CVE-2026-74406vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 5602c48cf87562c2f95b831d690631935e834295 builds before 9c58c729d32e7cea5772cc44929c6cd61e5a31cd; from 5602c48cf87562c2f95b831d690631935e834295 before f79c80f173fda9545b220c1f094b65fc06c252d0; 5602c48cf87562c2f95b831d690631935e834295 builds before 08f40c0d23c67c3aa4224c3311e134999c721fb4; 5602c48cf87562c2f95b831d690631935e834295 builds before 4a8cde6f7281ea2c4c290f9ad9923b3631defceb; from 5602c48cf87562c2f95b831d690631935e834295 before ef44dac2a37f86eeae6b88ed10a6d60b35387dfd; 5602c48cf87562c2f95b831d690631935e834295 builds before 30a45c0bffdd62350261e2f2689fdba426a33578 | CNA record |
References
- https://git.kernel.org/stable/c/9c58c729d32e7cea5772cc44929c6cd61e5a31cd
- https://git.kernel.org/stable/c/f79c80f173fda9545b220c1f094b65fc06c252d0
- https://git.kernel.org/stable/c/08f40c0d23c67c3aa4224c3311e134999c721fb4
- https://git.kernel.org/stable/c/4a8cde6f7281ea2c4c290f9ad9923b3631defceb
- https://git.kernel.org/stable/c/ef44dac2a37f86eeae6b88ed10a6d60b35387dfd
- https://git.kernel.org/stable/c/30a45c0bffdd62350261e2f2689fdba426a33578
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.