High 7.8Published Oct 22, 2025

CVE-2022-50567fs: jfs: fix shift-out-of-bounds in dbAllocAG

Updated under an hour ago (Oct 28, 2026, 7:10 AM ET)

Does this affect you?

It affects Linux. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d3b486946a4e62c7ef6023f7d9c1d049051384ba; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3115313cf03113e87c87adee18ee49a20bbdb9ba; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before eea87acb6027be3dd4d3c57186bb22800d57fdda; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 359616ce587e524107730504891afa4b1a8be58c; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0536f76a2bca83d1a3740517ba22cc93a44b3099; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2c575c8905f7a8b32d5611b91856b69bac2a5bf1; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 67973caae78e21ee46a7281aaa8ca364eb9c444f; and 1 more ranges	CNA record

References

References

https://git.kernel.org/stable/c/d3b486946a4e62c7ef6023f7d9c1d049051384ba
https://git.kernel.org/stable/c/3115313cf03113e87c87adee18ee49a20bbdb9ba
https://git.kernel.org/stable/c/eea87acb6027be3dd4d3c57186bb22800d57fdda
https://git.kernel.org/stable/c/359616ce587e524107730504891afa4b1a8be58c
https://git.kernel.org/stable/c/3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd
https://git.kernel.org/stable/c/0536f76a2bca83d1a3740517ba22cc93a44b3099
https://git.kernel.org/stable/c/2c575c8905f7a8b32d5611b91856b69bac2a5bf1
https://git.kernel.org/stable/c/67973caae78e21ee46a7281aaa8ca364eb9c444f
https://git.kernel.org/stable/c/898f706695682b9954f280d95e49fa86ffa55d08

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.