Answer in brief
CVE-2024-26663 records a High severity (CVSS 7.8) vulnerability in tipc: Check the bearer type before calling tipc_udp_nl_bearer_add(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ef20cd4dd1633987bcf46ac34ace2c8af212361f <24ec8f0da93b8a9fba11600be8a90f0d73fb46f1 || >=ef20cd4dd1633987bcf46ac34ace2c8af212361f <6f70f0b412458c622a12d4292782c8e92e210c2f || >=ef20cd4dd1633987bcf46ac34ace2c8af212361f <19d7314f2fb9515bdaac9829d4d8eb34edd1fe95 || >=ef20cd4dd1633987bcf46ac34ace2c8af212361f <c1701ea85ef0ec7be6a1b36c7da69f572ed2fd12 || >=ef20cd4dd1633987bcf46ac34ace2c8af212361f <3d3a5b31b43515b5752ff282702ca546ec3e48b6 || >=ef20cd4dd1633987bcf46ac34ace2c8af212361f <888e3524be87f3df9fa3c083484e4b62b3e3bb59 || >=ef20cd4dd1633987bcf46ac34ace2c8af212361f <0cd331dfd6023640c9669d0592bc0fd491205f87 || >=ef20cd4dd1633987bcf46ac34ace2c8af212361f <3871aa01e1a779d866fa9dfdd5a836f342f4eb87 | 24ec8f0da93b8a9fba11600be8a90f0d73fb46f1, 6f70f0b412458c622a12d4292782c8e92e210c2f, 19d7314f2fb9515bdaac9829d4d8eb34edd1fe95, c1701ea85ef0ec7be6a1b36c7da69f572ed2fd12, 3d3a5b31b43515b5752ff282702ca546ec3e48b6, 888e3524be87f3df9fa3c083484e4b62b3e3bb59, 0cd331dfd6023640c9669d0592bc0fd491205f87, 3871aa01e1a779d866fa9dfdd5a836f342f4eb87 |
| Linux/Linuxgeneric | 4.9 | Not reported |
Published upstream
Apr 2, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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: <TASK> 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().
Quoted source text, attributed separately from HOL analysis.