{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2024-26704", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.158Z", "datePublished": "2024-04-03T14:55:02.672Z", "dateUpdated": "2024-09-11T17:33:27.505Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:21:10.394Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix double-free of blocks due to wrong extents moved_len\n\nIn ext4_move_extents(), moved_len is only updated when all moves are\nsuccessfully executed, and only discards orig_inode and donor_inode\npreallocations when moved_len is not zero. When the loop fails to exit\nafter successfully moving some extents, moved_len is not updated and\nremains at 0, so it does not discard the preallocations.\n\nIf the moved extents overlap with the preallocated extents, the\noverlapped extents are freed twice in ext4_mb_release_inode_pa() and\next4_process_freed_data() (as described in commit 94d7c16cbbbd (\"ext4:\nFix double-free of blocks with EXT4_IOC_MOVE_EXT\")), and bb_free is\nincremented twice. Hence when trim is executed, a zero-division bug is\ntriggered in mb_update_avg_fragment_size() because bb_free is not zero\nand bb_fragments is zero.\n\nTherefore, update move_len after each extent move to avoid the issue."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/move_extent.c"], "versions": [{"version": "fcf6b1b729bc", "lessThan": "b4fbb89d722c", "status": "affected", "versionType": "git"}, {"version": "fcf6b1b729bc", "lessThan": "afbcad9ae7d6", "status": "affected", "versionType": "git"}, {"version": "fcf6b1b729bc", "lessThan": "d033a555d9a1", "status": "affected", "versionType": "git"}, {"version": "fcf6b1b729bc", "lessThan": "afba9d11320d", "status": "affected", "versionType": "git"}, {"version": "fcf6b1b729bc", "lessThan": "185eab30486b", "status": "affected", "versionType": "git"}, {"version": "fcf6b1b729bc", "lessThan": 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{"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": ["x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:14:12.613Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-26704", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:52:39.832740Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:16.773Z"}}], "cna": {"title": "ext4: fix double-free of blocks due to wrong extents moved_len", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "fcf6b1b729bc", "lessThan": "b4fbb89d722c", "versionType": "git"}, {"status": "affected", "version": "fcf6b1b729bc", "lessThan": "afbcad9ae7d6", "versionType": "git"}, {"status": "affected", "version": "fcf6b1b729bc", "lessThan": "d033a555d9a1", "versionType": "git"}, {"status": "affected", "version": "fcf6b1b729bc", "lessThan": "afba9d11320d", "versionType": "git"}, {"status": "affected", "version": "fcf6b1b729bc", "lessThan": "185eab30486b", "versionType": "git"}, {"status": "affected", "version": "fcf6b1b729bc", "lessThan": "2883940b19c3", "versionType": "git"}, {"status": "affected", "version": "fcf6b1b729bc", "lessThan": "559ddacb90da", "versionType": "git"}, {"status": "affected", "version": "fcf6b1b729bc", "lessThan": "55583e899a53", "versionType": "git"}], "programFiles": ["fs/ext4/move_extent.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": 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[{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix double-free of blocks due to wrong extents moved_len\n\nIn ext4_move_extents(), moved_len is only updated when all moves are\nsuccessfully executed, and only discards orig_inode and donor_inode\npreallocations when moved_len is not zero. When the loop fails to exit\nafter successfully moving some extents, moved_len is not updated and\nremains at 0, so it does not discard the preallocations.\n\nIf the moved extents overlap with the preallocated extents, the\noverlapped extents are freed twice in ext4_mb_release_inode_pa() and\next4_process_freed_data() (as described in commit 94d7c16cbbbd (\"ext4:\nFix double-free of blocks with EXT4_IOC_MOVE_EXT\")), and bb_free is\nincremented twice. Hence when trim is executed, a zero-division bug is\ntriggered in mb_update_avg_fragment_size() because bb_free is not zero\nand bb_fragments is zero.\n\nTherefore, update move_len after each extent move to avoid the issue."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:21:10.394Z"}}}, "cveMetadata": {"cveId": "CVE-2024-26704", "state": "PUBLISHED", "dateUpdated": "2024-09-11T17:33:27.505Z", "dateReserved": "2024-02-19T14:20:24.158Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-04-03T14:55:02.672Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix double-free of blocks due to wrong extents moved_len\n\nIn ext4_move_extents(), moved_len is only updated when all moves are\nsuccessfully executed, and only discards orig_inode and donor_inode\npreallocations when moved_len is not zero. When the loop fails to exit\nafter successfully moving some extents, moved_len is not updated and\nremains at 0, so it does not discard the preallocations.\n\nIf the moved extents overlap with the preallocated extents, the\noverlapped extents are freed twice in ext4_mb_release_inode_pa() and\next4_process_freed_data() (as described in commit 94d7c16cbbbd (\"ext4:\nFix double-free of blocks with EXT4_IOC_MOVE_EXT\")), and bb_free is\nincremented twice. Hence when trim is executed, a zero-division bug is\ntriggered in mb_update_avg_fragment_size() because bb_free is not zero\nand bb_fragments is zero.\n\nTherefore, update move_len after each extent move to avoid the issue."