vulnerability
Ubuntu: (CVE-2022-50864): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:S/C:N/I:N/A:C) | Jan 2, 2026 | Jan 6, 2026 | Jan 7, 2026 |
Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix shift-out-of-bounds due to too large exponent of block size If field s_log_block_size of superblock data is corrupted and too large, init_nilfs() and load_nilfs() still can trigger a shift-out-of-bounds warning followed by a kernel panic (if panic_on_warn is set): shift exponent 38973 is too large for 32-bit type 'int' Call Trace: <TASK> dump_stack_lvl+0xcd/0x134 ubsan_epilogue+0xb/0x50 __ubsan_handle_shift_out_of_bounds.cold.12+0x17b/0x1f5 init_nilfs.cold.11+0x18/0x1d [nilfs2] nilfs_mount+0x9b5/0x12b0 [nilfs2] ... This fixes the issue by adding and using a new helper function for getting block size with sanity check.
Solutions
References
- CVE-2022-50864
- https://attackerkb.com/topics/CVE-2022-50864
- URL-https://git.kernel.org/linus/ebeccaaef67a4895d2496ab8d9c2fb8d89201211
- URL-https://git.kernel.org/stable/c/8b6ef451b5701b37d9a5905534595776a662edfc
- URL-https://git.kernel.org/stable/c/a16731fa1b96226c75bbf18e73513b14fc318360
- URL-https://git.kernel.org/stable/c/ddb6615a168f97b91175e00eda4c644741cf531c
- URL-https://git.kernel.org/stable/c/ebeccaaef67a4895d2496ab8d9c2fb8d89201211
- URL-https://git.kernel.org/stable/c/ec93b5430ec0f60877a5388bb023d60624f9ab9f
- URL-https://www.cve.org/CVERecord?id=CVE-2022-50864
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