CVE-2022-50333
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-15

Last updated on: 2025-12-04

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: fs: jfs: fix shift-out-of-bounds in dbDiscardAG This should be applied to most URSAN bugs found recently by syzbot, by guarding the dbMount. As syzbot feeding rubbish into the bmap descriptor.
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Meta Information
Published
2025-09-15
Last Modified
2025-12-04
Generated
2026-06-16
AI Q&A
2025-09-15
EPSS Evaluated
2026-06-15
NVD
CVE-2022-50333
Affected Vendors & Products
Showing 8 associated CPEs
Vendor Product Version / Range
linux linux_kernel to 4.9.337 (exc)
linux linux_kernel From 4.10 (inc) to 4.14.303 (exc)
linux linux_kernel From 4.15 (inc) to 4.19.270 (exc)
linux linux_kernel From 4.20 (inc) to 5.4.229 (exc)
linux linux_kernel From 5.5 (inc) to 5.10.163 (exc)
linux linux_kernel From 5.11 (inc) to 5.15.86 (exc)
linux linux_kernel From 5.16 (inc) to 6.0.16 (exc)
linux linux_kernel From 6.1 (inc) to 6.1.2 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-125 The product reads data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability is a flaw in the Linux kernel's JFS filesystem code where a shift operation goes out-of-bounds in the dbDiscardAG function. It occurs because the kernel does not properly guard the dbMount when handling inputs, allowing malformed data (rubbish) fed by syzbot into the bmap descriptor to cause issues.

Impact Analysis

The vulnerability could lead to unexpected behavior or crashes in the Linux kernel when processing JFS filesystem operations, potentially causing system instability or denial of service due to improper handling of malformed inputs.

Mitigation Strategies

Apply the patch that fixes the shift-out-of-bounds issue in the jfs filesystem code of the Linux kernel, specifically the fix for dbDiscardAG as described. This update guards against invalid input to the bmap descriptor and addresses the vulnerability reported by syzbot.

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