5.5

CVE-2026-45846

bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.7 < 5.10.258
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.209
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.175
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.141
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.91
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.33
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.10
Linux ≫ Linux Kernel Version7.1 Updaterc1
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.018
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/a0f4e4e8e0f5e24ddd83e3d1221732621cf34636
Patch
https://git.kernel.org/stable/c/35a115a204be08f97450b0389413e218268ef4a2
Patch
https://git.kernel.org/stable/c/74a02921c48fcd35a7881956c9e5c52b86595f5d
Patch
https://git.kernel.org/stable/c/638905520fc4fae6a80991563f264131545ba3df
Patch
https://git.kernel.org/stable/c/aa6c6d9ee064aabfede4402fd1283424e649ca19
Patch
https://git.kernel.org/stable/c/31e010a106ff6cd8ccac4bfee547fd3fa1015574
Patch
https://git.kernel.org/stable/c/51eef9c072aa3405a6823a96ae666d38a3b48750
Patch
https://git.kernel.org/stable/c/55193df8d6d33318435f19572bf5ea47a22eee28
Patch