CVE-2026-74406
CVE-2026-74406: 1 tracked advisory record across Red Hat. Compare vendor sources.
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Red Hat
1 advisory- Advisory severityMedium5.5
Medium [CVE-2026-74406] Fix potential null-ptr-deref in vxlan_gro_prepare_receive
CVE-2026-74406Source published Source updated
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(). A flaw was found in the Linux kernel's Virtual Extensible LAN (VXLAN) component. A race condition can occur where the `udp_tunnel_sock_release()` function sets a socket's user data to NULL while the `vxlan_gro_prepare_receive()` function is still actively using it. This could lead to a null pointer dereference, potentially causing a system crash or denial of service. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat package: kernel-rt
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
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