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VULNERABILITIES

CVE-2026-74406 Details

Description

In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive(). udp_tunnel_sock_release() could set sk->sk_user_data to NULL while vxlan_gro_prepare_receive() is running. Let's check if rcu_dereference_sk_user_data() is NULL after skb_gro_remcsum_init().

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: kernel.orgCVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://git.kernel.org/stable/c/08f40c0d23c67c3aa4224c3311e134999c721fb4 kernel.org
https://git.kernel.org/stable/c/30a45c0bffdd62350261e2f2689fdba426a33578 kernel.org
https://git.kernel.org/stable/c/4a8cde6f7281ea2c4c290f9ad9923b3631defceb kernel.org
https://git.kernel.org/stable/c/9c58c729d32e7cea5772cc44929c6cd61e5a31cd kernel.org
https://git.kernel.org/stable/c/ef44dac2a37f86eeae6b88ed10a6d60b35387dfd kernel.org

see all 6 references

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-74406
NVD Published Date:
Aug 15, 2026
NVD Last Modified:
Aug 17, 2026
Source:
kernel.org
CVE-2026-74406 Details - Not Deferred