CVE-2026-80994 Linux Kernel openvswitch - Use After Free

Linux kernel openvswitch contains a use-after-free vulnerability caused by improper RCU locking order during flow deletion in flow mask handling, letting attackers cause kernel crashes, exploit requires network access to trigger flow deletion.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
11 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for ZDI-CAN-32042.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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