cve-2021-47459
Vulnerability from cvelistv5
Published
2024-05-22 06:23
Modified
2024-09-11 17:33
Severity
Summary
can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47459\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-22T07:15:10.863\",\"lastModified\":\"2024-05-22T12:46:53.887\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: j1939: j1939_netdev_start(): arreglar UAF para rx_kref de j1939_priv Activar\u00e1 UAF para rx_kref de j1939_priv de la siguiente manera. 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 ..... kref_put_lock(\u0026amp;priv-\u0026gt;rx_kref, ...) kref_get(\u0026amp;priv-\u0026gt;rx_kref , ...) REFCOUNT_WARN(\\\"adici\u00f3n en 0;...\\\") ================================== ==================== refcount_t: suma en 0; use-after-free. ADVERTENCIA: CPU: 1 PID: 20874 en lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 RIP: 0010:refcount_warn_saturate+0x169/0x1e0 Seguimiento de llamadas: j1939_netdev_start+0x68b/0x920 j1939_sk_bind+0x426 /0xeb0 ? security_socket_bind+0x83/0xb0 Los kref_get() y kref_put() de rx_kref deben usar j1939_netdev_lock para proteger.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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