Bug 2370723 (CVE-2025-38002)

Summary: CVE-2025-38002 kernel: io_uring/fdinfo: grab ctx->uring_lock around io_uring_show_fdinfo()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-06-06 14:01:42 UTC 
In the Linux kernel, the following vulnerability has been resolved:

io_uring/fdinfo: grab ctx->uring_lock around io_uring_show_fdinfo()

Not everything requires locking in there, which is why the 'has_lock'
variable exists. But enough does that it's a bit unwieldy to manage.
Wrap the whole thing in a ->uring_lock trylock, and just return
with no output if we fail to grab it. The existing trylock() will
already have greatly diminished utility/output for the failure case.

This fixes an issue with reading the SQE fields, if the ring is being
actively resized at the same time.
Comment 1 Jon Moroney 2025-06-06 16:10:34 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025060644-CVE-2025-38002-5e89@gregkh/T