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E90B9576-56C4-47BC-AAB0-C5B2D438F5D0", "versionEndExcluding": "6.6.55", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4C16BCE0-FFA0-4599-BE0A-1FD65101C021", "versionEndExcluding": "6.10.14", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "54D9C704-D679-41A7-9C40-10A6B1E7FFE9", "versionEndExcluding": "6.11.3", "versionStartIncluding": "6.11", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: evitar use after free en ext4_ext_show_leaf() En ext4_find_extent(), path puede liberarse por error o reasignarse, por lo que el uso de un *ppath previamente guardado puede haberse liberado y, por lo tanto, puede activar el use after free, de la siguiente manera: ext4_split_extent path = *ppath; ext4_split_extent_at(ppath) path = ext4_find_extent(ppath) ext4_split_extent_at(ppath) // ext4_find_extent no puede liberar path // pero la puesta a cero tiene \u00e9xito ext4_ext_show_leaf(inode, path) eh = path[depth].p_hdr // use after free de path !!! De manera similar a ext4_split_extent_at(), usamos *ppath directamente como entrada para ext4_ext_show_leaf(). Por cierto, corrige un error ortogr\u00e1fico. El mismo problema en ext4_ext_handle_unwritten_extents(). Dado que 'path' solo se usa en ext4_ext_show_leaf(), elimine 'path' y use *ppath directamente. Este problema se activa solo cuando se define EXT_DEBUG y, por lo tanto, no afecta la funcionalidad."}], "id": "CVE-2024-49889", "lastModified": "2024-10-25T14:37:34.400", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-10-21T18:15:11.513", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2eba3b0cc5b8de624918d21f32b5b8db59a90b39"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/34b2096380ba475771971a778a478661a791aa15"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4999fed877bb64e3e7f9ab9996de2ca983c41928"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4e2524ba2ca5f54bdbb9e5153bea00421ef653f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8b114f2cc7dd5d36729d040b68432fbd0f0a8868"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b0cb4561fc4284d04e69c8a66c8504928ab2484e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d483c7cc1796bd6a80e7b3a8fd494996260f6b67"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ext4: avoid use-after-free in ext4_ext_show_leaf()", "id": "2320520", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320520"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\next4: avoid use-after-free in ext4_ext_show_leaf()\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:\next4_split_extent\npath = *ppath;\next4_split_extent_at(ppath)\npath = ext4_find_extent(ppath)\next4_split_extent_at(ppath)\n// ext4_find_extent fails to free path\n// but zeroout succeeds\next4_ext_show_leaf(inode, path)\neh = path[depth].p_hdr\n// path use-after-free !!!\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.\nSame problem in ext4_ext_handle_unwritten_extents(). Since 'path' is only\nused in ext4_ext_show_leaf(), remove 'path' and use *ppath directly.\nThis issue is triggered only when EXT_DEBUG is defined and therefore does\nnot affect functionality."], "name": "CVE-2024-49889", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-49889\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-49889\nhttps://lore.kernel.org/linux-cve-announce/2024102117-CVE-2024-49889-6140@gregkh/T"], "threat_severity": "Moderate"}