CVE-2025-21760 Affecting kernel-tools-devel package, versions <0:4.14.355-276.618.amzn2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.02% (4th percentile)

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  • Snyk IDSNYK-AMZN2-KERNELTOOLSDEVEL-9727998
  • published17 Apr 2025
  • disclosed27 Feb 2025

Introduced: 27 Feb 2025

CVE-2025-21760  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 kernel-tools-devel to version 0:4.14.355-276.618.amzn2 or higher.
This issue was patched in ALAS2-2025-2826.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools-devel package and not the kernel-tools-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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

ndisc: extend RCU protection in ndisc_send_skb()

ndisc_send_skb() can be called without RTNL or RCU held.

Acquire rcu_read_lock() earlier, so that we can use dev_net_rcu() and avoid a potential UAF.

CVSS Base Scores

version 3.1