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CVE-2025-38718

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: sctp: linearize cloned gso packets in sctp_rcv A cloned head skb still shares these frag skbs in fraglist with the original hea…

Published Sep 4, 2025CWE-908EPSS 0.17%

Overview

CVE-2025-38718 is a high-severity vulnerability. It was published on September 4, 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:

sctp: linearize cloned gso packets in sctp_rcv

A cloned head skb still shares these frag skbs in fraglist with the

original head skb. It's not safe to access these frag skbs.

syzbot reported two use-of-uninitialized-memory bugs caused by this:

BUG: KMSAN: uninit-value in sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211

sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211

sctp_assoc_bh_rcv+0x1a7/0xc50 net/sctp/associola.c:998

sctp_inq_push+0x2ef/0x380 net/sctp/inqueue.c:88

sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331

sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1122

__release_sock+0x1da/0x330 net/core/sock.c:3106

release_sock+0x6b/0x250 net/core/sock.c:3660

sctp_wait_for_connect+0x487/0x820 net/sctp/socket.c:9360

sctp_sendmsg_to_asoc+0x1ec1/0x1f00 net/sctp/socket.c:1885

sctp_sendmsg+0x32b9/0x4a80 net/sctp/socket.c:2031

inet_sendmsg+0x25a/0x280 net/ipv4/af_inet.c:851

sock_sen

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/03d0cc6889e02420125510b5444b570f4bbf53d5Refgit.kernel.org/stable/c/1bd5214ea681584c5886fea3ba03e49f93a43c0eRefgit.kernel.org/stable/c/4506bcaabe004d07be8ff09116a3024fbd6aa965Refgit.kernel.org/stable/c/7d757f17bc2ef2727994ffa6d5d6e4bc4789a770Refgit.kernel.org/stable/c/cd0e92bb2b7542fb96397ffac639b4f5b099d0cbRefgit.kernel.org/stable/c/d0194e391bb493aa6cec56d177b14df6b29188d5Refgit.kernel.org/stable/c/ea094f38d387d1b0ded5dee4a3e5720aa4ce0139Refgit.kernel.org/stable/c/fc66772607101bd2030a4332b3bd0ea3b3605250Refgit.kernel.org/stable/c/fd60d8a086191fe33c2d719732d2482052fa6805Reflists.debian.org/debian-lts-announce/2025/10/msg00007.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38718?

CVE-2025-38718 is a high-severity vulnerability. It was published on September 4, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-38718?

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-2025-38718?

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-2025-38718?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38718 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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