{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49707", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:21:30.444Z", "datePublished": "2025-02-26T02:24:25.441Z", "dateUpdated": "2025-02-26T02:24:25.441Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-02-26T02:24:25.441Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: add reserved GDT blocks check\n\nWe capture a NULL pointer issue when resizing a corrupt ext4 image which\nis freshly clear resize_inode feature (not run e2fsck). It could be\nsimply reproduced by following steps. The problem is because of the\nresize_inode feature was cleared, and it will convert the filesystem to\nmeta_bg mode in ext4_resize_fs(), but the es->s_reserved_gdt_blocks was\nnot reduced to zero, so could we mistakenly call reserve_backup_gdb()\nand passing an uninitialized resize_inode to it when adding new group\ndescriptors.\n\n mkfs.ext4 /dev/sda 3G\n tune2fs -O ^resize_inode /dev/sda #forget to run requested e2fsck\n mount /dev/sda /mnt\n resize2fs /dev/sda 8G\n\n ========\n BUG: kernel NULL pointer dereference, address: 0000000000000028\n CPU: 19 PID: 3243 Comm: resize2fs Not tainted 5.18.0-rc7-00001-gfde086c5ebfd #748\n ...\n RIP: 0010:ext4_flex_group_add+0xe08/0x2570\n ...\n Call Trace:\n <TASK>\n ext4_resize_fs+0xbec/0x1660\n __ext4_ioctl+0x1749/0x24e0\n ext4_ioctl+0x12/0x20\n __x64_sys_ioctl+0xa6/0x110\n do_syscall_64+0x3b/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7f2dd739617b\n ========\n\nThe fix is simple, add a check in ext4_resize_begin() to make sure that\nthe es->s_reserved_gdt_blocks is zero when the resize_inode feature is\ndisabled."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/resize.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0dc2fca8e4f9ac4a40e8424a10163369cca0cc06", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7c921328ac760bba780bdace41f4cd045f7f1405", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b9747263b13e5290ac4d63bec47e38f701303cad", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "fba54289176702a7caac0b64738406775817f451", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "bfd004a1d3a062aac300523d406ac1f3e5f1a82c", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "33b1bba31f4c784d33d2c2517964bdccdc9204cd", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "af75c481a2e45e70f62f5942c93695e95bf7bd21", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b55c3cd102a6f48b90e61c44f7f3dda8c290c694", "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/resize.c"], "versions": [{"version": "4.9.320", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.285", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.249", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.200", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.124", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.49", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.6", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/0dc2fca8e4f9ac4a40e8424a10163369cca0cc06"}, {"url": "https://git.kernel.org/stable/c/7c921328ac760bba780bdace41f4cd045f7f1405"}, {"url": "https://git.kernel.org/stable/c/b9747263b13e5290ac4d63bec47e38f701303cad"}, {"url": "https://git.kernel.org/stable/c/fba54289176702a7caac0b64738406775817f451"}, {"url": "https://git.kernel.org/stable/c/bfd004a1d3a062aac300523d406ac1f3e5f1a82c"}, {"url": "https://git.kernel.org/stable/c/33b1bba31f4c784d33d2c2517964bdccdc9204cd"}, {"url": "https://git.kernel.org/stable/c/af75c481a2e45e70f62f5942c93695e95bf7bd21"}, {"url": "https://git.kernel.org/stable/c/b55c3cd102a6f48b90e61c44f7f3dda8c290c694"}], "title": "ext4: add reserved GDT blocks check", "x_generator": {"engine": "bippy-5f407fcff5a0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CF939175-79DE-4866-B38C-4C8F9896B785", "versionEndExcluding": "4.9.320", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6D4E7BA7-6B66-4B9A-991A-AD516DADF77D", "versionEndExcluding": "4.14.285", "versionStartIncluding": "4.10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8A08E48B-CA77-4A21-9558-17D61C146BE9", "versionEndExcluding": "4.19.249", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "80B2AE57-4A7E-40BB-8C83-33D4436CE199", "versionEndExcluding": "5.4.200", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6442F2CD-FF1C-4574-9948-138835E635D7", "versionEndExcluding": "5.10.124", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "697D250E-E0A4-41BE-BB54-96385E129206", "versionEndExcluding": "5.15.49", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CDD33A19-B51E-4090-A47B-073098916815", "versionEndExcluding": "5.18.6", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*", "matchCriteriaId": "A8C30C2D-F82D-4D37-AB48-D76ABFBD5377", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*", "matchCriteriaId": "BF8547FC-C849-4F1B-804B-A93AE2F04A92", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: add reserved GDT blocks check\n\nWe capture a NULL pointer issue when resizing a corrupt ext4 image which\nis freshly clear resize_inode feature (not run e2fsck). It could be\nsimply reproduced by following steps. The problem is because of the\nresize_inode feature was cleared, and it will convert the filesystem to\nmeta_bg mode in ext4_resize_fs(), but the es->s_reserved_gdt_blocks was\nnot reduced to zero, so could we mistakenly call reserve_backup_gdb()\nand passing an uninitialized resize_inode to it when adding new group\ndescriptors.