Bug 2393179 (CVE-2025-38726) - CVE-2025-38726 kernel: net: ftgmac100: fix potential NULL pointer access in ftgmac100_phy_disconnect
Summary: CVE-2025-38726 kernel: net: ftgmac100: fix potential NULL pointer access in f...
Keywords:
Status: NEW
Alias: CVE-2025-38726
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-09-04 16:03 UTC by OSIDB Bzimport
Modified: 2025-11-26 07:31 UTC (History)
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Description OSIDB Bzimport 2025-09-04 16:03:15 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: ftgmac100: fix potential NULL pointer access in ftgmac100_phy_disconnect

After the call to phy_disconnect() netdev->phydev is reset to NULL.
So fixed_phy_unregister() would be called with a NULL pointer as argument.
Therefore cache the phy_device before this call.
Comment 1 Jon Moroney 2025-09-04 18:11:59 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025090402-CVE-2025-38726-e4a8@gregkh/T
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