ghsa-7xq6-r35j-j33m
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv
It will trigger UAF for rx_kref of j1939_priv as following.
cpu0 cpu1
j1939_sk_bind(socket0, ndev0, ...) j1939_netdev_start j1939_sk_bind(socket1, ndev0, ...) j1939_netdev_start j1939_priv_set j1939_priv_get_by_ndev_locked j1939_jsk_add ..... j1939_netdev_stop kref_put_lock(&priv->rx_kref, ...) kref_get(&priv->rx_kref, ...) REFCOUNT_WARN("addition on 0;...")
==================================================== refcount_t: addition on 0; use-after-free. WARNING: CPU: 1 PID: 20874 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 RIP: 0010:refcount_warn_saturate+0x169/0x1e0 Call Trace: j1939_netdev_start+0x68b/0x920 j1939_sk_bind+0x426/0xeb0 ? security_socket_bind+0x83/0xb0
The rx_kref's kref_get() and kref_put() should use j1939_netdev_lock to protect.
{
"affected": [],
"aliases": [
"CVE-2021-47459"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-22T07:15:10Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv\n\nIt will trigger UAF for rx_kref of j1939_priv as following.\n\n cpu0 cpu1\nj1939_sk_bind(socket0, ndev0, ...)\nj1939_netdev_start\n j1939_sk_bind(socket1, ndev0, ...)\n j1939_netdev_start\nj1939_priv_set\n j1939_priv_get_by_ndev_locked\nj1939_jsk_add\n.....\nj1939_netdev_stop\nkref_put_lock(\u0026priv-\u003erx_kref, ...)\n kref_get(\u0026priv-\u003erx_kref, ...)\n REFCOUNT_WARN(\"addition on 0;...\")\n\n====================================================\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 1 PID: 20874 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0\nRIP: 0010:refcount_warn_saturate+0x169/0x1e0\nCall Trace:\n j1939_netdev_start+0x68b/0x920\n j1939_sk_bind+0x426/0xeb0\n ? security_socket_bind+0x83/0xb0\n\nThe rx_kref\u0027s kref_get() and kref_put() should use j1939_netdev_lock to\nprotect.",
"id": "GHSA-7xq6-r35j-j33m",
"modified": "2024-05-22T09:31:45Z",
"published": "2024-05-22T09:31:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47459"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586"
}
],
"schema_version": "1.4.0",
"severity": []
}