UBUNTU-CVE-2025-22056
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_tunnel: fix geneve_opt type confusion addition When handling multiple NFTA_TUNNEL_KEY_OPTS_GENEVE attributes, the parsing logic should place every geneve_opt structure one by one compactly. Hence, when deciding the next geneve_opt position, the pointer addition should be in units of char *. However, the current implementation erroneously does type conversion before the addition, which will lead to heap out-of-bounds write. [ 6.989857] ================================================================== [ 6.990293] BUG: KASAN: slab-out-of-bounds in nft_tunnel_obj_init+0x977/0xa70 [ 6.990725] Write of size 124 at addr ffff888005f18974 by task poc/178 [ 6.991162] [ 6.991259] CPU: 0 PID: 178 Comm: poc-oob-write Not tainted 6.1.132 #1 [ 6.991655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 [ 6.992281] Call Trace: [ 6.992423] <TASK> [ 6.992586] dump_stack_lvl+0x44/0x5c [ 6.992801] print_report+0x184/0x4be [ 6.993790] kasan_report+0xc5/0x100 [ 6.994252] kasan_check_range+0xf3/0x1a0 [ 6.994486] memcpy+0x38/0x60 [ 6.994692] nft_tunnel_obj_init+0x977/0xa70 [ 6.995677] nft_obj_init+0x10c/0x1b0 [ 6.995891] nf_tables_newobj+0x585/0x950 [ 6.996922] nfnetlink_rcv_batch+0xdf9/0x1020 [ 6.998997] nfnetlink_rcv+0x1df/0x220 [ 6.999537] netlink_unicast+0x395/0x530 [ 7.000771] netlink_sendmsg+0x3d0/0x6d0 [ 7.001462] __sock_sendmsg+0x99/0xa0 [ 7.001707] ____sys_sendmsg+0x409/0x450 [ 7.002391] ___sys_sendmsg+0xfd/0x170 [ 7.003145] __sys_sendmsg+0xea/0x170 [ 7.004359] do_syscall_64+0x5e/0x90 [ 7.005817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 7.006127] RIP: 0033:0x7ec756d4e407 [ 7.006339] Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 faf [ 7.007364] RSP: 002b:00007ffed5d46760 EFLAGS: 00000202 ORIG_RAX: 000000000000002e [ 7.007827] RAX: ffffffffffffffda RBX: 00007ec756cc4740 RCX: 00007ec756d4e407 [ 7.008223] RDX: 0000000000000000 RSI: 00007ffed5d467f0 RDI: 0000000000000003 [ 7.008620] RBP: 00007ffed5d468a0 R08: 0000000000000000 R09: 0000000000000000 [ 7.009039] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 7.009429] R13: 00007ffed5d478b0 R14: 00007ec756ee5000 R15: 00005cbd4e655cb8 Fix this bug with correct pointer addition and conversion in parse and dump code.
02 / AFFECTED SOFTWARE
Affected packages
11 explicit affected versions
65 explicit affected versions
50 explicit affected versions
6 explicit affected versions
12 explicit affected versions
19 explicit affected versions
6 explicit affected versions
75 explicit affected versions
24 explicit affected versions
60 explicit affected versions
60 explicit affected versions
68 explicit affected versions
55 explicit affected versions
10 explicit affected versions
23 explicit affected versions
26 explicit affected versions
67 explicit affected versions
7 explicit affected versions
66 explicit affected versions
27 explicit affected versions
13 explicit affected versions
30 explicit affected versions
35 explicit affected versions
27 explicit affected versions
25 explicit affected versions
18 explicit affected versions
26 explicit affected versions
64 explicit affected versions
32 explicit affected versions
13 explicit affected versions
4 explicit affected versions
23 explicit affected versions
38 explicit affected versions
1 explicit affected versions
21 explicit affected versions
16 explicit affected versions
10 explicit affected versions
34 explicit affected versions
6 explicit affected versions
7 explicit affected versions
12 explicit affected versions
6 explicit affected versions
12 explicit affected versions
14 explicit affected versions
10 explicit affected versions
1 explicit affected versions
7 explicit affected versions
5 explicit affected versions
12 explicit affected versions
12 explicit affected versions
27 explicit affected versions
21 explicit affected versions
