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CVE-2025-38572

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ipv6: reject malicious packets in ipv6_gso_segment() syzbot was able to craft a packet with very long IPv6 extension headers le…

Published Aug 19, 2025EPSS 0.18%

Overview

CVE-2025-38572 is a high-severity vulnerability. It was published on August 19, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

ipv6: reject malicious packets in ipv6_gso_segment()

syzbot was able to craft a packet with very long IPv6 extension headers

leading to an overflow of skb->transport_header.

This 16bit field has a limited range.

Add skb_reset_transport_header_careful() helper and use it

from ipv6_gso_segment()

WARNING: CPU: 0 PID: 5871 at ./include/linux/skbuff.h:3032 skb_reset_transport_header include/linux/skbuff.h:3032 [inline]

WARNING: CPU: 0 PID: 5871 at ./include/linux/skbuff.h:3032 ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151

Modules linked in:

CPU: 0 UID: 0 PID: 5871 Comm: syz-executor211 Not tainted 6.16.0-rc6-syzkaller-g7abc678e3084 #0 PREEMPT(full)

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025

RIP: 0010:skb_reset_transport_header include/linux/skbuff.h:3032 [inline]

RIP: 0010:ipv6_gso_segment+0x15e2/0x21e0 net/ipv6/ip6_offload.c:151

Call Trace:

<TASK>

skb_mac

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/09ff062b89d8e48165247d677d1ca23d6d607e9bRefgit.kernel.org/stable/c/3f638e0b28bde7c3354a0df938ab3a96739455d1Refgit.kernel.org/stable/c/5489e7fc6f8be3062f8cb7e49406de4bfd94db67Refgit.kernel.org/stable/c/573b8250fc2554761db3bc2bbdbab23789d52d4eRefgit.kernel.org/stable/c/5dc60b2a00ed7629214ac0c48e43f40af2078703Refgit.kernel.org/stable/c/d45cf1e7d7180256e17c9ce88e32e8061a7887feRefgit.kernel.org/stable/c/de322cdf600fc9433845a9e944d1ca6b31cfb67eRefgit.kernel.org/stable/c/ee851768e4b8371ce151fd446d24bf3ae2d18789Refgit.kernel.org/stable/c/ef05007b403dcc21e701cb1f30d4572ac0a9da20Reflists.debian.org/debian-lts-announce/2025/10/msg00007.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38572?

CVE-2025-38572 is a high-severity vulnerability. It was published on August 19, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-38572?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-38572?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-38572?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38572 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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