CVE-2023-53817
In the Linux kernel, the following vulnerability has been resolved: crypto: lib/mpi - avoid null pointer deref in mpi_cmp_ui() During NVMeTCP Authentication a controller can trigger a kernel oops by specifying the 8192 bit Diffie Hellman group and passing a correctly sized, but zeroed Diffie Hellamn value. mpi_cmp_ui() was detecting this if the second parameter was 0, but 1 is passed from dh_is_pubkey_valid(). This causes the null pointer u->d to be dereferenced towards the end of mpi_cmp_ui()
Affected versions
Linux kernel versions
3.7
and later are affected. Fixed in
4.14.326,
4.19.295,
5.4.257,
5.10.197,
5.15.133,
6.1.55,
6.5.5,
6.6
and their respective stable series.
References
The following references provide additional information about CVE-2023-53817 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/0fc7147c694394f8a8cbc19570c6bc918cac0906
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PatchKernel patch commithttps://git.kernel.org/stable/c/12ac013ad7ff0df066451e825801d805095b3776
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PatchKernel patch commithttps://git.kernel.org/stable/c/61f5453e9706e99713825594e0c8f9031485fb5f
Frequently asked questions
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What is CVE-2023-53817?
CVE-2023-53817 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.7 onward and has been patched in 4.14.326, 4.19.295, 5.4.257 and others. CVE-2023-53817 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-2023-53817?
Yes — CVE-2023-53817 has been patched. Fixed versions include 4.14.326, 4.19.295, 5.4.257 and others. If you are running Linux kernel 3.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2023-53817 actively exploited?
No — CVE-2023-53817 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.