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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.8, < 6.9.9 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/4a41bb9f2b402469d425a1c13359d3b3ea4e6403Patch
- https://git.kernel.org/stable/c/92cbbe7759193e3418f38d0d73f8fe125312c58bPatch
- https://git.kernel.org/stable/c/9a0c28efeec6383ef22e97437616b920e7320b67Patch
- https://git.kernel.org/stable/c/92cbbe7759193e3418f38d0d73f8fe125312c58bPatch
- https://git.kernel.org/stable/c/9a0c28efeec6383ef22e97437616b920e7320b67Patch
FAQ
What is CVE-2024-42108?
CVE-2024-42108 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 rswi...
How severe is CVE-2024-42108?
CVE-2024-42108 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-42108?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.