{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2024-26773", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.176Z", "datePublished": "2024-04-03T17:00:59.757Z", "dateUpdated": "2024-08-02T00:14:13.512Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:22:28.665Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()\n\nDetermine if the group block bitmap is corrupted before using ac_b_ex in\next4_mb_try_best_found() to avoid allocating blocks from a group with a\ncorrupted block bitmap in the following concurrency and making the\nsituation worse.\n\next4_mb_regular_allocator\n ext4_lock_group(sb, group)\n ext4_mb_good_group\n // check if the group bbitmap is corrupted\n ext4_mb_complex_scan_group\n // Scan group gets ac_b_ex but doesn't use it\n ext4_unlock_group(sb, group)\n ext4_mark_group_bitmap_corrupted(group)\n // The block bitmap was corrupted during\n // the group unlock gap.\n ext4_mb_try_best_found\n ext4_lock_group(ac->ac_sb, group)\n ext4_mb_use_best_found\n mb_mark_used\n // Allocating blocks in block bitmap corrupted group"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/mballoc.c"], "versions": [{"version": "1da177e4c3f4", "lessThan": "21f8cfe79f77", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "260fc96283c0", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "927794a02169", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f4", "lessThan": "4c21fa60a6f4", "status": "affected", 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{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()\n\nDetermine if the group block bitmap is corrupted before using ac_b_ex in\next4_mb_try_best_found() to avoid allocating blocks from a group with a\ncorrupted block bitmap in the following concurrency and making the\nsituation worse.\n\next4_mb_regular_allocator\n ext4_lock_group(sb, group)\n ext4_mb_good_group\n // check if the group bbitmap is corrupted\n ext4_mb_complex_scan_group\n // Scan group gets ac_b_ex but doesn't use it\n ext4_unlock_group(sb, group)\n ext4_mark_group_bitmap_corrupted(group)\n // The block bitmap was corrupted during\n // the group unlock gap.\n ext4_mb_try_best_found\n ext4_lock_group(ac->ac_sb, group)\n ext4_mb_use_best_found\n mb_mark_used\n // Allocating blocks in block bitmap corrupted group"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ext4: evite asignar bloques de un grupo da\u00f1ado en ext4_mb_try_best_found() Determine si el mapa de bits del bloque del grupo est\u00e1 da\u00f1ado antes de usar ac_b_ex en ext4_mb_try_best_found() para evitar asignar bloques de un grupo con un bloque da\u00f1ado mapa de bits en la siguiente concurrencia y empeorando la situaci\u00f3n. ext4_mb_regular_allocator ext4_lock_group(sb, group) ext4_mb_good_group // verifica si el bbitmap del grupo est\u00e1 da\u00f1ado ext4_mb_complex_scan_group // El grupo de escaneo obtiene ac_b_ex pero no lo usa ext4_unlock_group(sb, group) ext4_mark_group_bitmap_corrupted(group) // El mapa de bits del bloque se corrompi\u00f3 durante // el grupo desbloquea la brecha. ext4_mb_try_best_found ext4_lock_group(ac->ac_sb, group) ext4_mb_use_best_found mb_mark_used // Asignaci\u00f3n de bloques en un grupo da\u00f1ado de mapa de bits de bloques"}], "id": "CVE-2024-26773", "lastModified": "2024-06-27T13:15:56.330", "metrics": {}, "published": "2024-04-03T17:15:53.080", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0184747b552d6b5a14db3b7fcc3b792ce64dedd1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/21f8cfe79f776287459343e9cfa6055af61328ea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/260fc96283c0f594de18a1b045faf6d8fb42874d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4530b3660d396a646aad91a787b6ab37cf604b53"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4c21fa60a6f4606f6214a38f50612b17b2f738f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/927794a02169778c9c2e7b25c768ab3ea8c1dc03"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a2576ae9a35c078e488f2c573e9e6821d651fbbe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f97e75fa4e12b0aa0224e83fcbda8853ac2adf36"}, {"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-2024:4928", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.28.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-07-31T00:00:00Z"}, {"advisory": "RHSA-2024:4928", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.28.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-07-31T00:00:00Z"}, {"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: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()", "id": "2273236", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2273236"}, "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-229", "details": ["In the Linux kernel, the following vulnerability has been resolved:\next4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found()\nDetermine if the group block bitmap is corrupted before using ac_b_ex in\next4_mb_try_best_found() to avoid allocating blocks from a group with a\ncorrupted block bitmap in the following concurrency and making the\nsituation worse.\next4_mb_regular_allocator\next4_lock_group(sb, group)\next4_mb_good_group\n// check if the group bbitmap is corrupted\next4_mb_complex_scan_group\n// Scan group gets ac_b_ex but doesn't use it\next4_unlock_group(sb, group)\next4_mark_group_bitmap_corrupted(group)\n// The block bitmap was corrupted during\n// the group unlock gap.\next4_mb_try_best_found\next4_lock_group(ac->ac_sb, group)\next4_mb_use_best_found\nmb_mark_used\n// Allocating blocks in block bitmap corrupted group", "A vulnerability was found in the ext4_mb_try_best_found() function in the Linux kernel. This issue could lead to memory corruption or crashes due to the allocation of blocks from a group with a corrupted block bitmap."], "name": "CVE-2024-26773", "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-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-04-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26773\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26773\nhttps://lore.kernel.org/linux-cve-announce/2024040308-CVE-2024-26773-a314@gregkh/T"], "threat_severity": "Moderate", "upstream_fix": "kernel 4.19.308, kernel 5.4.270, kernel 5.10.211, kernel 5.15.150, kernel 6.1.80, kernel 6.6.19, kernel 6.7.7, kernel 6.8"}