cve-2024-42108
Vulnerability from cvelistv5
Published
2024-07-30 07:46
Modified
2024-12-19 18:32
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4a41bb9f2b402469d425a1c13359d3b3ea4e6403
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92cbbe7759193e3418f38d0d73f8fe125312c58bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a0c28efeec6383ef22e97437616b920e7320b67Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/92cbbe7759193e3418f38d0d73f8fe125312c58bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9a0c28efeec6383ef22e97437616b920e7320b67Patch
Impacted products
Vendor Product Version
Linux Linux Version: 0aeec4bb6a9fc963932bf3c929bdf27d835d44e9
Version: 271e015b91535dd87fd0f5df0cc3b906c2eddef9
Version: 271e015b91535dd87fd0f5df0cc3b906c2eddef9
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   Linux Linux Version: 6.8
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