{"cve":"CVE-2024-36902","nvd":{"published":"2024-05-30T16:15:13.770","modified":"2026-10-15T01:18:23.923","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fib6_rules: avoid possible NULL dereference in fib6_rule_action()\n\nsyzbot is able to trigger the following crash [1],\ncaused by unsafe ip6_dst_idev() use.\n\nIndeed ip6_dst_idev() can return NULL, and must always be checked.\n\n[1]\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: 0 PID: 31648 Comm: syz-executor.0 Not tainted 6.9.0-rc4-next-20240417-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\n RIP: 0010:__fib6_rule_action net/ipv6/fib6_rules.c:237 [inline]\n RIP: 0010:fib6_rule_action+0x241/0x7b0 net/ipv6/fib6_rules.c:267\nCode: 02 00 00 49 8d 9f d8 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 f9 32 bf f7 48 8b 1b 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 e0 32 bf f7 4c 8b 03 48 89 ef 4c\nRSP: 0018:ffffc9000fc1f2f0 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: 1a772f98c8186700\nRDX: 0000000000000003 RSI: ffffffff8bcac4e0 RDI: ffffffff8c1f9760\nRBP: ffff8880673fb980 R08: ffffffff8fac15ef R09: 1ffffffff1f582bd\nR10: dffffc0000000000 R11: fffffbfff1f582be R12: dffffc0000000000\nR13: 0000000000000080 R14: ffff888076509000 R15: ffff88807a029a00\nFS:  00007f55e82ca6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000001b31d23000 CR3: 0000000022b66000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n  fib_rules_lookup+0x62c/0xdb0 net/core/fib_rules.c:317\n  fib6_rule_lookup+0x1fd/0x790 net/ipv6/fib6_rules.c:108\n  ip6_route_output_flags_noref net/ipv6/route.c:2637 [inline]\n  ip6_route_output_flags+0x38e/0x610 net/ipv6/route.c:2649\n  ip6_route_output include/net/ip6_route.h:93 [inline]\n  ip6_dst_lookup_tail+0x189/0x11a0 net/ipv6/ip6_output.c:1120\n  ip6_dst_lookup_flow+0xb9/0x180 net/ipv6/ip6_output.c:1250\n  sctp_v6_get_dst+0x792/0x1e20 net/sctp/ipv6.c:326\n  sctp_transport_route+0x12c/0x2e0 net/sctp/transport.c:455\n  sctp_assoc_add_peer+0x614/0x15c0 net/sctp/associola.c:662\n  sctp_connect_new_asoc+0x31d/0x6c0 net/sctp/socket.c:1099\n  __sctp_connect+0x66d/0xe30 net/sctp/socket.c:1197\n  sctp_connect net/sctp/socket.c:4819 [inline]\n  sctp_inet_connect+0x149/0x1f0 net/sctp/socket.c:4834\n  __sys_connect_file net/socket.c:2048 [inline]\n  __sys_connect+0x2df/0x310 net/socket.c:2065\n  __do_sys_connect net/socket.c:2075 [inline]\n  __se_sys_connect net/socket.c:2072 [inline]\n  __x64_sys_connect+0x7a/0x90 net/socket.c:2072\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xf5/0x240 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/1876881c9a49613b5249fb400cbf53412d90cb09","https://git.kernel.org/stable/c/35297fc68de36826087e976f86a5b1f94fd0bf95","https://git.kernel.org/stable/c/4a5a573387da6a6b23a4cc62147453ff1bc32afa","https://git.kernel.org/stable/c/674c951ab8a23f7aff9b4c3f2f865901bc76a290","https://git.kernel.org/stable/c/7e3242c139c38e60844638e394c2877b16b396b0"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:51:20.603330631+00:00"},"epss":{"cve":"CVE-2024-36902","score":0.00287,"percentile":0.21046,"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."]}