CVE-2023-54250
In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within the SMB request boundary; deassemble_neg_contexts() only checks that the eight byte smb2_neg_context header + (client controlled) DataLength are within the packet boundary, which is insufficient. Checking for sizeof(struct smb2_preauth_neg_context) is overkill given that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.
Affected versions
Linux kernel versions
5.15
and later are affected. Fixed in
5.15.145,
6.1.25,
6.2.12,
6.3
and their respective stable series.
References
The following references provide additional information about CVE-2023-54250 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/39f5b4b313b445c980a2a295bed28228c29228ed
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PatchKernel patch commithttps://git.kernel.org/stable/c/a2f6ded41bec1d3be643c80a5eb97f1680309001
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PatchKernel patch commithttps://git.kernel.org/stable/c/e7067a446264a7514fa1cfaa4052cdb6803bc6a2
Frequently asked questions
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What is CVE-2023-54250?
CVE-2023-54250 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.15 onward and has been patched in 5.15.145, 6.1.25, 6.2.12 and others. CVE-2023-54250 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-2023-54250?
Yes — CVE-2023-54250 has been patched. Fixed versions include 5.15.145, 6.1.25, 6.2.12 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2023-54250 actively exploited?
No — CVE-2023-54250 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.