CVE-2025-21759 Affecting linux-virt-doc package, versions <6.12.17-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.03% (9th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-LINUXVIRTDOC-13328906
  • published6 Oct 2025
  • disclosed27 Feb 2025

Introduced: 27 Feb 2025

CVE-2025-21759  (opens in a new tab)

How to fix?

Upgrade Minimos:latest linux-virt-doc to version 6.12.17-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-virt-doc package and not the linux-virt-doc package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

ipv6: mcast: extend RCU protection in igmp6_send()

igmp6_send() can be called without RTNL or RCU being held.

Extend RCU protection so that we can safely fetch the net pointer and avoid a potential UAF.

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.

CVSS Base Scores

version 3.1