{"id":"CVE-2022-50864","summary":"nilfs2: fix shift-out-of-bounds due to too large exponent of block size","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix shift-out-of-bounds due to too large exponent of block size\n\nIf field s_log_block_size of superblock data is corrupted and too large,\ninit_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds\nwarning followed by a kernel panic (if panic_on_warn is set):\n\n shift exponent 38973 is too large for 32-bit type 'int'\n Call Trace:\n  \u003cTASK\u003e\n  dump_stack_lvl+0xcd/0x134\n  ubsan_epilogue+0xb/0x50\n  __ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5\n  init_nilfs.cold.11+0x18/0x1d [nilfs2]\n  nilfs_mount+0x9b5/0x12b0 [nilfs2]\n  ...\n\nThis fixes the issue by adding and using a new helper function for getting\nblock size with sanity check.","modified":"2026-04-02T08:28:48.187928Z","published":"2025-12-30T12:15:36.489Z","related":["SUSE-SU-2026:0263-1","SUSE-SU-2026:0317-1","SUSE-SU-2026:0411-1","SUSE-SU-2026:0617-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50864.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/8b6ef451b5701b37d9a5905534595776a662edfc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a16731fa1b96226c75bbf18e73513b14fc318360"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ddb6615a168f97b91175e00eda4c644741cf531c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ebeccaaef67a4895d2496ab8d9c2fb8d89201211"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ec93b5430ec0f60877a5388bb023d60624f9ab9f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50864.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50864"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8a9d2191e9f43bbcd256a9a6871bd73434c83f2f"},{"fixed":"ec93b5430ec0f60877a5388bb023d60624f9ab9f"},{"fixed":"8b6ef451b5701b37d9a5905534595776a662edfc"},{"fixed":"ddb6615a168f97b91175e00eda4c644741cf531c"},{"fixed":"a16731fa1b96226c75bbf18e73513b14fc318360"},{"fixed":"ebeccaaef67a4895d2496ab8d9c2fb8d89201211"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50864.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.30"},{"fixed":"5.10.163"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.86"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.0.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.1.0"},{"fixed":"6.1.2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50864.json"}}],"schema_version":"1.7.5"}