GHSA-MPG4-7MW3-CCVQ
Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_nat: avoid invalid nat_net pointer use on failed nf_nat_init()
We ran into below KASAN splat, which is mostly uninteresting, beside for having nf_nat_register_fn() in the call chain as a cause for the offending access:
================================================================== BUG: KASAN: slab-out-of-bounds in nf_nat_register_fn+0x5f9/0x640 Read of size 8 at addr ffff890031e54c20 by task iptables/9510
CPU: 0 UID: 0 PID: 9510 Comm: iptables Not tainted 6.18.18-grsec-full-20260320181326 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: […] dump_stack_lvl+0xee/0x160 ffff88004117eeb8 […] print_report+0x6e/0x640 ffff88004117eee0 […] ? __phys_addr+0x8e/0x140 ffff88004117eef0 […] ? kasan_addr_to_slab+0x51/0xe0 ffff88004117ef08 […] ? complete_report_info+0xec/0x1c0 ffff88004117ef20 […] ? nf_nat_register_fn+0x5f9/0x640 ffff88004117ef48 […] kasan_report+0xbc/0x140 ffff88004117ef50 […] ? nf_nat_register_fn+0x5f9/0x640 ffff88004117ef90 […] nf_nat_register_fn+0x5f9/0x640 ffff88004117eff8 […] ? nf_nat_icmp_reply_translation+0x6e0/0x6e0 ffff88004117f070 […] nf_tables_register_hook.part.0+0xa0/0x220 ffff88004117f080 […] nf_tables_addchain.constprop.0+0x1054/0x1fc0 ffff88004117f0b8 […] ? nft_chain_lookup.part.0+0x4ce/0xac0 ffff88004117f130 […] ? nf_tables_abort+0x3d80/0x3d80 ffff88004117f190 […] ? nf_tables_dumpreset_obj+0x100/0x100 ffff88004117f1c8 […] ? nft_table_lookup.part.0+0x255/0x300 ffff88004117f310 […] ? nf_tables_newchain+0x21a4/0x2fa0 ffff88004117f358 […] nf_tables_newchain+0x21a4/0x2fa0 ffff88004117f360 […] ? nf_tables_addchain.constprop.0+0x1fc0/0x1fc0 ffff88004117f458 […] ? nla_get_range_signed+0x4a0/0x4a0 ffff88004117f488 […] ? lock_acquire+0x16f/0x320 ffff88004117f490 […] ? find_held_lock+0x3b/0xe0 ffff88004117f4b0 […] ? __nla_parse+0x45/0x80 ffff88004117f500 […] nfnetlink_rcv_batch+0xbca/0x19a0 ffff88004117f550 […] ? nfnetlink_net_exit_batch+0x120/0x120 ffff88004117f618 […] ? __sanitizer_cov_trace_switch+0x63/0xe0 ffff88004117f720 […] ? gr_acl_handle_mmap+0x1c4/0x320 ffff88004117f7c0 […] ? nla_get_range_signed+0x4a0/0x4a0 ffff88004117f7e8 […] ? gr_is_capable+0x6f/0xe0 ffff88004117f830 […] ? __nla_parse+0x45/0x80 ffff88004117f860 […] ? skb_pull+0x103/0x1a0 ffff88004117f880 […] nfnetlink_rcv+0x3db/0x4a0 ffff88004117f8b0 […] ? nfnetlink_rcv_batch+0x19a0/0x19a0 ffff88004117f8d8 […] ? netlink_lookup+0xe2/0x240 ffff88004117f900 […] netlink_unicast+0x74b/0xb00 ffff88004117f930 […] ? netlink_attachskb+0xb20/0xb20 ffff88004117f980 […] ? __check_object_size+0x3e/0xaa0 ffff88004117f998 […] ? security_netlink_send+0x51/0x160 ffff88004117f9c8 […] netlink_sendmsg+0xa03/0x1200 ffff88004117f9f8 […] ? netlink_unicast+0xb00/0xb00 ffff88004117fa70 […] ? netlink_unicast+0xb00/0xb00 ffff88004117fac8 […] ? _syssendmsg+0xe2a/0x1040 ffff88004117faf8 […] __sys_sendmsg+0xe2a/0x1040 ffff88004117fb00 […] ? kernel_recvmsg+0x300/0x300 