# CVE-2022-50864: linux: In the Linux kernel, the following vulnerability has been resolved:  nilfs2: fix shift-out-of-bounds due to too large...

CVE-2022-50864 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50864, released December 30, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-50864
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 30, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.4-1 | [DEBIAN-CVE-2022-50864](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50864.md) | Dec 30, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.4-1 | [DEBIAN-CVE-2022-50864](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50864.md) | Dec 30, 2025 |
| Linux | linux Debian 14 | 6.1.4-1 | [DEBIAN-CVE-2022-50864](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50864.md) | Dec 30, 2025 |

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