Bug 2376404 (CVE-2025-38187)

Summary: CVE-2025-38187 kernel: drm/nouveau: fix a use-after-free in r535_gsp_rpc_push()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-07-04 14:04:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/nouveau: fix a use-after-free in r535_gsp_rpc_push()

The RPC container is released after being passed to r535_gsp_rpc_send().

When sending the initial fragment of a large RPC and passing the
caller's RPC container, the container will be freed prematurely. Subsequent
attempts to send remaining fragments will therefore result in a
use-after-free.

Allocate a temporary RPC container for holding the initial fragment of a
large RPC when sending. Free the caller's container when all fragments
are successfully sent.

[ Rebase onto Blackwell changes. - Danilo ]
Comment 1 Avinash Hanwate 2025-07-07 03:46:58 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025070413-CVE-2025-38187-dafd@gregkh/T