PT-2025-8871 · Linux+10 · Linux Kernel+10
Published
2025-02-07
·
Updated
2026-04-20
·
CVE-2025-21759
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A potential issue in the Linux kernel has been identified, related to the igmp6 send() function. This function can be called without the necessary synchronization, potentially leading to a use-after-free (UAF) condition. To address this, RCU protection has been extended to ensure safe access to the net pointer. Additionally, the allocation method for sending skb has been changed from sock alloc send skb() to alloc skb() due to the use of GFP KERNEL allocations, which can sleep.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Debian
Linuxmint
Linux Kernel
Red Hat
Rocky Linux
Suse
Ubuntu