CVE-2026-80977 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability in net subsystem caused by improper handling of shared zerocopy state in skb_tx_error(), letting attackers cause memory corruption or data tampering via cloned skb packets, exploit requires packet cloning in Open vSwitch.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.13% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Data Tampering
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.

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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