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: corrige la doble liberaci\u00f3n de bloques debido a extensiones incorrectas. moving_len En ext4_move_extents(), move_len solo se actualiza cuando todos los movimientos se ejecutan exitosamente y solo descarta las preasignaciones de orig_inode y donante_inode cuando se mueve_len no es cero. Cuando el bucle no sale despu\u00e9s de mover con \u00e9xito algunas extensiones, moving_len no se actualiza y permanece en 0, por lo que no descarta las asignaciones previas. Si las extensiones movidas se superponen con las extensiones preasignadas, las extensiones superpuestas se liberan dos veces en ext4_mb_release_inode_pa() y ext4_process_freed_data() (como se describe en el commit 94d7c16cbbbd (\"ext4: corrige la doble liberaci\u00f3n de bloques con EXT4_IOC_MOVE_EXT\")), y se incrementa bb_free dos veces. Por lo tanto, cuando se ejecuta trim, se activa un error de divisi\u00f3n cero en mb_update_avg_fragment_size() porque bb_free no es cero y bb_fragments es cero. Por lo tanto, actualice move_len despu\u00e9s de cada movimiento de extensi\u00f3n para evitar el problema."}], "id": "CVE-2024-26704", "lastModified": "2024-06-27T12:15:20.167", "metrics": {}, "published": "2024-04-03T15:15:53.193", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/185eab30486ba3e7bf8b9c2e049c79a06ffd2bc1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2883940b19c38d5884c8626483811acf4d7e148f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/55583e899a5357308274601364741a83e78d6ac4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/559ddacb90da1d8786dd8ec4fd76bbfa404eaef6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/afba9d11320dad5ce222ac8964caf64b7b4bedb1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/afbcad9ae7d6d11608399188f03a837451b6b3a1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b4fbb89d722cbb16beaaea234b7230faaaf68c71"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d033a555d9a1cf53dbf3301af7199cc4a4c8f537"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"affected_release": [{"advisory": "RHSA-2024:5102", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.16.1.rt7.357.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:5101", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.16.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:6753", "cpe": "cpe:/o:redhat:rhel_aus:8.6", "package": "kernel-0:4.18.0-372.123.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support", "release_date": "2024-09-18T00:00:00Z"}, {"advisory": "RHSA-2024:6753", "cpe": "cpe:/o:redhat:rhel_tus:8.6", "package": "kernel-0:4.18.0-372.123.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Telecommunications Update Service", "release_date": "2024-09-18T00:00:00Z"}, {"advisory": "RHSA-2024:6753", "cpe": "cpe:/o:redhat:rhel_e4s:8.6", "package": "kernel-0:4.18.0-372.123.1.el8_6", "product_name": "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions", "release_date": "2024-09-18T00:00:00Z"}, {"advisory": "RHSA-2024:5255", "cpe": "cpe:/o:redhat:rhel_eus:8.8", "package": "kernel-0:4.18.0-477.67.1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "release_date": "2024-08-13T00:00:00Z"}, {"advisory": "RHSA-2024:4823", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.75.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-07-24T00:00:00Z"}, {"advisory": "RHSA-2024:4831", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.75.1.rt14.360.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-07-24T00:00:00Z"}], "bugzilla": {"description": "kernel: ext4: fix double-free of blocks due to wrong extents moved_len", "id": "2273174", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2273174"}, "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": "verified"}, "cwe": "CWE-415", "details": ["In the Linux kernel, the following vulnerability has been resolved:\next4: fix double-free of blocks due to wrong extents moved_len\nIn ext4_move_extents(), moved_len is only updated when all moves are\nsuccessfully executed, and only discards orig_inode and donor_inode\npreallocations when moved_len is not zero. When the loop fails to exit\nafter successfully moving some extents, moved_len is not updated and\nremains at 0, so it does not discard the preallocations.\nIf the moved extents overlap with the preallocated extents, the\noverlapped extents are freed twice in ext4_mb_release_inode_pa() and\next4_process_freed_data() (as described in commit 94d7c16cbbbd (\"ext4:\nFix double-free of blocks with EXT4_IOC_MOVE_EXT\")), and bb_free is\nincremented twice. Hence when trim is executed, a zero-division bug is\ntriggered in mb_update_avg_fragment_size() because bb_free is not zero\nand bb_fragments is zero.\nTherefore, update move_len after each extent move to avoid the issue.", "A vulnerability was found in the Linux kernel. This issue occurs in the ext4 function, in ext4_move_extents(), where an error in updating the moved_len variable can lead to double-free of blocks and corrupt block accounting. This could lead to crashes or undefined behavior."], "name": "CVE-2024-26704", "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:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-04-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26704\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26704\nhttps://lore.kernel.org/linux-cve-announce/2024040340-CVE-2024-26704-a082@gregkh/T"], "statement": "This vulnerability is rated as moderate because this issue could lead to ext4 file system crashes or undefined behavior on the system.", "threat_severity": "Moderate", "upstream_fix": "kernel 4.19.307, kernel 5.4.269, kernel 5.10.210, kernel 5.15.149, kernel 6.1.79, kernel 6.6.18, kernel 6.7.6, kernel 6.8"}