GHSA-PP55-X3VR-94GX

Vulnerability from github – Published: 2024-11-19 18:31 – Updated: 2025-11-04 00:32
VLAI?
Details

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

ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_init_flow()

There are code paths from which the function is called without holding the RCU read lock, resulting in a suspicious RCU usage warning [1].

Fix by using l3mdev_master_upper_ifindex_by_index() which will acquire the RCU read lock before calling l3mdev_master_upper_ifindex_by_index_rcu().

[1] WARNING: suspicious RCU usage 6.12.0-rc3-custom-gac8f72681cf2 #141 Not tainted

net/core/dev.c:876 RCU-list traversed in non-reader section!!

other info that might help us debug this:

rcu_scheduler_active = 2, debug_locks = 1 1 lock held by ip/361: #0: ffffffff86fc7cb0 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x377/0xf60

stack backtrace: CPU: 3 UID: 0 PID: 361 Comm: ip Not tainted 6.12.0-rc3-custom-gac8f72681cf2 #141 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 Call Trace: dump_stack_lvl+0xba/0x110 lockdep_rcu_suspicious.cold+0x4f/0xd6 dev_get_by_index_rcu+0x1d3/0x210 l3mdev_master_upper_ifindex_by_index_rcu+0x2b/0xf0 ip_tunnel_bind_dev+0x72f/0xa00 ip_tunnel_newlink+0x368/0x7a0 ipgre_newlink+0x14c/0x170 __rtnl_newlink+0x1173/0x19c0 rtnl_newlink+0x6c/0xa0 rtnetlink_rcv_msg+0x3cc/0xf60 netlink_rcv_skb+0x171/0x450 netlink_unicast+0x539/0x7f0 netlink_sendmsg+0x8c1/0xd80 _syssendmsg+0x8f9/0xc20 _sys_sendmsg+0x197/0x1e0 __sys_sendmsg+0x122/0x1f0 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-53042"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-19T18:15:24Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_init_flow()\n\nThere are code paths from which the function is called without holding\nthe RCU read lock, resulting in a suspicious RCU usage warning [1].\n\nFix by using l3mdev_master_upper_ifindex_by_index() which will acquire\nthe RCU read lock before calling\nl3mdev_master_upper_ifindex_by_index_rcu().\n\n[1]\nWARNING: suspicious RCU usage\n6.12.0-rc3-custom-gac8f72681cf2 #141 Not tainted\n-----------------------------\nnet/core/dev.c:876 RCU-list traversed in non-reader section!!\n\nother info that might help us debug this:\n\nrcu_scheduler_active = 2, debug_locks = 1\n1 lock held by ip/361:\n #0: ffffffff86fc7cb0 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x377/0xf60\n\nstack backtrace:\nCPU: 3 UID: 0 PID: 361 Comm: ip Not tainted 6.12.0-rc3-custom-gac8f72681cf2 #141\nHardware name: Bochs Bochs, BIOS Bochs 01/01/2011\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0xba/0x110\n lockdep_rcu_suspicious.cold+0x4f/0xd6\n dev_get_by_index_rcu+0x1d3/0x210\n l3mdev_master_upper_ifindex_by_index_rcu+0x2b/0xf0\n ip_tunnel_bind_dev+0x72f/0xa00\n ip_tunnel_newlink+0x368/0x7a0\n ipgre_newlink+0x14c/0x170\n __rtnl_newlink+0x1173/0x19c0\n rtnl_newlink+0x6c/0xa0\n rtnetlink_rcv_msg+0x3cc/0xf60\n netlink_rcv_skb+0x171/0x450\n netlink_unicast+0x539/0x7f0\n netlink_sendmsg+0x8c1/0xd80\n ____sys_sendmsg+0x8f9/0xc20\n ___sys_sendmsg+0x197/0x1e0\n __sys_sendmsg+0x122/0x1f0\n do_syscall_64+0xbb/0x1d0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f",
  "id": "GHSA-pp55-x3vr-94gx",
  "modified": "2025-11-04T00:32:04Z",
  "published": "2024-11-19T18:31:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-53042"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5edcb3fdb12c3d46a6e79eeeec27d925b80fc168"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/699b48fc31727792edf2cab3829586ae6ba649e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6dfaa458fe923211c766238a224e0a3c0522935c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72c0f482e39c87317ebf67661e28c8d86c93e870"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ad4a3ca6a8e886f6491910a3ae5d53595e40597d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e2742758c9c85c84e077ede5f916479f724e11c2"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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Detection rules are retrieved from Rulezet.