21 explicit affected versions
20 explicit affected versions
10 explicit affected versions
37 explicit affected versions
8 explicit affected versions
13 explicit affected versions
26 explicit affected versions
10 explicit affected versions
42 explicit affected versions
26 explicit affected versions
2 explicit affected versions
13 explicit affected versions
14 explicit affected versions
29 explicit affected versions
13 explicit affected versions
72 explicit affected versions
27 explicit affected versions
27 explicit affected versions
67 explicit affected versions
30 explicit affected versions
33 explicit affected versions
23 explicit affected versions
36 explicit affected versions
10 explicit affected versions
6 explicit affected versions
5 explicit affected versions
11 explicit affected versions
12 explicit affected versions
7 explicit affected versions
12 explicit affected versions
52 explicit affected versions
68 explicit affected versions
10 explicit affected versions
26 explicit affected versions
28 explicit affected versions
1 explicit affected versions
46 explicit affected versions
21 explicit affected versions
33 explicit affected versions
13 explicit affected versions
32 explicit affected versions
16 explicit affected versions
69 explicit affected versions
36 explicit affected versions
3 explicit affected versions
5 explicit affected versions
2 explicit affected versions
51 explicit affected versions
15 explicit affected versions
28 explicit affected versions
12 explicit affected versions
58 explicit affected versions
55 explicit affected versions
27 explicit affected versions
42 explicit affected versions
29 explicit affected versions
8 explicit affected versions
32 explicit affected versions
5 explicit affected versions
3 explicit affected versions
8 explicit affected versions
10 explicit affected versions
5 explicit affected versions
32 explicit affected versions
13 explicit affected versions
13 explicit affected versions
7 explicit affected versions
5 explicit affected versions
10 explicit affected versions
12 explicit affected versions
15 explicit affected versions
80 explicit affected versions
44 explicit affected versions
16 explicit affected versions
3 explicit affected versions
13 explicit affected versions
26 explicit affected versions
45 explicit affected versions
37 explicit affected versions
37 explicit affected versions
14 explicit affected versions
38 explicit affected versions
9 explicit affected versions
11 explicit affected versions
25 explicit affected versions
8 explicit affected versions
68 explicit affected versions
7 explicit affected versions
4 explicit affected versions
57 explicit affected versions
1 explicit affected versions
1 explicit affected versions
1 explicit affected versions
66 explicit affected versions
56 explicit affected versions
56 explicit affected versions
13 explicit affected versions
43 explicit affected versions
10 explicit affected versions
8 explicit affected versions
31 explicit affected versions
14 explicit affected versions
4 explicit affected versions
78 explicit affected versions
11 explicit affected versions
1 explicit affected versions
5 explicit affected versions
25 explicit affected versions
57 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_tunnel: fix geneve_opt type confusion addition When handling multiple NFTA_TUNNEL_KEY_OPTS_GENEVE attributes, the parsing logic should place every geneve_opt structure one by one compactly. Hence, when deciding the next geneve_opt position, the pointer addition should be in units of char *. However, the current implementation erroneously does type conversion before the addition, which will lead to heap out-of-bounds write. [ 6.989857] ================================================================== [ 6.990293] BUG: KASAN: slab-out-of-bounds in nft_tunnel_obj_init+0x977/0xa70 [ 6.990725] Write