{
  "threat_severity" : "Moderate",
  "public_date" : "2024-05-30T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: ipv6: fib6_rules: avoid possible NULL dereference in fib6_rule_action()",
    "id" : "2284545",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2284545"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-476",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nipv6: fib6_rules: avoid possible NULL dereference in fib6_rule_action()\nsyzbot is able to trigger the following crash [1],\ncaused by unsafe ip6_dst_idev() use.\nIndeed ip6_dst_idev() can return NULL, and must always be checked.\n[1]\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\nRIP: 0010:__fib6_rule_action net/ipv6/fib6_rules.c:237 [inline]\nRIP: 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>\nfib_rules_lookup+0x62c/0xdb0 net/core/fib_rules.c:317\nfib6_rule_lookup+0x1fd/0x790 net/ipv6/fib6_rules.c:108\nip6_route_output_flags_noref net/ipv6/route.c:2637 [inline]\nip6_route_output_flags+0x38e/0x610 net/ipv6/route.c:2649\nip6_route_output include/net/ip6_route.h:93 [inline]\nip6_dst_lookup_tail+0x189/0x11a0 net/ipv6/ip6_output.c:1120\nip6_dst_lookup_flow+0xb9/0x180 net/ipv6/ip6_output.c:1250\nsctp_v6_get_dst+0x792/0x1e20 net/sctp/ipv6.c:326\nsctp_transport_route+0x12c/0x2e0 net/sctp/transport.c:455\nsctp_assoc_add_peer+0x614/0x15c0 net/sctp/associola.c:662\nsctp_connect_new_asoc+0x31d/0x6c0 net/sctp/socket.c:1099\n__sctp_connect+0x66d/0xe30 net/sctp/socket.c:1197\nsctp_connect net/sctp/socket.c:4819 [inline]\nsctp_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\ndo_syscall_x64 arch/x86/entry/common.c:52 [inline]\ndo_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\nentry_SYSCALL_64_after_hwframe+0x77/0x7f" ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-09-24T00:00:00Z",
    "advisory" : "RHSA-2024:7001",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-09-24T00:00:00Z",
    "advisory" : "RHSA-2024:7000",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.22.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-11-12T00:00:00Z",
    "advisory" : "RHSA-2024:9315",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.11.1.el9_5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-11-12T00:00:00Z",
    "advisory" : "RHSA-2024:9315",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.11.1.el9_5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.4 Extended Update Support",
    "release_date" : "2025-04-16T00:00:00Z",
    "advisory" : "RHSA-2025:3935",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.4",
    "package" : "kernel-0:5.14.0-427.65.1.el9_4"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Will not fix",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2024-36902\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-36902" ],
  "name" : "CVE-2024-36902",
  "csaw" : false
}