CVE-2026-45846 (GCVE-0-2026-45846)

Vulnerability from cvelistv5 – Published: 2026-05-27 09:24 – Updated: 2026-06-14 17:46
VLAI
Title
bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 571912c69f0ed731bd1e071ade9dc7ca4aa52065 , < 31e010a106ff6cd8ccac4bfee547fd3fa1015574 (git)
Affected: 571912c69f0ed731bd1e071ade9dc7ca4aa52065 , < 55193df8d6d33318435f19572bf5ea47a22eee28 (git)
Affected: 571912c69f0ed731bd1e071ade9dc7ca4aa52065 , < 51eef9c072aa3405a6823a96ae666d38a3b48750 (git)
Affected: 571912c69f0ed731bd1e071ade9dc7ca4aa52065 , < a0f4e4e8e0f5e24ddd83e3d1221732621cf34636 (git)
Affected: 571912c69f0ed731bd1e071ade9dc7ca4aa52065 , < 35a115a204be08f97450b0389413e218268ef4a2 (git)
Affected: 571912c69f0ed731bd1e071ade9dc7ca4aa52065 , < 74a02921c48fcd35a7881956c9e5c52b86595f5d (git)
Affected: 571912c69f0ed731bd1e071ade9dc7ca4aa52065 , < 638905520fc4fae6a80991563f264131545ba3df (git)
Affected: 571912c69f0ed731bd1e071ade9dc7ca4aa52065 , < aa6c6d9ee064aabfede4402fd1283424e649ca19 (git)
Create a notification for this product.
Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()\n\nbareudp_fill_metadata_dst() passes bareudp-\u003esock to\nudp_tunnel6_dst_lookup() in the IPv6 path without a NULL check.\nThe socket is only created in bareudp_open() and NULLed in\nbareudp_stop(), so calling this function while the device is down\ntriggers a NULL dereference via sock-\u003esk.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000018\n RIP: 0010:udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:160)\n Call Trace:\n  \u003cTASK\u003e\n  bareudp_fill_metadata_dst (drivers/net/bareudp.c:532)\n  do_execute_actions (net/openvswitch/actions.c:901)\n  ovs_execute_actions (net/openvswitch/actions.c:1589)\n  ovs_packet_cmd_execute (net/openvswitch/datapath.c:700)\n  genl_family_rcv_msg_doit (net/netlink/genetlink.c:1114)\n  genl_rcv_msg (net/netlink/genetlink.c:1209)\n  netlink_rcv_skb (net/netlink/af_netlink.c:2550)\n  \u003c/TASK\u003e\n\nAdd a NULL check returning -ESHUTDOWN, consistent with the xmit paths\nin the same driver."
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    "cveId": "CVE-2026-45846",
    "datePublished": "2026-05-27T09:24:52.122Z",
    "dateReserved": "2026-05-13T15:03:33.078Z",
    "dateUpdated": "2026-06-14T17:46:30.495Z",
    "state": "PUBLISHED"
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  }
}


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  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.