GHSA-CMV7-4284-J9GC

Vulnerability from github – Published: 2026-02-04 18:30 – Updated: 2026-02-06 18:30
VLAI?
Details

In the Linux kernel, the following vulnerability has been resolved:

bonding: limit BOND_MODE_8023AD to Ethernet devices

BOND_MODE_8023AD makes sense for ARPHRD_ETHER only.

syzbot reported:

BUG: KASAN: global-out-of-bounds in __hw_addr_create net/core/dev_addr_lists.c:63 [inline] BUG: KASAN: global-out-of-bounds in __hw_addr_add_ex+0x25d/0x760 net/core/dev_addr_lists.c:118 Read of size 16 at addr ffffffff8bf94040 by task syz.1.3580/19497

CPU: 1 UID: 0 PID: 19497 Comm: syz.1.3580 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 __hw_addr_create net/core/dev_addr_lists.c:63 [inline] __hw_addr_add_ex+0x25d/0x760 net/core/dev_addr_lists.c:118 __dev_mc_add net/core/dev_addr_lists.c:868 [inline] dev_mc_add+0xa1/0x120 net/core/dev_addr_lists.c:886 bond_enslave+0x2b8b/0x3ac0 drivers/net/bonding/bond_main.c:2180 do_set_master+0x533/0x6d0 net/core/rtnetlink.c:2963 do_setlink+0xcf0/0x41c0 net/core/rtnetlink.c:3165 rtnl_changelink net/core/rtnetlink.c:3776 [inline] __rtnl_newlink net/core/rtnetlink.c:3935 [inline] rtnl_newlink+0x161c/0x1c90 net/core/rtnetlink.c:4072 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:742 _syssendmsg+0x505/0x820 net/socket.c:2592 _sys_sendmsg+0x21f/0x2a0 net/socket.c:2646 __sys_sendmsg+0x164/0x220 net/socket.c:2678 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x1dc/0x560 arch/x86/entry/syscall_32.c:307 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:332 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

The buggy address belongs to the variable: lacpdu_mcast_addr+0x0/0x40

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23099"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-04T17:16:20Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: limit BOND_MODE_8023AD to Ethernet devices\n\nBOND_MODE_8023AD makes sense for ARPHRD_ETHER only.\n\nsyzbot reported:\n\n BUG: KASAN: global-out-of-bounds in __hw_addr_create net/core/dev_addr_lists.c:63 [inline]\n BUG: KASAN: global-out-of-bounds in __hw_addr_add_ex+0x25d/0x760 net/core/dev_addr_lists.c:118\nRead of size 16 at addr ffffffff8bf94040 by task syz.1.3580/19497\n\nCPU: 1 UID: 0 PID: 19497 Comm: syz.1.3580 Tainted: G             L      syzkaller #0 PREEMPT(full)\nTainted: [L]=SOFTLOCKUP\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025\nCall Trace:\n \u003cTASK\u003e\n  dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120\n  print_address_description mm/kasan/report.c:378 [inline]\n  print_report+0xca/0x240 mm/kasan/report.c:482\n  kasan_report+0x118/0x150 mm/kasan/report.c:595\n check_region_inline mm/kasan/generic.c:-1 [inline]\n  kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200\n  __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105\n  __hw_addr_create net/core/dev_addr_lists.c:63 [inline]\n  __hw_addr_add_ex+0x25d/0x760 net/core/dev_addr_lists.c:118\n  __dev_mc_add net/core/dev_addr_lists.c:868 [inline]\n  dev_mc_add+0xa1/0x120 net/core/dev_addr_lists.c:886\n  bond_enslave+0x2b8b/0x3ac0 drivers/net/bonding/bond_main.c:2180\n  do_set_master+0x533/0x6d0 net/core/rtnetlink.c:2963\n  do_setlink+0xcf0/0x41c0 net/core/rtnetlink.c:3165\n  rtnl_changelink net/core/rtnetlink.c:3776 [inline]\n  __rtnl_newlink net/core/rtnetlink.c:3935 [inline]\n  rtnl_newlink+0x161c/0x1c90 net/core/rtnetlink.c:4072\n  rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958\n  netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550\n  netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]\n  netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344\n  netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894\n  sock_sendmsg_nosec net/socket.c:727 [inline]\n  __sock_sendmsg+0x21c/0x270 net/socket.c:742\n  ____sys_sendmsg+0x505/0x820 net/socket.c:2592\n  ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2646\n  __sys_sendmsg+0x164/0x220 net/socket.c:2678\n  do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]\n  __do_fast_syscall_32+0x1dc/0x560 arch/x86/entry/syscall_32.c:307\n  do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:332\n entry_SYSENTER_compat_after_hwframe+0x84/0x8e\n \u003c/TASK\u003e\n\nThe buggy address belongs to the variable:\n lacpdu_mcast_addr+0x0/0x40",
  "id": "GHSA-cmv7-4284-j9gc",
  "modified": "2026-02-06T18:30:31Z",
  "published": "2026-02-04T18:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23099"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43dee6f7ef1d228821de1b61c292af3744c8d7da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5063b2cd9b27d35ab788d707d7858ded0acc8f1d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72925dbb0c8c7b16bf922e93c6cc03cbd8c955c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/80c881e53a4fa0a80fa4bef7bc0ead0e8e88940d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c84fcb79e5dbde0b8d5aeeaf04282d2149aebcf6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef68afb1bee8d35a18896c27d7358079353d8d8a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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