{"id":"CVE-2023-52622","revision":null,"records":[{"revision":"be067052ada54ca983e5ee61c38c22d0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-52622","aliases":[],"title":"ext4: avoid online resizing failures due to oversized flex bg","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid online resizing failures due to oversized flex bg\n\nWhen we online resize an ext4 filesystem with a oversized flexbg_size,\n\n mkfs.ext4 -F -G 67108864 $dev -b 4096 100M\n mount $dev $dir\n resize2fs $dev 16G\n\nthe following WARN_ON is triggered:\n==================================================================\nWARNING: CPU: 0 PID: 427 at mm/page_alloc.c:4402 __alloc_pages+0x411/0x550\nModules linked in: sg(E)\nCPU: 0 PID: 427 Comm: resize2fs Tainted: G E 6.6.0-rc5+ #314\nRIP: 0010:__alloc_pages+0x411/0x550\nCall Trace:\n \n __kmalloc_large_node+0xa2/0x200\n __kmalloc+0x16e/0x290\n ext4_resize_fs+0x481/0xd80\n __ext4_ioctl+0x1616/0x1d90\n ext4_ioctl+0x12/0x20\n __x64_sys_ioctl+0xf0/0x150\n do_syscall_64+0x3b/0x90\n==================================================================\n\nThis is because flexbg_size is too large and the size of the new_group_data\narray to be allocated exceeds MAX_ORDER. Currently, the minimum value of\nMAX_ORDER is 8, the minimum value of PAGE_SIZE is 4096, the corresponding\nmaximum number of groups that can be allocated is:\n\n (PAGE_SIZE << MAX_ORDER) / sizeof(struct ext4_new_group_data) ≈ 21845\n\nAnd the value that is down-aligned to the power of 2 is 16384. Therefore,\nthis value is defined as MAX_RESIZE_BG, and the number of groups added\neach time does not exceed this value during resizing, and is added multiple\ntimes to complete the online resizing. The difference is that the metadata\nin a flex_bg may be more dispersed.","state":0,"publishedAt":"2024-03-26T17:19:23.838+00:00","modifiedAt":"2026-10-15T00:17:06.25+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/ext4/resize.c\"\n ],\n \"versions\": [\n {\n \"version\": \"28c7bac0091687e6116ebd6c179e154ae4053c90\",\n \"lessThan\": \"cd1f93ca97a9136989f3bd2bf90696732a2ed644\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"28c7bac0091687e6116ebd6c179e154ae4053c90\",\n \"lessThan\": \"b183fe8702e78bba3dcef8e7193cab6898abee07\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"28c7bac0091687e6116ebd6c179e154ae4053c90\",\n \"lessThan\": \"cfbbb3199e71b63fc26cee0ebff327c47128a1e8\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"28c7bac0091687e6116ebd6c179e154ae4053c90\",\n \"lessThan\": \"d76c8d7ffe163c6bf2f1ef680b0539c2b3902b90\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"28c7bac0091687e6116ebd6c179e154ae4053c90\",\n \"lessThan\": \"6d2cbf517dcabc093159cf138ad5712c9c7fa954\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"28c7bac0091687e6116ebd6c179e154ae4053c90\",\n \"lessThan\": \"8b1413dbfe49646eda2c00c0f1144ee9d3368e0c\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"28c7bac0091687e6116ebd6c179e154ae4053c90\",\n \"lessThan\": \"dc3e0f55bec4410f3d74352c4a7c79f518088ee2\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"28c7bac0091687e6116ebd6c179e154ae4053c90\",\n \"lessThan\": \"5d1935ac02ca5aee364a449a35e2977ea84509b0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/ext4/resize.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.3\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.3\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.19.307\",\n \"lessThanOrEqual\": \"4.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.269\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.210\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.149\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.77\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.16\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.7.4\",\n \"lessThanOrEqual\": \"6.7.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.8\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/cd1f93ca97a9136989f3bd2bf90696732a2ed644","https://git.kernel.org/stable/c/b183fe8702e78bba3dcef8e7193cab6898abee07","https://git.kernel.org/stable/c/cfbbb3199e71b63fc26cee0ebff327c47128a1e8","https://git.kernel.org/stable/c/d76c8d7ffe163c6bf2f1ef680b0539c2b3902b90","https://git.kernel.org/stable/c/6d2cbf517dcabc093159cf138ad5712c9c7fa954","https://git.kernel.org/stable/c/8b1413dbfe49646eda2c00c0f1144ee9d3368e0c","https://git.kernel.org/stable/c/dc3e0f55bec4410f3d74352c4a7c79f518088ee2","https://git.kernel.org/stable/c/5d1935ac02ca5aee364a449a35e2977ea84509b0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-52622","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-52622","identifiers":["CVE-2023-52622"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-09T22:04:21.7510311+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T22:04:21.7510311+00:00","lastSuccessAt":"2026-11-09T22:04:21.9181937+00:00","error":null,"lastVerifiedAt":"2026-11-09T22:04:21.9181977+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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