{"cve":"CVE-2024-40960","nvd":{"published":"2024-07-12T13:15:18.040","modified":"2026-10-15T01:18:38.903","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: prevent possible NULL dereference in rt6_probe()\n\nsyzbot caught a NULL dereference in rt6_probe() [1]\n\nBail out if  __in6_dev_get() returns NULL.\n\n[1]\nOops: general protection fault, probably for non-canonical address 0xdffffc00000000cb: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000658-0x000000000000065f]\nCPU: 1 PID: 22444 Comm: syz-executor.0 Not tainted 6.10.0-rc2-syzkaller-00383-gb8481381d4e2 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024\n RIP: 0010:rt6_probe net/ipv6/route.c:656 [inline]\n RIP: 0010:find_match+0x8c4/0xf50 net/ipv6/route.c:758\nCode: 14 fd f7 48 8b 85 38 ff ff ff 48 c7 45 b0 00 00 00 00 48 8d b8 5c 06 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 19\nRSP: 0018:ffffc900034af070 EFLAGS: 00010203\nRAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90004521000\nRDX: 00000000000000cb RSI: ffffffff8990d0cd RDI: 000000000000065c\nRBP: ffffc900034af150 R08: 0000000000000005 R09: 0000000000000000\nR10: 0000000000000001 R11: 0000000000000002 R12: 000000000000000a\nR13: 1ffff92000695e18 R14: ffff8880244a1d20 R15: 0000000000000000\nFS:  00007f4844a5a6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000001b31b27000 CR3: 000000002d42c000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n  rt6_nh_find_match+0xfa/0x1a0 net/ipv6/route.c:784\n  nexthop_for_each_fib6_nh+0x26d/0x4a0 net/ipv4/nexthop.c:1496\n  __find_rr_leaf+0x6e7/0xe00 net/ipv6/route.c:825\n  find_rr_leaf net/ipv6/route.c:853 [inline]\n  rt6_select net/ipv6/route.c:897 [inline]\n  fib6_table_lookup+0x57e/0xa30 net/ipv6/route.c:2195\n  ip6_pol_route+0x1cd/0x1150 net/ipv6/route.c:2231\n  pol_lookup_func include/net/ip6_fib.h:616 [inline]\n  fib6_rule_lookup+0x386/0x720 net/ipv6/fib6_rules.c:121\n  ip6_route_output_flags_noref net/ipv6/route.c:2639 [inline]\n  ip6_route_output_flags+0x1d0/0x640 net/ipv6/route.c:2651\n  ip6_dst_lookup_tail.constprop.0+0x961/0x1760 net/ipv6/ip6_output.c:1147\n  ip6_dst_lookup_flow+0x99/0x1d0 net/ipv6/ip6_output.c:1250\n  rawv6_sendmsg+0xdab/0x4340 net/ipv6/raw.c:898\n  inet_sendmsg+0x119/0x140 net/ipv4/af_inet.c:853\n  sock_sendmsg_nosec net/socket.c:730 [inline]\n  __sock_sendmsg net/socket.c:745 [inline]\n  sock_write_iter+0x4b8/0x5c0 net/socket.c:1160\n  new_sync_write fs/read_write.c:497 [inline]\n  vfs_write+0x6b6/0x1140 fs/read_write.c:590\n  ksys_write+0x1f8/0x260 fs/read_write.c:643\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/1ed9849fdf9a1a617129346b11d2094ca26828dc","https://git.kernel.org/stable/c/51ee2f7c30790799d0ec30c0ce0c743e58f046f2","https://git.kernel.org/stable/c/569c9d9ea6648d099187527b93982f406ddcebc0","https://git.kernel.org/stable/c/6eed6d3cd19ff3cfa83aeceed86da14abaf7417b","https://git.kernel.org/stable/c/73e7c8ca6ad76f29b2c99c20845a6f3b203ff0c6"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:52:42.518321223+00:00"},"epss":{"cve":"CVE-2024-40960","score":0.0027,"percentile":0.1902,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}