ghsa-7mx5-64fm-676w
Vulnerability from github
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]
Fix this bug with correct pointer addition and conversion in parse and dump code.
{
"affected": [],
"aliases": [
"CVE-2025-22056"
],
"database_specific": {
"cwe_ids": [
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-16T15:15:59Z",
"severity": "HIGH"
},
"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] \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.",
"id": "GHSA-7mx5-64fm-676w",
"modified": "2025-04-29T21:31:48Z",
"published": "2025-04-16T15:34:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22056"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0a93a710d6df334b828ea064c6d39fda34f901dc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1b755d8eb1ace3870789d48fbd94f386ad6e30be"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/28d88ee1e1cc8ac2d79aeb112717b97c5c833d43"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/31d49eb436f2da61280508d7adf8c9b473b967aa"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/446d94898c560ed2f61e26ae445858a4c4830762"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/708e268acb3a446ad2a8a3d2e9bd41cc23660cd6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a263d31c8c92e5919d41af57d9479cfb66323782"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ca2adfc03cd6273f0b589fe65afc6f75e0fe116e"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.