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CVE-2025-38622

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: drop UFO packets in udp_rcv_segment() When sending a packet with virtio_net_hdr to tun device, if the gso_type in virtio_n…

Published Aug 22, 2025EPSS 0.18%

Overview

CVE-2025-38622 is a medium-severity vulnerability. It was published on August 22, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

net: drop UFO packets in udp_rcv_segment()

When sending a packet with virtio_net_hdr to tun device, if the gso_type

in virtio_net_hdr is SKB_GSO_UDP and the gso_size is less than udphdr

size, below crash may happen.

------------[ cut here ]------------

kernel BUG at net/core/skbuff.c:4572!

Oops: invalid opcode: 0000 [#1] SMP NOPTI

CPU: 0 UID: 0 PID: 62 Comm: mytest Not tainted 6.16.0-rc7 #203 PREEMPT(voluntary)

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014

RIP: 0010:skb_pull_rcsum+0x8e/0xa0

Code: 00 00 5b c3 cc cc cc cc 8b 93 88 00 00 00 f7 da e8 37 44 38 00 f7 d8 89 83 88 00 00 00 48 8b 83 c8 00 00 00 5b c3 cc cc cc cc <0f> 0b 0f 0b 66 66 2e 0f 1f 84 00 000

RSP: 0018:ffffc900001fba38 EFLAGS: 00000297

RAX: 0000000000000004 RBX: ffff8880040c1000 RCX: ffffc900001fb948

RDX: ffff888003e6d700 RSI: 0000000000000008 RDI: ffff88800411a062

RBP: ffff8880040c1000 R08: 000

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/0c639c6479ec4480372901a5fc566f7588cf5522Refgit.kernel.org/stable/c/0d45954034f8edd6d4052e0190d3d6335c37e4deRefgit.kernel.org/stable/c/4c1022220b1b6fea802175e80444923a3bbf93a5Refgit.kernel.org/stable/c/72f97d3cb791e26492236b2be7fd70d2c6222555Refgit.kernel.org/stable/c/791f32c5eab33ca3a153f8f6f763aa0df1ddc320Refgit.kernel.org/stable/c/c0ec2e47f1e92d69b42b17a4a1e543256778393eRefgit.kernel.org/stable/c/d46e51f1c78b9ab9323610feb14238d06d46d519Refgit.kernel.org/stable/c/df6ad849d59256dcc0e2234844ef9f0daf885f5cRefgit.kernel.org/stable/c/fc45b3f9599b657d4a64bcf423d2a977b3e13a49Reflists.debian.org/debian-lts-announce/2025/10/msg00007.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38622?

CVE-2025-38622 is a medium-severity vulnerability. It was published on August 22, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-38622?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-38622?

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-2025-38622?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38622 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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