{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-22056",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-22056"
  ],
  "published": "2025-04-16T14:14:59Z",
  "summary": "netfilter: nft_tunnel: fix geneve_opt type confusion addition",
  "details": "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]  <TASK>\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 <5b> 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.",
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