CVE-2025-22056 (GCVE-0-2025-22056)
Vulnerability from cvelistv5
Published
2025-04-16 14:12
Modified
2026-05-11 21:11
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 925d844696d9287f841d6b3e0ed62a35fb175970
Version: 925d844696d9287f841d6b3e0ed62a35fb175970
Version: 925d844696d9287f841d6b3e0ed62a35fb175970
Version: 925d844696d9287f841d6b3e0ed62a35fb175970
Version: 925d844696d9287f841d6b3e0ed62a35fb175970
Version: 925d844696d9287f841d6b3e0ed62a35fb175970
Version: 925d844696d9287f841d6b3e0ed62a35fb175970
Version: 925d844696d9287f841d6b3e0ed62a35fb175970
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_tunnel: fix geneve_opt type confusion addition\n\nWhen handling multiple NFTA_TUNNEL_KEY_OPTS_GENEVE attributes, the\nparsing logic should place every geneve_opt structure one by one\ncompactly. Hence, when deciding the next geneve_opt position, the\npointer addition should be in units of char *.\n\nHowever, the current implementation erroneously does type conversion\nbefore the addition, which will lead to heap out-of-bounds write.\n\n[    6.989857] ==================================================================\n[    6.990293] BUG: KASAN: slab-out-of-bounds in nft_tunnel_obj_init+0x977/0xa70\n[    6.990725] Write of size 124 at addr ffff888005f18974 by task poc/178\n[    6.991162]\n[    6.991259] CPU: 0 PID: 178 Comm: poc-oob-write Not tainted 6.1.132 #1\n[    6.991655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\n[    6.992281] Call Trace:\n[    6.992423]  \u003cTASK\u003e\n[    6.992586]  dump_stack_lvl+0x44/0x5c\n[    6.992801]  print_report+0x184/0x4be\n[    6.993790]  kasan_report+0xc5/0x100\n[    6.994252]  kasan_check_range+0xf3/0x1a0\n[    6.994486]  memcpy+0x38/0x60\n[    6.994692]  nft_tunnel_obj_init+0x977/0xa70\n[    6.995677]  nft_obj_init+0x10c/0x1b0\n[    6.995891]  nf_tables_newobj+0x585/0x950\n[    6.996922]  nfnetlink_rcv_batch+0xdf9/0x1020\n[    6.998997]  nfnetlink_rcv+0x1df/0x220\n[    6.999537]  netlink_unicast+0x395/0x530\n[    7.000771]  netlink_sendmsg+0x3d0/0x6d0\n[    7.001462]  __sock_sendmsg+0x99/0xa0\n[    7.001707]  ____sys_sendmsg+0x409/0x450\n[    7.002391]  ___sys_sendmsg+0xfd/0x170\n[    7.003145]  __sys_sendmsg+0xea/0x170\n[    7.004359]  do_syscall_64+0x5e/0x90\n[    7.005817]  entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n[    7.006127] RIP: 0033:0x7ec756d4e407\n[    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 \u003c5b\u003e c3 0f 1f 80 00 00 00 00 83 e2 39 83 faf\n[    7.007364] RSP: 002b:00007ffed5d46760 EFLAGS: 00000202 ORIG_RAX: 000000000000002e\n[    7.007827] RAX: ffffffffffffffda RBX: 00007ec756cc4740 RCX: 00007ec756d4e407\n[    7.008223] RDX: 0000000000000000 RSI: 00007ffed5d467f0 RDI: 0000000000000003\n[    7.008620] RBP: 00007ffed5d468a0 R08: 0000000000000000 R09: 0000000000000000\n[    7.009039] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000\n[    7.009429] R13: 00007ffed5d478b0 R14: 00007ec756ee5000 R15: 00005cbd4e655cb8\n\nFix this bug with correct pointer addition and conversion in parse\nand dump code."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:11:47.291Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/31d49eb436f2da61280508d7adf8c9b473b967aa"
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        {
          "url": "https://git.kernel.org/stable/c/ca2adfc03cd6273f0b589fe65afc6f75e0fe116e"
        },
        {
          "url": "https://git.kernel.org/stable/c/a263d31c8c92e5919d41af57d9479cfb66323782"
        },
        {
          "url": "https://git.kernel.org/stable/c/28d88ee1e1cc8ac2d79aeb112717b97c5c833d43"
        },
        {
          "url": "https://git.kernel.org/stable/c/0a93a710d6df334b828ea064c6d39fda34f901dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/446d94898c560ed2f61e26ae445858a4c4830762"
        },
        {
          "url": "https://git.kernel.org/stable/c/708e268acb3a446ad2a8a3d2e9bd41cc23660cd6"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b755d8eb1ace3870789d48fbd94f386ad6e30be"
        }
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      "title": "netfilter: nft_tunnel: fix geneve_opt type confusion addition",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-22056",
    "datePublished": "2025-04-16T14:12:13.440Z",
    "dateReserved": "2024-12-29T08:45:45.812Z",
    "dateUpdated": "2026-05-11T21:11:47.291Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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