CVE-2026-74406

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Source

https://cve.org/CVERecord?id=CVE-2026-74406

Import Source

JSON Data

https://api.test.osv.dev/v1/vulns/CVE-2026-74406

Downstream

Published

2026-08-15T05:59:15Z

Modified

2026-08-18T04:17:30Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().

Details

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().

Database specific

{
    "cna_assigner":  "Linux",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74406.json"
}

References

Affected packages

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

5602c48cf87562c2f95b831d690631935e834295

Fixed

9c58c729d32e7cea5772cc44929c6cd61e5a31cd

Fixed

f79c80f173fda9545b220c1f094b65fc06c252d0

Fixed

08f40c0d23c67c3aa4224c3311e134999c721fb4

Fixed

4a8cde6f7281ea2c4c290f9ad9923b3631defceb

Fixed

ef44dac2a37f86eeae6b88ed10a6d60b35387dfd

Fixed

30a45c0bffdd62350261e2f2689fdba426a33578

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-74406.json"

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-74406.json"