--- id: CVE-2024-40960 title: |- 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: gener… 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: gener… severity: medium cvss: 5.5 cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H' cwe: - CWE-476 vendor: linux product: linux_kernel affected: - 'linux_kernel >= 2.6.17, < 4.19.317' - 'linux_kernel >= 4.20, < 5.4.279' - 'linux_kernel >= 5.5, < 5.10.221' - 'linux_kernel >= 5.11, < 5.15.162' - 'linux_kernel >= 5.16, < 6.1.96' - 'linux_kernel >= 6.2, < 6.6.36' - 'linux_kernel >= 6.7, < 6.9.7' - linux_kernel = 6.10 patched: - linux_kernel 6.9.7 published: '2024-07-12' updated: '2026-10-15' sourceUpdated: '2026-10-15T01:18:38.903' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-40960' references: - url: 'https://git.kernel.org/stable/c/1ed9849fdf9a1a617129346b11d2094ca26828dc' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/51ee2f7c30790799d0ec30c0ce0c743e58f046f2' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/569c9d9ea6648d099187527b93982f406ddcebc0' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/6eed6d3cd19ff3cfa83aeceed86da14abaf7417b' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/73e7c8ca6ad76f29b2c99c20845a6f3b203ff0c6' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/b86762dbe19a62e785c189f313cda5b989931f37' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/d66fc4826127c82f99c4033380f8e93833d331c7' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/f0cda984e4e634b221dbf9642b8ecc5b4806b41e' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/1ed9849fdf9a1a617129346b11d2094ca26828dc' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/51ee2f7c30790799d0ec30c0ce0c743e58f046f2' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/569c9d9ea6648d099187527b93982f406ddcebc0' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/6eed6d3cd19ff3cfa83aeceed86da14abaf7417b' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/73e7c8ca6ad76f29b2c99c20845a6f3b203ff0c6' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/b86762dbe19a62e785c189f313cda5b989931f37' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/d66fc4826127c82f99c4033380f8e93833d331c7' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/f0cda984e4e634b221dbf9642b8ecc5b4806b41e' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e - url: 'https://cert-portal.siemens.com/productcert/html/ssa-355557.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e - url: 'https://cert-portal.siemens.com/productcert/html/ssa-613116.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e tags: - nvd - cve.org epss: 0.0027 epssPercentile: 0.19097 ingestedAt: '2026-10-15T03:30:12.722Z' ssvc: exploitation: none automatable: 'no' technicalImpact: partial timestamp: '2024-09-10T17:03:29.403653Z' --- ## Overview 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: 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 ## Affected - `linux_kernel >= 2.6.17, < 4.19.317` - `linux_kernel >= 4.20, < 5.4.279` - `linux_kernel >= 5.5, < 5.10.221` - `linux_kernel >= 5.11, < 5.15.162` - `linux_kernel >= 5.16, < 6.1.96` - `linux_kernel >= 6.2, < 6.6.36` - `linux_kernel >= 6.7, < 6.9.7` - `linux_kernel = 6.10` ## Remediation Upgrade past the affected range: - `linux_kernel 6.9.7`