CVSS 3.1
5.5 mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCVE-2024-42108
Medium (5.5) in linux linux kernel. EPSS 0.6% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 0.6% chance of exploitation in the next 30 days; higher than 50% of CVEs (scores of 2026-10-31)
- CWE
- CWE-416
- Published
- Modified
- Record from
- the NVD, synced
Affected
- linux:linux_kernel
References
- https://git.kernel.org/stable/c/4a41bb9f2b402469d425a1c13359d3b3ea4e6403
- https://git.kernel.org/stable/c/92cbbe7759193e3418f38d0d73f8fe125312c58b
- https://git.kernel.org/stable/c/9a0c28efeec6383ef22e97437616b920e7320b67
- https://git.kernel.org/stable/c/92cbbe7759193e3418f38d0d73f8fe125312c58b
- https://git.kernel.org/stable/c/9a0c28efeec6383ef22e97437616b920e7320b67