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.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00064.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < d3b486946a4e62c7ef6023f7d9c1d049051384ba
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 3115313cf03113e87c87adee18ee49a20bbdb9ba
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < eea87acb6027be3dd4d3c57186bb22800d57fdda
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 359616ce587e524107730504891afa4b1a8be58c
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 0536f76a2bca83d1a3740517ba22cc93a44b3099
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 2c575c8905f7a8b32d5611b91856b69bac2a5bf1
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 67973caae78e21ee46a7281aaa8ca364eb9c444f
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 898f706695682b9954f280d95e49fa86ffa55d08
Linux Linux affected
Version Status Constraints
2.6.12 affected —
0 unaffected < 2.6.12
4.9.337 unaffected ≤ 4.9.*
4.14.303 unaffected ≤ 4.14.*
4.19.270 unaffected ≤ 4.19.*
5.4.229 unaffected ≤ 5.4.*
5.10.163 unaffected ≤ 5.10.*
5.15.86 unaffected ≤ 5.15.*
6.0.16 unaffected ≤ 6.0.*
6.1.2 unaffected ≤ 6.1.*
6.2 unaffected ≤ *

No data.

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/0536f76a2bca83d1a3740517ba22cc93a44b3099 cve-icon cve-icon
https://git.kernel.org/stable/c/2c575c8905f7a8b32d5611b91856b69bac2a5bf1 cve-icon cve-icon
https://git.kernel.org/stable/c/3115313cf03113e87c87adee18ee49a20bbdb9ba cve-icon cve-icon
https://git.kernel.org/stable/c/359616ce587e524107730504891afa4b1a8be58c cve-icon cve-icon
https://git.kernel.org/stable/c/3e997e4ce8ae7ab89d72334120f6aee49c5bbdbd cve-icon cve-icon
https://git.kernel.org/stable/c/67973caae78e21ee46a7281aaa8ca364eb9c444f cve-icon cve-icon
https://git.kernel.org/stable/c/898f706695682b9954f280d95e49fa86ffa55d08 cve-icon cve-icon
https://git.kernel.org/stable/c/d3b486946a4e62c7ef6023f7d9c1d049051384ba cve-icon cve-icon
https://git.kernel.org/stable/c/eea87acb6027be3dd4d3c57186bb22800d57fdda cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025102207-CVE-2022-50567-17f3@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2022-50567 cve-icon
https://www.cve.org/CVERecord?id=CVE-2022-50567 cve-icon
History

Tue, 23 Dec 2025 13:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Thu, 23 Oct 2025 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Thu, 23 Oct 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate

Wed, 22 Oct 2025 13:45:00 +0000

Type Values Removed Values Added
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.
Title fs: jfs: fix shift-out-of-bounds in dbAllocAG
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-12-23T13:29:59.536Z

Reserved: 2025-10-22T13:20:23.760Z

Link: CVE-2022-50567

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-22T14:15:41.533

Modified: 2025-10-22T21:12:48.953

Link: CVE-2022-50567

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-10-22T00:00:00Z

Links: CVE-2022-50567 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-10-23T10:07:38Z

Weaknesses

No weakness.