linux: In the Linux kernel, the following vulnerability has been resolved: net: rswitch: Avoid use-after-free in rswitch_po...
CVE-2024-42108 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-42108, released July 30, 2024. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 13.5 (trixie) | 6.9.9-1 | DEBIAN-CVE-2024-42108 | Jul 30, 2024 |
| linux · Debian 14 | 6.9.9-1 | DEBIAN-CVE-2024-42108 | Jul 30, 2024 |
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