\n\n mkfs.ext4 /dev/sda 3G\n tune2fs -O ^resize_inode /dev/sda #forget to run requested e2fsck\n mount /dev/sda /mnt\n resize2fs /dev/sda 8G\n\n ========\n BUG: kernel NULL pointer dereference, address: 0000000000000028\n CPU: 19 PID: 3243 Comm: resize2fs Not tainted 5.18.0-rc7-00001-gfde086c5ebfd #748\n ...\n RIP: 0010:ext4_flex_group_add+0xe08/0x2570\n ...\n Call Trace:\n <TASK>\n ext4_resize_fs+0xbec/0x1660\n __ext4_ioctl+0x1749/0x24e0\n ext4_ioctl+0x12/0x20\n __x64_sys_ioctl+0xa6/0x110\n do_syscall_64+0x3b/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7f2dd739617b\n ========\n\nThe fix is simple, add a check in ext4_resize_begin() to make sure that\nthe es->s_reserved_gdt_blocks is zero when the resize_inode feature is\ndisabled."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: agregar bloques GDT reservados comprobar Capturamos un problema de puntero NULL al cambiar el tama\u00f1o de una imagen ext4 corrupta que reci\u00e9n borra la caracter\u00edstica resize_inode (no ejecuta e2fsck). Podr\u00eda reproducirse simplemente siguiendo los pasos. El problema se debe a que se borr\u00f3 la caracter\u00edstica resize_inode y convertir\u00e1 el sistema de archivos al modo meta_bg en ext4_resize_fs(), pero es-&gt;s_reserved_gdt_blocks no se redujo a cero, por lo que podr\u00edamos llamar por error a reserve_backup_gdb() y pasarle un resize_inode no inicializado al agregar nuevos descriptores de grupo. mkfs.ext4 /dev/sda 3G tune2fs -O ^resize_inode /dev/sda #olvid\u00e9 ejecutar el montaje e2fsck solicitado /dev/sda /mnt resize2fs /dev/sda 8G ======== ERROR: desreferencia de puntero NULL del n\u00facleo, direcci\u00f3n: 0000000000000028 CPU: 19 PID: 3243 Comm: resize2fs No contaminado 5.18.0-rc7-00001-gfde086c5ebfd #748 ... RIP: 0010:ext4_flex_group_add+0xe08/0x2570 ... Seguimiento de llamadas: ext4_resize_fs+0xbec/0x1660 __ext4_ioctl+0x1749/0x24e0 ext4_ioctl+0x12/0x20 __x64_sys_ioctl+0xa6/0x110 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f2dd739617b ======== La soluci\u00f3n es simple, agregue una comprobaci\u00f3n en ext4_resize_begin() para asegurarse de que es-&gt;s_reserved_gdt_blocks sea cero cuando la funci\u00f3n resize_inode est\u00e9 deshabilitada."}], "id": "CVE-2022-49707", "lastModified": "2025-03-11T22:28:37.880", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-02-26T07:01:46.500", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0dc2fca8e4f9ac4a40e8424a10163369cca0cc06"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/33b1bba31f4c784d33d2c2517964bdccdc9204cd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7c921328ac760bba780bdace41f4cd045f7f1405"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/af75c481a2e45e70f62f5942c93695e95bf7bd21"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b55c3cd102a6f48b90e61c44f7f3dda8c290c694"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b9747263b13e5290ac4d63bec47e38f701303cad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bfd004a1d3a062aac300523d406ac1f3e5f1a82c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fba54289176702a7caac0b64738406775817f451"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ext4: add reserved GDT blocks check", "id": "2348100", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348100"}, "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: add reserved GDT blocks check\nWe capture a NULL pointer issue when resizing a corrupt ext4 image which\nis freshly clear resize_inode feature (not run e2fsck). It could be\nsimply reproduced by following steps. The problem is because of the\nresize_inode feature was cleared, and it will convert the filesystem to\nmeta_bg mode in ext4_resize_fs(), but the es->s_reserved_gdt_blocks was\nnot reduced to zero, so could we mistakenly call reserve_backup_gdb()\nand passing an uninitialized resize_inode to it when adding new group\ndescriptors.\nmkfs.ext4 /dev/sda 3G\ntune2fs -O ^resize_inode /dev/sda #forget to run requested e2fsck\nmount /dev/sda /mnt\nresize2fs /dev/sda 8G\n========\nBUG: kernel NULL pointer dereference, address: 0000000000000028\nCPU: 19 PID: 3243 Comm: resize2fs Not tainted 5.18.0-rc7-00001-gfde086c5ebfd #748\n...\nRIP: 0010:ext4_flex_group_add+0xe08/0x2570\n...\nCall Trace:\n<TASK>\next4_resize_fs+0xbec/0x1660\n__ext4_ioctl+0x1749/0x24e0\next4_ioctl+0x12/0x20\n__x64_sys_ioctl+0xa6/0x110\ndo_syscall_64+0x3b/0x90\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nRIP: 0033:0x7f2dd739617b\n========\nThe fix is simple, add a check in ext4_resize_begin() to make sure that\nthe es->s_reserved_gdt_blocks is zero when the resize_inode feature is\ndisabled."], "name": "CVE-2022-49707", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "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": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49707\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49707\nhttps://lore.kernel.org/linux-cve-announce/2025022630-CVE-2022-49707-c4b7@gregkh/T"], "threat_severity": "Moderate"}