{"id":"DEBIAN-CVE-2024-26663","details":"In the Linux kernel, the following vulnerability has been resolved:  tipc: Check the bearer type before calling tipc_udp_nl_bearer_add()  syzbot reported the following general protection fault [1]:  general protection fault, probably for non-canonical address 0xdffffc0000000010: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000080-0x0000000000000087] ... RIP: 0010:tipc_udp_is_known_peer+0x9c/0x250 net/tipc/udp_media.c:291 ... Call Trace:  \u003cTASK\u003e  tipc_udp_nl_bearer_add+0x212/0x2f0 net/tipc/udp_media.c:646  tipc_nl_bearer_add+0x21e/0x360 net/tipc/bearer.c:1089  genl_family_rcv_msg_doit+0x1fc/0x2e0 net/netlink/genetlink.c:972  genl_family_rcv_msg net/netlink/genetlink.c:1052 [inline]  genl_rcv_msg+0x561/0x800 net/netlink/genetlink.c:1067  netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2544  genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076  netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]  netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1367  netlink_sendmsg+0x8b7/0xd70 net/netlink/af_netlink.c:1909  sock_sendmsg_nosec net/socket.c:730 [inline]  __sock_sendmsg+0xd5/0x180 net/socket.c:745  ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584  ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638  __sys_sendmsg+0x117/0x1e0 net/socket.c:2667  do_syscall_x64 arch/x86/entry/common.c:52 [inline]  do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83  entry_SYSCALL_64_after_hwframe+0x63/0x6b  The cause of this issue is that when tipc_nl_bearer_add() is called with the TIPC_NLA_BEARER_UDP_OPTS attribute, tipc_udp_nl_bearer_add() is called even if the bearer is not UDP.  tipc_udp_is_known_peer() called by tipc_udp_nl_bearer_add() assumes that the media_ptr field of the tipc_bearer has an udp_bearer type object, so the function goes crazy for non-UDP bearers.  This patch fixes the issue by checking the bearer type before calling tipc_udp_nl_bearer_add() in tipc_nl_bearer_add().","modified":"2026-09-15T09:03:05.037672291Z","published":"2024-04-02T07:15:43.287Z","upstream":["CVE-2024-26663"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-26663"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.82-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26663.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.7.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26663.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.7.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-26663.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}