Bug 2322301 (CVE-2024-50080)

Summary: CVE-2024-50080 kernel: ublk: don't allow user copy for unprivileged device
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: 2322368    
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Description OSIDB Bzimport 2024-10-29 01:01:08 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ublk: don't allow user copy for unprivileged device

UBLK_F_USER_COPY requires userspace to call write() on ublk char
device for filling request buffer, and unprivileged device can't
be trusted.

So don't allow user copy for unprivileged device.
Comment 1 Michal Findra 2024-10-29 07:59:54 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024102936-CVE-2024-50080-72ba@gregkh/T