CVE-2021-47459
- Source
- https://cve.org/CVERecord?id=CVE-2021-47459
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47459.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47459
- Downstream
- Related
- Published
- 2024-05-22T07:15:10Z
- Modified
- 2026-03-15T14:09:23Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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 cpu1j1939_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.
- References
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47459.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "5.4"
},
{
"fixed": "5.4.156"
}
]
},
{
"events": [
{
"introduced": "5.5"
},
{
"fixed": "5.10.76"
}
]
},
{
"events": [
{
"introduced": "5.11"
},
{
"fixed": "5.14.15"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc1"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc2"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc3"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc4"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc5"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc6"
}
]
}
]