{"id":"CVE-2026-45846","state":"PUBLISHED","title":"bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()","description":"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->sock 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->sk.\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  <TASK>\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  </TASK>\n\nAdd a NULL check returning -ESHUTDOWN, consistent with the xmit paths\nin the same driver.","publishedAt":"2026-05-27T09:24:52.122Z","updatedAt":"2026-06-14T17:46:30.495Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"31e010a106ff6cd8ccac4bfee547fd3fa1015574","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"55193df8d6d33318435f19572bf5ea47a22eee28","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"51eef9c072aa3405a6823a96ae666d38a3b48750","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"a0f4e4e8e0f5e24ddd83e3d1221732621cf34636","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"35a115a204be08f97450b0389413e218268ef4a2","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"74a02921c48fcd35a7881956c9e5c52b86595f5d","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"638905520fc4fae6a80991563f264131545ba3df","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"aa6c6d9ee064aabfede4402fd1283424e649ca19","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/bareudp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/bareudp.c"]}],"references":["https://git.kernel.org/stable/c/31e010a106ff6cd8ccac4bfee547fd3fa1015574","https://git.kernel.org/stable/c/55193df8d6d33318435f19572bf5ea47a22eee28","https://git.kernel.org/stable/c/51eef9c072aa3405a6823a96ae666d38a3b48750","https://git.kernel.org/stable/c/a0f4e4e8e0f5e24ddd83e3d1221732621cf34636","https://git.kernel.org/stable/c/35a115a204be08f97450b0389413e218268ef4a2","https://git.kernel.org/stable/c/74a02921c48fcd35a7881956c9e5c52b86595f5d","https://git.kernel.org/stable/c/638905520fc4fae6a80991563f264131545ba3df","https://git.kernel.org/stable/c/aa6c6d9ee064aabfede4402fd1283424e649ca19"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45846.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45846","state":"PUBLISHED","datePublished":"2026-05-27T09:24:52.122Z","dateUpdated":"2026-06-14T17:46:30.495Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.078Z"},"containers":{"cna":{"title":"bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst()","descriptions":[{"lang":"en","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->sock 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->sk.\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  <TASK>\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  </TASK>\n\nAdd a NULL check returning -ESHUTDOWN, consistent with the xmit paths\nin the same driver."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"31e010a106ff6cd8ccac4bfee547fd3fa1015574","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"55193df8d6d33318435f19572bf5ea47a22eee28","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"51eef9c072aa3405a6823a96ae666d38a3b48750","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"a0f4e4e8e0f5e24ddd83e3d1221732621cf34636","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"35a115a204be08f97450b0389413e218268ef4a2","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"74a02921c48fcd35a7881956c9e5c52b86595f5d","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"638905520fc4fae6a80991563f264131545ba3df","versionType":"git"},{"version":"571912c69f0ed731bd1e071ade9dc7ca4aa52065","status":"affected","lessThan":"aa6c6d9ee064aabfede4402fd1283424e649ca19","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/bareudp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.7","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/bareudp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/31e010a106ff6cd8ccac4bfee547fd3fa1015574"},{"url":"https://git.kernel.org/stable/c/55193df8d6d33318435f19572bf5ea47a22eee28"},{"url":"https://git.kernel.org/stable/c/51eef9c072aa3405a6823a96ae666d38a3b48750"},{"url":"https://git.kernel.org/stable/c/a0f4e4e8e0f5e24ddd83e3d1221732621cf34636"},{"url":"https://git.kernel.org/stable/c/35a115a204be08f97450b0389413e218268ef4a2"},{"url":"https://git.kernel.org/stable/c/74a02921c48fcd35a7881956c9e5c52b86595f5d"},{"url":"https://git.kernel.org/stable/c/638905520fc4fae6a80991563f264131545ba3df"},{"url":"https://git.kernel.org/stable/c/aa6c6d9ee064aabfede4402fd1283424e649ca19"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:46:30.495Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}