Bug 2393527 (CVE-2025-38737)

Summary: CVE-2025-38737 kernel: cifs: Fix oops due to uninitialised variable
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-09-05 18:04:25 UTC 
In the Linux kernel, the following vulnerability has been resolved:

cifs: Fix oops due to uninitialised variable

Fix smb3_init_transform_rq() to initialise buffer to NULL before calling
netfs_alloc_folioq_buffer() as netfs assumes it can append to the buffer it
is given.  Setting it to NULL means it should start a fresh buffer, but the
value is currently undefined.
Comment 1 Jon Moroney 2025-09-05 21:02:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025090544-CVE-2025-38737-4cde@gregkh/T
Comment 3 errata-xmlrpc 2025-12-08 14:42:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:22854 https://access.redhat.com/errata/RHSA-2025:22854