Vulnerability Information
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Vulnerability Title
net: rswitch: Avoid use-after-free in rswitch_poll()
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: rswitch: Avoid use-after-free in rswitch_poll() The use-after-free is actually in rswitch_tx_free(), which is inlined in rswitch_poll(). Since `skb` and `gq->skbs[gq->dirty]` are in fact the same pointer, the skb is first freed using dev_kfree_skb_any(), then the value in skb->len is used to update the interface statistics. Let's move around the instructions to use skb->len before the skb is freed. This bug is trivial to reproduce using KFENCE. It will trigger a splat every few packets. A simple ARP request or ICMP echo request is enough.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Linux kernel 安全漏洞
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel 存在安全漏洞，该漏洞源于net:rswitch模块中在rswitch_tx_free()中，由于skb和gq_skbs[gq_dirty]实际上是同一个指针，skb首先被dev_kfree_skb_any()释放，然后使用skb->len更新接口统计信息，导致释放后重用问题。
CVSS Information
N/A
Vulnerability Type
N/A