Bug 2324870 (CVE-2024-50233)

Summary: CVE-2024-50233 kernel: staging: iio: frequency: ad9832: fix division by zero in ad9832_calc_freqreg()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Bug Depends On: 2325091    
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Description OSIDB Bzimport 2024-11-09 11:02:21 UTC 
In the Linux kernel, the following vulnerability has been resolved:

staging: iio: frequency: ad9832: fix division by zero in ad9832_calc_freqreg()

In the ad9832_write_frequency() function, clk_get_rate() might return 0.
This can lead to a division by zero when calling ad9832_calc_freqreg().
The check if (fout > (clk_get_rate(st->mclk) / 2)) does not protect
against the case when fout is 0. The ad9832_write_frequency() function
is called from ad9832_write(), and fout is derived from a text buffer,
which can contain any value.
Comment 1 Avinash Hanwate 2024-11-11 05:11:18 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024110930-CVE-2024-50233-d5c3@gregkh/T