VDB
DEBIAN-CVE-2025-39848
DEBIAN-CVE-2025-39848
PUBLISHED
CVSS 5.5 MEDIUM
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()").
Risk Scores
CVSS 3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:11 | linux-6.1 | 6.1.112-1~deb11u1, 6.1.106-3~deb11u2, 6.1.106-3~deb11u1 |
| Debian:12 | linux | 6.1.106-3, 6.1.112-1, 6.1.115-1 |
| Debian:14 | linux | 6.14.6-1, 6.12.41-1, 6.12.43-1 |
| Debian:13 | linux | 6.12.43-1, 6.12.43-1, 6.12.41-1 |
| Debian:11 | linux | 5.10.205-2, 5.10.209-1, 5.10.209-2 |
Timeline
- Sep 19, 2025 CVE Published
- Apr 28, 2026 CVE Updated