Bug 2376026 (CVE-2025-38095) - CVE-2025-38095 kernel: dma-buf: insert memory barrier before updating num_fences
Summary: CVE-2025-38095 kernel: dma-buf: insert memory barrier before updating num_fences
Keywords:
Status: NEW
Alias: CVE-2025-38095
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-07-03 08:01 UTC by OSIDB Bzimport
Modified: 2025-07-03 21:03 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2025-07-03 08:01:10 UTC 
In the Linux kernel, the following vulnerability has been resolved:

dma-buf: insert memory barrier before updating num_fences

smp_store_mb() inserts memory barrier after storing operation.
It is different with what the comment is originally aiming so Null
pointer dereference can be happened if memory update is reordered.
Comment 1 Avinash Hanwate 2025-07-03 20:54:51 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025070340-CVE-2025-38095-6596@gregkh/T
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