CVE-2022-50859
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.
Affected versions
Linux kernel versions
5.0
and later are affected. Fixed in
5.4.220,
5.10.150,
5.15.75,
5.19.17,
6.0.3,
6.1
and their respective stable series.
References
The following references provide additional information about CVE-2022-50859 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/60480291c1fcafad8425d93f771b5bcc2bd398b4
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PatchKernel patch commithttps://git.kernel.org/stable/c/9312e04b6c6bc46354ecd0cc82052a2b3df0b529
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PatchKernel patch commithttps://git.kernel.org/stable/c/943eb0ede74ecd609fdfd3f0b83e0d237613e526
Frequently asked questions
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What is CVE-2022-50859?
CVE-2022-50859 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.0 onward and has been patched in 5.4.220, 5.10.150, 5.15.75 and others. CVE-2022-50859 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2022-50859?
Yes — CVE-2022-50859 has been patched. Fixed versions include 5.4.220, 5.10.150, 5.15.75 and others. If you are running Linux kernel 5.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2022-50859 actively exploited?
No — CVE-2022-50859 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.