bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()
Summary
| CVE | CVE-2026-45846 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-27 11:16:24 UTC |
| Updated | 2026-06-01 17:17:15 UTC |
| Description | 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: <TASK> 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) </TASK> Add a NULL check returning -ESHUTDOWN, consistent with the xmit paths in the same driver. |
Risk And Classification
EPSS: 0.000180000 probability, percentile 0.050770000 (date 2026-06-01)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 571912c69f0ed731bd1e071ade9dc7ca4aa52065 31e010a106ff6cd8ccac4bfee547fd3fa1015574 git | Not specified |
| CNA | Linux | Linux | affected 571912c69f0ed731bd1e071ade9dc7ca4aa52065 55193df8d6d33318435f19572bf5ea47a22eee28 git | Not specified |
| CNA | Linux | Linux | affected 571912c69f0ed731bd1e071ade9dc7ca4aa52065 51eef9c072aa3405a6823a96ae666d38a3b48750 git | Not specified |
| CNA | Linux | Linux | affected 571912c69f0ed731bd1e071ade9dc7ca4aa52065 a0f4e4e8e0f5e24ddd83e3d1221732621cf34636 git | Not specified |
| CNA | Linux | Linux | affected 571912c69f0ed731bd1e071ade9dc7ca4aa52065 35a115a204be08f97450b0389413e218268ef4a2 git | Not specified |
| CNA | Linux | Linux | affected 571912c69f0ed731bd1e071ade9dc7ca4aa52065 74a02921c48fcd35a7881956c9e5c52b86595f5d git | Not specified |
| CNA | Linux | Linux | affected 571912c69f0ed731bd1e071ade9dc7ca4aa52065 638905520fc4fae6a80991563f264131545ba3df git | Not specified |
| CNA | Linux | Linux | affected 571912c69f0ed731bd1e071ade9dc7ca4aa52065 aa6c6d9ee064aabfede4402fd1283424e649ca19 git | Not specified |
| CNA | Linux | Linux | affected 5.7 | Not specified |
| CNA | Linux | Linux | unaffected 5.7 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.258 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.209 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.175 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.141 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.91 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.33 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.10 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1-rc2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/35a115a204be08f97450b0389413e218268ef4a2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/aa6c6d9ee064aabfede4402fd1283424e649ca19 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/51eef9c072aa3405a6823a96ae666d38a3b48750 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/638905520fc4fae6a80991563f264131545ba3df | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/55193df8d6d33318435f19572bf5ea47a22eee28 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/31e010a106ff6cd8ccac4bfee547fd3fa1015574 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/74a02921c48fcd35a7881956c9e5c52b86595f5d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a0f4e4e8e0f5e24ddd83e3d1221732621cf34636 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.