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Use After Free The advisory has been revoked - it doesn't affect any version of package kernel-devel-matched  (opens in a new tab)

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EPSS
0.24% (15th percentile)

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  • Snyk IDSNYK-ALMALINUX10-KERNELDEVELMATCHED-14119869
  • published26 Nov 2025
  • disclosed11 Nov 2025
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Introduced: 11 Nov 2025

CVE-2025-21791  (opens in a new tab)
CWE-416  (opens in a new tab)

Amendment

The AlmaLinux security team deemed this advisory irrelevant for AlmaLinux:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-devel-matched package and not the kernel-devel-matched package as distributed by AlmaLinux.

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

vrf: use RCU protection in l3mdev_l3_out()

l3mdev_l3_out() can be called without RCU being held:

raw_sendmsg() ip_push_pending_frames() ip_send_skb() ip_local_out() __ip_local_out() l3mdev_ip_out()

Add rcu_read_lock() / rcu_read_unlock() pair to avoid a potential UAF.

References