{"id":"CVE-2022-50864","state":"PUBLISHED","title":"nilfs2: fix shift-out-of-bounds due to too large exponent of block size","description":"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  <TASK>\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.","publishedAt":"2025-12-30T12:15:36.489Z","updatedAt":"2026-05-11T19:26:35.896Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8a9d2191e9f43bbcd256a9a6871bd73434c83f2f","status":"affected","lessThan":"ec93b5430ec0f60877a5388bb023d60624f9ab9f","versionType":"git"},{"version":"8a9d2191e9f43bbcd256a9a6871bd73434c83f2f","status":"affected","lessThan":"8b6ef451b5701b37d9a5905534595776a662edfc","versionType":"git"},{"version":"8a9d2191e9f43bbcd256a9a6871bd73434c83f2f","status":"affected","lessThan":"ddb6615a168f97b91175e00eda4c644741cf531c","versionType":"git"},{"version":"8a9d2191e9f43bbcd256a9a6871bd73434c83f2f","status":"affected","lessThan":"a16731fa1b96226c75bbf18e73513b14fc318360","versionType":"git"},{"version":"8a9d2191e9f43bbcd256a9a6871bd73434c83f2f","status":"affected","lessThan":"ebeccaaef67a4895d2496ab8d9c2fb8d89201211","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nilfs2/the_nilfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.30","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.30","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.86","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.16","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.2","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nilfs2/the_nilfs.c"]}],"references":["https://git.kernel.org/stable/c/ec93b5430ec0f60877a5388bb023d60624f9ab9f","https://git.kernel.org/stable/c/8b6ef451b5701b37d9a5905534595776a662edfc","https://git.kernel.org/stable/c/ddb6615a168f97b91175e00eda4c644741cf531c","https://git.kernel.org/stable/c/a16731fa1b96226c75bbf18e73513b14fc318360","https://git.kernel.org/stable/c/ebeccaaef67a4895d2496ab8d9c2fb8d89201211"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50864.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50864","state":"PUBLISHED","datePublished":"2025-12-30T12:15:36.489Z","dateUpdated":"2026-05-11T19:26:35.896Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-30T12:06:07.135Z"},"containers":{"cna":{"title":"nilfs2: fix shift-out-of-bounds due to too large exponent of block size","descriptions":[{"lang":"en","value":"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  <TASK>\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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8a9d2191e9f43bbcd256a9a6871bd73434c83f2f","status":"affected","lessThan":"ec93b5430ec0f60877a5388bb023d60624f9ab9f","versionType":"git"},{"version":"8a9d2191e9f43bbcd256a9a6871bd73434c83f2f","status":"affected","lessThan":"8b6ef451b5701b37d9a5905534595776a662edfc","versionType":"git"},{"version":"8a9d2191e9f43bbcd256a9a6871bd73434c83f2f","status":"affected","lessThan":"ddb6615a168f97b91175e00eda4c644741cf531c","versionType":"git"},{"version":"8a9d2191e9f43bbcd256a9a6871bd73434c83f2f","status":"affected","lessThan":"a16731fa1b96226c75bbf18e73513b14fc318360","versionType":"git"},{"version":"8a9d2191e9f43bbcd256a9a6871bd73434c83f2f","status":"affected","lessThan":"ebeccaaef67a4895d2496ab8d9c2fb8d89201211","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nilfs2/the_nilfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.30","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.30","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.86","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.16","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.2","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nilfs2/the_nilfs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ec93b5430ec0f60877a5388bb023d60624f9ab9f"},{"url":"https://git.kernel.org/stable/c/8b6ef451b5701b37d9a5905534595776a662edfc"},{"url":"https://git.kernel.org/stable/c/ddb6615a168f97b91175e00eda4c644741cf531c"},{"url":"https://git.kernel.org/stable/c/a16731fa1b96226c75bbf18e73513b14fc318360"},{"url":"https://git.kernel.org/stable/c/ebeccaaef67a4895d2496ab8d9c2fb8d89201211"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:26:35.896Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"5.10.163"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"5.15.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.0.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.1.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}