{"id":"CVE-2024-40959","summary":"xfrm6: check ip6_dst_idev() return value in xfrm6_get_saddr()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm6: check ip6_dst_idev() return value in xfrm6_get_saddr()\n\nip6_dst_idev() can return NULL, xfrm6_get_saddr() must act accordingly.\n\nsyzbot reported:\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 1 PID: 12 Comm: kworker/u8:1 Not tainted 6.10.0-rc2-syzkaller-00383-gb8481381d4e2 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024\nWorkqueue: wg-kex-wg1 wg_packet_handshake_send_worker\n RIP: 0010:xfrm6_get_saddr+0x93/0x130 net/ipv6/xfrm6_policy.c:64\nCode: df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 97 00 00 00 4c 8b ab d8 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 \u003c80\u003e 3c 02 00 0f 85 86 00 00 00 4d 8b 6d 00 e8 ca 13 47 01 48 b8 00\nRSP: 0018:ffffc90000117378 EFLAGS: 00010246\nRAX: dffffc0000000000 RBX: ffff88807b079dc0 RCX: ffffffff89a0d6d7\nRDX: 0000000000000000 RSI: ffffffff89a0d6e9 RDI: ffff88807b079e98\nRBP: ffff88807ad73248 R08: 0000000000000007 R09: fffffffffffff000\nR10: ffff88807b079dc0 R11: 0000000000000007 R12: ffffc90000117480\nR13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\nFS:  0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f4586d00440 CR3: 0000000079042000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n  xfrm_get_saddr net/xfrm/xfrm_policy.c:2452 [inline]\n  xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:2481 [inline]\n  xfrm_tmpl_resolve+0xa26/0xf10 net/xfrm/xfrm_policy.c:2541\n  xfrm_resolve_and_create_bundle+0x140/0x2570 net/xfrm/xfrm_policy.c:2835\n  xfrm_bundle_lookup net/xfrm/xfrm_policy.c:3070 [inline]\n  xfrm_lookup_with_ifid+0x4d1/0x1e60 net/xfrm/xfrm_policy.c:3201\n  xfrm_lookup net/xfrm/xfrm_policy.c:3298 [inline]\n  xfrm_lookup_route+0x3b/0x200 net/xfrm/xfrm_policy.c:3309\n  ip6_dst_lookup_flow+0x15c/0x1d0 net/ipv6/ip6_output.c:1256\n  send6+0x611/0xd20 drivers/net/wireguard/socket.c:139\n  wg_socket_send_skb_to_peer+0xf9/0x220 drivers/net/wireguard/socket.c:178\n  wg_socket_send_buffer_to_peer+0x12b/0x190 drivers/net/wireguard/socket.c:200\n  wg_packet_send_handshake_initiation+0x227/0x360 drivers/net/wireguard/send.c:40\n  wg_packet_handshake_send_worker+0x1c/0x30 drivers/net/wireguard/send.c:51\n  process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231\n  process_scheduled_works kernel/workqueue.c:3312 [inline]\n  worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393\n  kthread+0x2c1/0x3a0 kernel/kthread.c:389\n  ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147\n  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244","modified":"2026-04-02T12:17:22.085352Z","published":"2024-07-12T12:32:01.149Z","related":["ALSA-2024:7000","ALSA-2024:7001","ALSA-2024:8162","SUSE-SU-2024:2892-1","SUSE-SU-2024:2894-1","SUSE-SU-2024:2901-1","SUSE-SU-2024:2939-1","SUSE-SU-2024:2940-1","SUSE-SU-2024:2947-1","SUSE-SU-2024:3194-1","SUSE-SU-2024:3195-1","SUSE-SU-2024:3383-1","SUSE-SU-2025:20044-1","SUSE-SU-2025:20047-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/40xxx/CVE-2024-40959.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/20427b85781aca0ad072851f6907a3d4b2fed8d1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/600a62b4232ac027f788c3ca395bc2333adeaacf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/83c02fb2cc0afee5bb53cddf3f34f045f654ad6a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9f30f1f1a51d91e19f5a09236bb0b59e6a07ad08"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c71761292d4d002a8eccb57b86792c4e3b3eb3c7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/caf0bec84c62fb1cf6f7c9f0e8c857c87f8adbc3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d46401052c2d5614da8efea5788532f0401cb164"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f897d7171652fcfc76d042bfec798b010ee89e41"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/40xxx/CVE-2024-40959.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-40959"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"},{"fixed":"c71761292d4d002a8eccb57b86792c4e3b3eb3c7"},{"fixed":"caf0bec84c62fb1cf6f7c9f0e8c857c87f8adbc3"},{"fixed":"20427b85781aca0ad072851f6907a3d4b2fed8d1"},{"fixed":"9f30f1f1a51d91e19f5a09236bb0b59e6a07ad08"},{"fixed":"83c02fb2cc0afee5bb53cddf3f34f045f654ad6a"},{"fixed":"f897d7171652fcfc76d042bfec798b010ee89e41"},{"fixed":"600a62b4232ac027f788c3ca395bc2333adeaacf"},{"fixed":"d46401052c2d5614da8efea5788532f0401cb164"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-40959.json"}}],"schema_version":"1.7.5"}