SB2026072868 - Improper Check for Unusual or Exceptional Conditions in Linux kernel netfilter

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2026-64410)

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper handling of unsupported hardware offload configurations in netfilter flowtable hardware offload when processing IPIP tunnel flows. A remote attacker can send specially crafted network traffic to cause a denial of service.

The issue occurs in the IPIP tunnel hardware offload path, where unsupported flows may still be enqueued for offload processing.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6c5dcab95f4cd42a1648739ec9300fbb4b1a021f
• https://git.kernel.org/stable/c/9efe838c13133acb70c78d04c49e8362fe533566