Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0aeec4bb6a9fc963932bf3c929bdf27d835d44e9 before 4a41bb9f2b402469d425a1c13359d3b3ea4e6403; affected 271e015b91535dd87fd0f5df0cc3b906c2eddef9 before 92cbbe7759193e3418f38d0d73f8fe125312c58b; affected 271e015b91535dd87fd0f5df0cc3b906c2eddef9 before 9a0c28efeec6383ef22e97437616b920e7320b67 |
| Linux / Linux | affected 6.8; unaffected 0 before 6.8; unaffected 6.9.9 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4a41bb9f2b402469d425a1c13359d3b3ea4e6403
- https://git.kernel.org/stable/c/92cbbe7759193e3418f38d0d73f8fe125312c58b
- https://git.kernel.org/stable/c/9a0c28efeec6383ef22e97437616b920e7320b67
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.