Bug 2320184 (CVE-2024-47698)

Summary: CVE-2024-47698 kernel: drivers: media: dvb-frontends/rtl2832: fix an out-of-bounds write error
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: 2320332    
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Description OSIDB Bzimport 2024-10-21 12:02:28 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drivers: media: dvb-frontends/rtl2832: fix an out-of-bounds write error

Ensure index in rtl2832_pid_filter does not exceed 31 to prevent
out-of-bounds access.

dev->filters is a 32-bit value, so set_bit and clear_bit functions should
only operate on indices from 0 to 31. If index is 32, it will attempt to
access a non-existent 33rd bit, leading to out-of-bounds access.
Change the boundary check from index > 32 to index >= 32 to resolve this
issue.

[hverkuil: added fixes tag, rtl2830_pid_filter -> rtl2832_pid_filter in logmsg]
Comment 1 Michal Findra 2024-10-21 14:52:29 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024102113-CVE-2024-47698-d5fe@gregkh/T