Bug 2348552 (CVE-2025-21711)

Summary: CVE-2025-21711 kernel: net/rose: prevent integer overflows in rose_setsockopt()
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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Description OSIDB Bzimport 2025-02-27 03:02:57 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net/rose: prevent integer overflows in rose_setsockopt()

In case of possible unpredictably large arguments passed to
rose_setsockopt() and multiplied by extra values on top of that,
integer overflows may occur.

Do the safest minimum and fix these issues by checking the
contents of 'opt' and returning -EINVAL if they are too large. Also,
switch to unsigned int and remove useless check for negative 'opt'
in ROSE_IDLE case.
Comment 1 Michal Findra 2025-02-27 17:45:41 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022644-CVE-2025-21711-9e79@gregkh/T