# CVE-2022-50567: linux: In the Linux kernel, the following vulnerability has been resolved:  fs: jfs: fix shift-out-of-bounds in dbAllocAG  S...

CVE-2022-50567 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50567, released October 22, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-50567
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 22, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  fs: jfs: fix shift-out-of-bounds in dbAllocAG  Syzbot found a crash : UBSAN: shift-out-of-bounds in dbAllocAG. The underlying bug is the missing check of bmp->db_agl2size. The field can be greater than 64 and trigger the shift-out-of-bounds.  Fix this bug by adding a check of bmp->db_agl2size in dbMount since this field is used in many following functions. The upper bound for this field is L2MAXL2SIZE - L2MAXAG, thanks for the help of Dave Kleikamp. Note that, for maintenance, I reorganized error handling code of dbMount.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.4-1 | [DEBIAN-CVE-2022-50567](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50567.md) | Oct 22, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.4-1 | [DEBIAN-CVE-2022-50567](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50567.md) | Oct 22, 2025 |
| Linux | linux Debian 14 | 6.1.4-1 | [DEBIAN-CVE-2022-50567](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50567.md) | Oct 22, 2025 |

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