Bug 2426056 (CVE-2022-50859) - CVE-2022-50859 kernel: cifs: Fix the error length of VALIDATE_NEGOTIATE_INFO message
Summary: CVE-2022-50859 kernel: cifs: Fix the error length of VALIDATE_NEGOTIATE_INFO ...
Keywords:
Status: NEW
Alias: CVE-2022-50859
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-30 13:05 UTC by OSIDB Bzimport
Modified: 2025-12-31 12:23 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2025-12-30 13:05:28 UTC
In the Linux kernel, the following vulnerability has been resolved:

cifs: Fix the error length of VALIDATE_NEGOTIATE_INFO message

Commit d5c7076b772a ("smb3: add smb3.1.1 to default dialect list")
extend the dialects from 3 to 4, but forget to decrease the extended
length when specific the dialect, then the message length is larger
than expected.

This maybe leak some info through network because not initialize the
message body.

After apply this patch, the VALIDATE_NEGOTIATE_INFO message length is
reduced from 28 bytes to 26 bytes.


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