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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2025-22056

netfilter: nft_tunnel: fix geneve_opt type confusion addition

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 925d844696d9287f841d6b3e0ed62a35fb175970 to < 31d49eb436f2da61280508d7adf8c9b473b967aaaffected
  • 925d844696d9287f841d6b3e0ed62a35fb175970 to < ca2adfc03cd6273f0b589fe65afc6f75e0fe116eaffected
  • 925d844696d9287f841d6b3e0ed62a35fb175970 to < a263d31c8c92e5919d41af57d9479cfb66323782affected
  • 925d844696d9287f841d6b3e0ed62a35fb175970 to < 28d88ee1e1cc8ac2d79aeb112717b97c5c833d43affected
  • 925d844696d9287f841d6b3e0ed62a35fb175970 to < 0a93a710d6df334b828ea064c6d39fda34f901dcaffected
  • 925d844696d9287f841d6b3e0ed62a35fb175970 to < 446d94898c560ed2f61e26ae445858a4c4830762affected
  • 925d844696d9287f841d6b3e0ed62a35fb175970 to < 708e268acb3a446ad2a8a3d2e9bd41cc23660cd6affected
  • 925d844696d9287f841d6b3e0ed62a35fb175970 to < 1b755d8eb1ace3870789d48fbd94f386ad6e30beaffected

Linux Linux

Default version status: affected

  • 5.7affected
  • 0 to < 5.7unaffected
  • 5.10.236 to ≤ 5.10.*unaffected
  • 5.15.180 to ≤ 5.15.*unaffected
  • 6.1.134 to ≤ 6.1.*unaffected
  • 6.6.87 to ≤ 6.6.*unaffected
  • 6.12.23 to ≤ 6.12.*unaffected
  • 6.13.11 to ≤ 6.13.*unaffected
  • 6.14.2 to ≤ 6.14.*unaffected
  • 6.15 to ≤ *unaffected

References