{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-52622", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-52622", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2024-03-26T17:19:23.838Z", "updatedAt": "2026-10-15T00:17:06.250Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "ext4: avoid online resizing failures due to oversized flex bg", "summary": "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.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "28c7bac0091687e6116ebd6c179e154ae4053c90", "status": "affected", "versionType": "git", "lessThan": "cd1f93ca97a9136989f3bd2bf90696732a2ed644" }, { "version": "28c7bac0091687e6116ebd6c179e154ae4053c90", "status": "affected", "versionType": "git", "lessThan": "b183fe8702e78bba3dcef8e7193cab6898abee07" }, { "version": "28c7bac0091687e6116ebd6c179e154ae4053c90", "status": "affected", "versionType": "git", "lessThan": "cfbbb3199e71b63fc26cee0ebff327c47128a1e8" }, { "version": "28c7bac0091687e6116ebd6c179e154ae4053c90", "status": "affected", "versionType": "git", "lessThan": "d76c8d7ffe163c6bf2f1ef680b0539c2b3902b90" }, { "version": "28c7bac0091687e6116ebd6c179e154ae4053c90", "status": "affected", "versionType": "git", "lessThan": "6d2cbf517dcabc093159cf138ad5712c9c7fa954" }, { "version": "28c7bac0091687e6116ebd6c179e154ae4053c90", "status": "affected", "versionType": "git", "lessThan": "8b1413dbfe49646eda2c00c0f1144ee9d3368e0c" }, { "version": "28c7bac0091687e6116ebd6c179e154ae4053c90", "status": "affected", "versionType": "git", "lessThan": "dc3e0f55bec4410f3d74352c4a7c79f518088ee2" }, { "version": "28c7bac0091687e6116ebd6c179e154ae4053c90", "status": "affected", "versionType": "git", "lessThan": "5d1935ac02ca5aee364a449a35e2977ea84509b0" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.3", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.3" }, { "version": "4.19.307", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.269", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.210", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.149", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.77", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.16", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.7.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.7.*" }, { "version": "6.8", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }