SB20260812202 - Memory leak in Linux kernel wangxun txgbe driver

Description

This security bulletin contains information about 1 vulnerability.

1) Memory leak (CVE-ID: CVE-2026-68321)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a memory leak in the txgbe driver FDIR filter cleanup logic when removing the driver after adding perfect FDIR filters while the interface is down. A local user can add perfect FDIR filters and trigger driver removal to cause a denial of service.

The issue occurs because filters kept on the software list for later restore are not freed if unregister_netdev() does not call ndo_stop.

Remediation

Install update from vendor's website.

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