Bug 2396927 (CVE-2025-39858)

Summary: CVE-2025-39858 kernel: eth: mlx4: Fix IS_ERR() vs NULL check bug in mlx4_en_create_rx_ring
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 2025-09-19 16:02:09 UTC 
In the Linux kernel, the following vulnerability has been resolved:

eth: mlx4: Fix IS_ERR() vs NULL check bug in mlx4_en_create_rx_ring

Replace NULL check with IS_ERR() check after calling page_pool_create()
since this function returns error pointers (ERR_PTR).
Using NULL check could lead to invalid pointer dereference.
Comment 1 Jon Moroney 2025-09-19 17:06:29 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091905-CVE-2025-39858-393c@gregkh/T