CVE-2026-45846
published 2026-05-27CVE-2026-45846: In the Linux kernel, the following vulnerability has been resolved: bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()…
medium5.5
In the Linux kernel, the following vulnerability has been resolved:
bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()
bareudp_fill_metadata_dst() passes bareudp->sock to
udp_tunnel6_dst_lookup() in the IPv6 path without a NULL check.
The socket is only created in bareudp_open() and NULLed in
bareudp_stop(), so calling this function while the device is down
triggers a NULL dereference via sock->sk.
BUG: kernel NULL pointer dereference, address: 0000000000000018
RIP: 0010:udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:160)
Call Trace:
bareudp_fill_metadata_dst (drivers/net/bareudp.c:532)
do_execute_actions (net/openvswitch/actions.c:901)
ovs_execute_actions (net/openvswitch/actions.c:1589)
ovs_packet_cmd_execute (net/openvswitch/datapath.c:700)
genl_family_rcv_msg_doit (net/netlink/genetlink.c:1114)
genl_rcv_msg (net/netlink/genetlink.c:1209)
netlink_rcv_skb (net/netlink/af_netlink.c:2550)
Add a NULL check returning -ESHUTDOWN, consistent with the xmit paths
in the same driver.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| linux | linux | — | — |
| linux | linux | >= 571912c69f0ed731bd1e071ade9dc7ca4aa52065 < 31e010a106ff6cd8ccac4bfee547fd3fa1015574 | 31e010a106ff6cd8ccac4bfee547fd3fa1015574 |
| linux | linux | >= 571912c69f0ed731bd1e071ade9dc7ca4aa52065 < 55193df8d6d33318435f19572bf5ea47a22eee28 | 55193df8d6d33318435f19572bf5ea47a22eee28 |
| linux | linux | >= 571912c69f0ed731bd1e071ade9dc7ca4aa52065 < 51eef9c072aa3405a6823a96ae666d38a3b48750 | 51eef9c072aa3405a6823a96ae666d38a3b48750 |
| linux | linux | >= 571912c69f0ed731bd1e071ade9dc7ca4aa52065 < a0f4e4e8e0f5e24ddd83e3d1221732621cf34636 | a0f4e4e8e0f5e24ddd83e3d1221732621cf34636 |
| linux | linux | >= 571912c69f0ed731bd1e071ade9dc7ca4aa52065 < 35a115a204be08f97450b0389413e218268ef4a2 | 35a115a204be08f97450b0389413e218268ef4a2 |
| linux | linux | >= 571912c69f0ed731bd1e071ade9dc7ca4aa52065 < 74a02921c48fcd35a7881956c9e5c52b86595f5d | 74a02921c48fcd35a7881956c9e5c52b86595f5d |
| linux | linux | >= 571912c69f0ed731bd1e071ade9dc7ca4aa52065 < 638905520fc4fae6a80991563f264131545ba3df | 638905520fc4fae6a80991563f264131545ba3df |
| linux | linux | >= 571912c69f0ed731bd1e071ade9dc7ca4aa52065 < aa6c6d9ee064aabfede4402fd1283424e649ca19 | aa6c6d9ee064aabfede4402fd1283424e649ca19 |
| linux | linux_kernel | — | — |