CVE-2026-90049 Linux Kernel - Data Corruption & Denial of Service

Linux kernel contains a vulnerability in skb_zerocopy() where skb_tx_error() is incorrectly called on the source skb, causing destructive operations and improper buffer ownership handling, letting attackers cause data corruption or denial of service, exploit requires crafted packet triggering skb_orphan_frags() failure.

CVSS base score 9.3 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Data Corruption
Impact
Denial Of Service, Data Tampering
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for skb_zerocopy()

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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