CVE-2025-22056

HIGH EPSS 15.1%
Published Apr 16, 20251y ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Apr 16, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
15.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel*≥5.7  –  <5.10.236
linuxlinux_kernel*≥5.11  –  <5.15.180
linuxlinux_kernel*≥5.16  –  <6.1.134
linuxlinux_kernel*≥6.2  –  <6.6.87
linuxlinux_kernel*≥6.7  –  <6.12.23
linuxlinux_kernel*≥6.13  –  <6.13.11
linuxlinux_kernel*≥6.14  –  <6.14.2

References 10

  • git.kernel.org https://git.kernel.org/stable/c/0a93a710d6df334b828ea064c6d39fda34f901dc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1b755d8eb1ace3870789d48fbd94f386ad6e30be
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/28d88ee1e1cc8ac2d79aeb112717b97c5c833d43
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/31d49eb436f2da61280508d7adf8c9b473b967aa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/446d94898c560ed2f61e26ae445858a4c4830762
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/708e268acb3a446ad2a8a3d2e9bd41cc23660cd6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a263d31c8c92e5919d41af57d9479cfb66323782
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ca2adfc03cd6273f0b589fe65afc6f75e0fe116e
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0a93a710d6df334b828ea064c6d39fda34f901dc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1b755d8eb1ace3870789d48fbd94f386ad6e30be
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/28d88ee1e1cc8ac2d79aeb112717b97c5c833d43
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/31d49eb436f2da61280508d7adf8c9b473b967aa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/446d94898c560ed2f61e26ae445858a4c4830762
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/708e268acb3a446ad2a8a3d2e9bd41cc23660cd6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a263d31c8c92e5919d41af57d9479cfb66323782
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ca2adfc03cd6273f0b589fe65afc6f75e0fe116e
    Patch