ffff88004117fb60 […] ? reacquire_held_locks+0xe9/0x260 ffff88004117fbc8 […] syssendmsg+0x138/0x200 ffff88004117fbf8 […] ? do_recvmmsg+0x7e0/0x7e0 ffff88004117fc30 […] ? lockdep_hardirqs_on_prepare+0x101/0x1e0 ffff88004117fc50 […] ? lock_acquire+0x16f/0x320 ffff88004117fd20 […] ? lock_acquire+0x16f/0x320 ffff88004117fd58 […] ? find_held_lock+0x3b/0xe0 ffff88004117fd70 […] sys_sendmsg+0x17a/0x260 ffff88004117fdc8 […] ? __sys_sendmsg_sock+0x80/0x80 ffff88004117fdf0 […] ? syscall_trace_enter+0x15e/0x2c0 ffff88004117fe98 […] do_syscall_64+0x7d/0x400 ffff88004117fec8 […] entry_SYSCALL_64_safe_stack+0x4a/0x60 ffff88004117fef8 ==================================================================
The out-of-bounds report, though, is a red herring as it is f ---truncated---
{
"affected": [],
"aliases": [
"CVE-2026-72419"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-15T06:22:15Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_nat: avoid invalid nat_net pointer use on failed nf_nat_init()\n\nWe ran into below KASAN splat, which is mostly uninteresting, beside\nfor having nf_nat_register_fn() in the call chain as a cause for the\noffending access:\n\n==================================================================\nBUG: KASAN: slab-out-of-bounds in nf_nat_register_fn+0x5f9/0x640\nRead of size 8 at addr ffff890031e54c20 by task iptables/9510\n\nCPU: 0 UID: 0 PID: 9510 Comm: iptables Not tainted 6.18.18-grsec-full-20260320181326 #1 PREEMPT(voluntary)\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n [\u2026] dump_stack_lvl+0xee/0x160 ffff88004117eeb8\n [\u2026] print_report+0x6e/0x640 ffff88004117eee0\n [\u2026] ? __phys_addr+0x8e/0x140 ffff88004117eef0\n [\u2026] ? kasan_addr_to_slab+0x51/0xe0 ffff88004117ef08\n [\u2026] ? complete_report_info+0xec/0x1c0 ffff88004117ef20\n [\u2026] ? nf_nat_register_fn+0x5f9/0x640 ffff88004117ef48\n [\u2026] kasan_report+0xbc/0x140 ffff88004117ef50\n [\u2026] ? nf_nat_register_fn+0x5f9/0x640 ffff88004117ef90\n [\u2026] nf_nat_register_fn+0x5f9/0x640 ffff88004117eff8\n [\u2026] ? nf_nat_icmp_reply_translation+0x6e0/0x6e0 ffff88004117f070\n [\u2026] nf_tables_register_hook.part.0+0xa0/0x220 ffff88004117f080\n [\u2026] nf_tables_addchain.constprop.0+0x1054/0x1fc0 ffff88004117f0b8\n [\u2026] ? nft_chain_lookup.part.0+0x4ce/0xac0 ffff88004117f130\n [\u2026] ? nf_tables_abort+0x3d80/0x3d80 ffff88004117f190\n [\u2026] ? nf_tables_dumpreset_obj+0x100/0x100 ffff88004117f1c8\n [\u2026] ? nft_table_lookup.part.0+0x255/0x300 ffff88004117f310\n [\u2026] ? nf_tables_newchain+0x21a4/0x2fa0 ffff88004117f358\n [\u2026] nf_tables_newchain+0x21a4/0x2fa0 ffff88004117f360\n [\u2026] ? nf_tables_addchain.constprop.0+0x1fc0/0x1fc0 ffff88004117f458\n [\u2026] ? nla_get_range_signed+0x4a0/0x4a0 ffff88004117f488\n [\u2026] ? lock_acquire+0x16f/0x320 ffff88004117f490\n [\u2026] ? find_held_lock+0x3b/0xe0 ffff88004117f4b0\n [\u2026] ? __nla_parse+0x45/0x80 ffff88004117f500\n [\u2026] nfnetlink_rcv_batch+0xbca/0x19a0 ffff88004117f550\n [\u2026] ? nfnetlink_net_exit_batch+0x120/0x120 ffff88004117f618\n [\u2026] ? __sanitizer_cov_trace_switch+0x63/0xe0 ffff88004117f720\n [\u2026] ? gr_acl_handle_mmap+0x1c4/0x320 ffff88004117f7c0\n [\u2026] ? nla_get_range_signed+0x4a0/0x4a0 ffff88004117f7e8\n [\u2026] ? gr_is_capable+0x6f/0xe0 ffff88004117f830\n [\u2026] ? __nla_parse+0x45/0x80 ffff88004117f860\n [\u2026] ? skb_pull+0x103/0x1a0 ffff88004117f880\n [\u2026] nfnetlink_rcv+0x3db/0x4a0 ffff88004117f8b0\n [\u2026] ? nfnetlink_rcv_batch+0x19a0/0x19a0 ffff88004117f8d8\n [\u2026] ? netlink_lookup+0xe2/0x240 ffff88004117f900\n [\u2026] netlink_unicast+0x74b/0xb00 ffff88004117f930\n [\u2026] ? netlink_attachskb+0xb20/0xb20 ffff88004117f980\n [\u2026] ? __check_object_size+0x3e/0xaa0 ffff88004117f998\n [\u2026] ? security_netlink_send+0x51/0x160 ffff88004117f9c8\n [\u2026] netlink_sendmsg+0xa03/0x1200 ffff88004117f9f8\n [\u2026] ? netlink_unicast+0xb00/0xb00 ffff88004117fa70\n [\u2026] ? netlink_unicast+0xb00/0xb00 ffff88004117fac8\n [\u2026] ? ____sys_sendmsg+0xe2a/0x1040 ffff88004117faf8\n [\u2026] ____sys_sendmsg+0xe2a/0x1040 ffff88004117fb00\n [\u2026] ? kernel_recvmsg+0x300/0x300 ffff88004117fb60\n [\u2026] ? reacquire_held_locks+0xe9/0x260 ffff88004117fbc8\n [\u2026] ___sys_sendmsg+0x138/0x200 ffff88004117fbf8\n [\u2026] ? do_recvmmsg+0x7e0/0x7e0 ffff88004117fc30\n [\u2026] ? lockdep_hardirqs_on_prepare+0x101/0x1e0 ffff88004117fc50\n [\u2026] ? lock_acquire+0x16f/0x320 ffff88004117fd20\n [\u2026] ? lock_acquire+0x16f/0x320 ffff88004117fd58\n [\u2026] ? find_held_lock+0x3b/0xe0 ffff88004117fd70\n [\u2026] __sys_sendmsg+0x17a/0x260 ffff88004117fdc8\n [\u2026] ? __sys_sendmsg_sock+0x80/0x80 ffff88004117fdf0\n [\u2026] ? syscall_trace_enter+0x15e/0x2c0 ffff88004117fe98\n [\u2026] do_syscall_64+0x7d/0x400 ffff88004117fec8\n [\u2026] entry_SYSCALL_64_safe_stack+0x4a/0x60 ffff88004117fef8\n \u003c/TASK\u003e\n==================================================================\n\nThe out-of-bounds report, though, is a red herring as it is f\n---truncated---",
"id": "GHSA-mpg4-7mw3-ccvq",
"modified": "2026-08-17T06:33:28Z",
"published": "2026-08-15T06:32:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72419"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/069cfe3de2a5e16069485893cd04665ab769c1d8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/359d8ff97362a4662356104540e4814bff9dad7c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/87f7a720de2545fdac29c85acb7163676feacdaf"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a73e7ac3f3b69e9581ec7bfd889ff3e9b8c773f7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e794f633021defcfa98e17d73b955cd07590831f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/eb14aba91163c33d8c99f9d7c06690e08b56a250"
}
],
"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"
}
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.