Tracker / CVE-2025-39848
CVE-2025-39848
High 8.8
In the Linux kernel, the following vulnerability has been resolved: ax25: properly unshare skbs in ax25_kiss_rcv() Bernard Pidoux reported a regression apparently caused by commit c353e8983e0d ("net: introduce per netns packet chains"). skb->dev becomes NULL and we crash in __netif_receive_skb_core(). Before above commit, different kind of bugs or corruptions could happen without a major crash. But the root cause is that ax25_kiss_rcv() can queue/mangle input skb without checking if this skb is shared or not. Many thanks to Bernard Pidoux for his help, diagnosis and tests. We had a similar issue years ago fixed with commit 7aaed57c5c28 ("phonet: properly unshare skbs in phonet_rcv()").
Affected products and versions
| debian | debian_linux |
|---|---|
| linux | linux_kernel |
| linux | linux_kernel · 2.6.12.1 → 5.4.299 |
| linux | linux_kernel · 5.11 → 5.15.192 |
| linux | linux_kernel · 5.16 → 6.1.151 |
| linux | linux_kernel · 5.5 → 5.10.243 |
| linux | linux_kernel · 6.13 → 6.16.6 |
| linux | linux_kernel · 6.2 → 6.6.105 |
| linux | linux_kernel · 6.7 → 6.12.46 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.