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CVE-2026-68321: net: txgbe: fix FDIR filter leak on remove

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-10 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: net: txgbe: fix FDIR filter leak on remove Perfect FDIR filters can be added while the interface is down and are kept on the software list for later restore. unregister_netdev() only calls ndo_stop when the device is up, so txgbe_fdir_filter_exit() in txgbe_close() is skipped in that case and the filters are leaked on driver remove. Free the filter list from txgbe_remove() as well.

Affected products

• Linux kernel: 6.11 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2d34421bfa261f7e83bea2f2f75fa75e0c3037d1
• https://git.kernel.org/stable/c/4946dea2386333e5d93bfb36df803fefb5a8c635
• https://git.kernel.org/stable/c/5c2f04258be2645cdd8f87553990948e7054e7fb
• https://git.kernel.org/stable/c/ecaa37826340520664a4e5522f803ff48fc3f564

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