CVE-2025-21758
5.5
MEDIUM
CVSS 3.1
EPSS 13.0%
Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: add RCU protection to mld_newpack() mld_newpack() can be called without RTNL or RCU being held. Note that we no longer can use sock_alloc_send_skb() because ipv6.igmp_sk uses GFP_KERNEL allocations which can sleep. Instead use alloc_skb() and charge the net->ipv6.igmp_sk socket under RCU protection.
How to fix CVE-2025-21758
To remediate CVE-2025-21758, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 6.1.129-1~deb11u1 or later
Is CVE-2025-21758 being exploited?
Moderate — EPSS is 13.0%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (2)
- from 0
- from 0, < 6.1.129-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |