Answer in brief
CVE-2024-42108 records a Critical severity (CVSS 9.8) vulnerability in net: rswitch: Avoid use-after-free in rswitch_poll(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0aeec4bb6a9fc963932bf3c929bdf27d835d44e9 <4a41bb9f2b402469d425a1c13359d3b3ea4e6403 || >=271e015b91535dd87fd0f5df0cc3b906c2eddef9 <92cbbe7759193e3418f38d0d73f8fe125312c58b || >=271e015b91535dd87fd0f5df0cc3b906c2eddef9 <9a0c28efeec6383ef22e97437616b920e7320b67 | 4a41bb9f2b402469d425a1c13359d3b3ea4e6403, 92cbbe7759193e3418f38d0d73f8fe125312c58b, 9a0c28efeec6383ef22e97437616b920e7320b67 |
| Linux/Linuxgeneric | 6.8 | Not reported |
Published upstream
Jul 30, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.