Bug 2376055 (CVE-2025-38101)

Summary: CVE-2025-38101 kernel: Linux kernel: Privilege escalation or denial of service due to improper buffer locking in ring-buffer
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: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the Linux kernel's ring-buffer component. A local attacker could exploit improper buffer locking in the `ring_buffer_subbuf_order_set()` function. This could lead to list corruption and other concurrency-related issues, potentially resulting in privilege escalation or a denial of service (DoS).
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-07-03 09:02:39 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ring-buffer: Fix buffer locking in ring_buffer_subbuf_order_set()

Enlarge the critical section in ring_buffer_subbuf_order_set() to
ensure that error handling takes place with per-buffer mutex held,
thus preventing list corruption and other concurrency-related issues.
Comment 1 Avinash Hanwate 2025-07-03 18:24:28 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025070321-CVE-2025-38101-56c1@gregkh/T