CVE-2024-40960 (GCVE-0-2024-40960)
Vulnerability from cvelistv5
Published
2024-07-12 12:32
Modified
2026-05-12 11:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent possible NULL dereference in rt6_probe() syzbot caught a NULL dereference in rt6_probe() [1] Bail out if __in6_dev_get() returns NULL. [1] Oops: general protection fault, probably for non-canonical address 0xdffffc00000000cb: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000658-0x000000000000065f] CPU: 1 PID: 22444 Comm: syz-executor.0 Not tainted 6.10.0-rc2-syzkaller-00383-gb8481381d4e2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:rt6_probe net/ipv6/route.c:656 [inline] RIP: 0010:find_match+0x8c4/0xf50 net/ipv6/route.c:758 Code: 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 RSP: 0018:ffffc900034af070 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90004521000 RDX: 00000000000000cb RSI: ffffffff8990d0cd RDI: 000000000000065c RBP: ffffc900034af150 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000002 R12: 000000000000000a R13: 1ffff92000695e18 R14: ffff8880244a1d20 R15: 0000000000000000 FS: 00007f4844a5a6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31b27000 CR3: 000000002d42c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> rt6_nh_find_match+0xfa/0x1a0 net/ipv6/route.c:784 nexthop_for_each_fib6_nh+0x26d/0x4a0 net/ipv4/nexthop.c:1496 __find_rr_leaf+0x6e7/0xe00 net/ipv6/route.c:825 find_rr_leaf net/ipv6/route.c:853 [inline] rt6_select net/ipv6/route.c:897 [inline] fib6_table_lookup+0x57e/0xa30 net/ipv6/route.c:2195 ip6_pol_route+0x1cd/0x1150 net/ipv6/route.c:2231 pol_lookup_func include/net/ip6_fib.h:616 [inline] fib6_rule_lookup+0x386/0x720 net/ipv6/fib6_rules.c:121 ip6_route_output_flags_noref net/ipv6/route.c:2639 [inline] ip6_route_output_flags+0x1d0/0x640 net/ipv6/route.c:2651 ip6_dst_lookup_tail.constprop.0+0x961/0x1760 net/ipv6/ip6_output.c:1147 ip6_dst_lookup_flow+0x99/0x1d0 net/ipv6/ip6_output.c:1250 rawv6_sendmsg+0xdab/0x4340 net/ipv6/raw.c:898 inet_sendmsg+0x119/0x140 net/ipv4/af_inet.c:853 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_write_iter+0x4b8/0x5c0 net/socket.c:1160 new_sync_write fs/read_write.c:497 [inline] vfs_write+0x6b6/0x1140 fs/read_write.c:590 ksys_write+0x1f8/0x260 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Impacted products
Vendor Product Version
Linux Linux Version: 52e1635631b342803aecaf81a362c1464e3da2e5
Version: 52e1635631b342803aecaf81a362c1464e3da2e5
Version: 52e1635631b342803aecaf81a362c1464e3da2e5
Version: 52e1635631b342803aecaf81a362c1464e3da2e5
Version: 52e1635631b342803aecaf81a362c1464e3da2e5
Version: 52e1635631b342803aecaf81a362c1464e3da2e5
Version: 52e1635631b342803aecaf81a362c1464e3da2e5
Version: 52e1635631b342803aecaf81a362c1464e3da2e5
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          "value": "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 \u003c0f\u003e 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 \u003cTASK\u003e\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"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-40960",
    "datePublished": "2024-07-12T12:32:01.939Z",
    "dateReserved": "2024-07-12T12:17:45.594Z",
    "dateUpdated": "2026-05-12T11:55:57.590Z",
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  "dataVersion": "5.2"
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