of size 124 at addr ffff888005f18974 by task poc/178 [ 6.991162] [ 6.991259] CPU: 0 PID: 178 Comm: poc-oob-write Not tainted 6.1.132 #1 [ 6.991655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 [ 6.992281] Call Trace: [ 6.992423] <TASK> [ 6.992586] dump_stack_lvl+0x44/0x5c [ 6.992801] print_report+0x184/0x4be [ 6.993790] kasan_report+0xc5/0x100 [ 6.994252] kasan_check_range+0xf3/0x1a0 [ 6.994486] memcpy+0x38/0x60 [ 6.994692] nft_tunnel_obj_init+0x977/0xa70 [ 6.995677] nft_obj_init+0x10c/0x1b0 [ 6.995891] nf_tables_newobj+0x585/0x950 [ 6.996922] nfnetlink_rcv_batch+0xdf9/0x1020 [ 6.998997] nfnetlink_rcv+0x1df/0x220 [ 6.999537] netlink_unicast+0x395/0x530 [ 7.000771] netlink_sendmsg+0x3d0/0x6d0 [ 7.001462] __sock_sendmsg+0x99/0xa0 [ 7.001707] ____sys_sendmsg+0x409/0x450 [ 7.002391] ___sys_sendmsg+0xfd/0x170 [ 7.003145] __sys_sendmsg+0xea/0x170 [ 7.004359] do_syscall_64+0x5e/0x90 [ 7.005817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 7.006127] RIP: 0033:0x7ec756d4e407 [ 7.006339] Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 faf [ 7.007364] RSP: 002b:00007ffed5d46760 EFLAGS: 00000202 ORIG_RAX: 000000000000002e [ 7.007827] RAX: ffffffffffffffda RBX: 00007ec756cc4740 RCX: 00007ec756d4e407 [ 7.008223] RDX: 0000000000000000 RSI: 00007ffed5d467f0 RDI: 0000000000000003 [ 7.008620] RBP: 00007ffed5d468a0 R08: 0000000000000000 R09: 0000000000000000 [ 7.009039] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 7.009429] R13: 00007ffed5d478b0 R14: 00007ec756ee5000 R15: 00005cbd4e655cb8 Fix this bug with correct pointer addition and conversion in parse and dump code.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/1b755d8eb1ace3870789d48fbd94f386ad6e30be
- https://git.kernel.org/stable/c/0a93a710d6df334b828ea064c6d39fda34f901dc
- https://git.kernel.org/stable/c/1b755d8eb1ace3870789d48fbd94f386ad6e30be
- https://git.kernel.org/stable/c/28d88ee1e1cc8ac2d79aeb112717b97c5c833d43
- https://git.kernel.org/stable/c/31d49eb436f2da61280508d7adf8c9b473b967aa
- https://git.kernel.org/stable/c/446d94898c560ed2f61e26ae445858a4c4830762
- https://git.kernel.org/stable/c/708e268acb3a446ad2a8a3d2e9bd41cc23660cd6
- https://git.kernel.org/stable/c/a263d31c8c92e5919d41af57d9479cfb66323782
- https://git.kernel.org/stable/c/ca2adfc03cd6273f0b589fe65afc6f75e0fe116e
- https://ubuntu.com/security/CVE-2025-22056
- https://ubuntu.com/security/notices/USN-7591-1
- https://ubuntu.com/security/notices/USN-7591-2
- https://ubuntu.com/security/notices/USN-7591-3
- https://ubuntu.com/security/notices/USN-7591-4
- https://ubuntu.com/security/notices/USN-7591-5
- https://ubuntu.com/security/notices/USN-7591-6
- https://ubuntu.com/security/notices/USN-7592-1
- https://ubuntu.com/security/notices/USN-7593-1
- https://ubuntu.com/security/notices/USN-7594-1
- https://ubuntu.com/security/notices/USN-7594-2
- https://ubuntu.com/security/notices/USN-7594-3
- https://ubuntu.com/security/notices/USN-7597-1
- https://ubuntu.com/security/notices/USN-7597-2
- https://ubuntu.com/security/notices/USN-7598-1
- https://ubuntu.com/security/notices/USN-7602-1
- https://ubuntu.com/security/notices/USN-7605-1
- https://ubuntu.com/security/notices/USN-7605-2
- https://ubuntu.com/security/notices/USN-7606-1
- https://ubuntu.com/security/notices/USN-7628-1
- https://ubuntu.com/security/notices/USN-7655-1
- https://ubuntu.com/security/notices/USN-7835-1
- https://ubuntu.com/security/notices/USN-7835-2
- https://ubuntu.com/security/notices/USN-7835-3
- https://ubuntu.com/security/notices/USN-7835-4
- https://ubuntu.com/security/notices/USN-7835-5
- https://ubuntu.com/security/notices/USN-7835-6
- https://ubuntu.com/security/notices/USN-7887-1
- https://ubuntu.com/security/notices/USN-7887-2
- https://ubuntu.com/security/notices/USN-7940-1
- https://ubuntu.com/security/notices/USN-7940-2
- https://www.cve.org/CVERecord?id=CVE-2025-22056