Bug 2400630 (CVE-2025-39922)

Summary: CVE-2025-39922 kernel: ixgbe: fix incorrect map used in eee linkmode
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-10-01 09:01:51 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ixgbe: fix incorrect map used in eee linkmode

incorrectly used ixgbe_lp_map in loops intended to populate the
supported and advertised EEE linkmode bitmaps based on ixgbe_ls_map.
This results in incorrect bit setting and potential out-of-bounds
access, since ixgbe_lp_map and ixgbe_ls_map have different sizes
and purposes.

ixgbe_lp_map[i] -> ixgbe_ls_map[i]

Use ixgbe_ls_map for supported and advertised linkmodes, and keep
ixgbe_lp_map usage only for link partner (lp_advertised) mapping.
Comment 1 Alexander B 2025-10-02 11:42:58 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100120-CVE-2025-39922-36d0@gregkh/T