Bug 2383402 (CVE-2025-38408)

Summary: CVE-2025-38408 kernel: Linux kernel: Denial of Service via improper pointer initialization
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel. Improper initialization of internal pointers in the `genirq/irq_sim` module can lead to incorrect memory access. A local attacker with low privileges could exploit this, potentially causing a denial of service (DoS) by making the system crash.
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Description OSIDB Bzimport 2025-07-25 14:02:43 UTC 
In the Linux kernel, the following vulnerability has been resolved:

genirq/irq_sim: Initialize work context pointers properly

Initialize `ops` member's pointers properly by using kzalloc() instead of
kmalloc() when allocating the simulation work context. Otherwise the
pointers contain random content leading to invalid dereferencing.
Comment 1 Jon Moroney 2025-07-25 19:19:43 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025072520-CVE-2025-38408-29e7@gregkh/T