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CVE-2025-38196

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: io_uring/rsrc: validate buffer count with offset for cloning syzbot reports that it can trigger a WARN_ON() for kmalloc() attem…

Published Jul 4, 2025EPSS 0.15%

Overview

CVE-2025-38196 is a medium-severity vulnerability. It was published on July 4, 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:

io_uring/rsrc: validate buffer count with offset for cloning

syzbot reports that it can trigger a WARN_ON() for kmalloc() attempt

that's too big:

WARNING: CPU: 0 PID: 6488 at mm/slub.c:5024 __kvmalloc_node_noprof+0x520/0x640 mm/slub.c:5024

Modules linked in:

CPU: 0 UID: 0 PID: 6488 Comm: syz-executor312 Not tainted 6.15.0-rc7-syzkaller-gd7fa1af5b33e #0 PREEMPT

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025

pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : __kvmalloc_node_noprof+0x520/0x640 mm/slub.c:5024

lr : __do_kmalloc_node mm/slub.c:-1 [inline]

lr : __kvmalloc_node_noprof+0x3b4/0x640 mm/slub.c:5012

sp : ffff80009cfd7a90

x29: ffff80009cfd7ac0 x28: ffff0000dd52a120 x27: 0000000000412dc0

x26: 0000000000000178 x25: ffff7000139faf70 x24: 0000000000000000

x23: ffff800082f4cea8 x22: 00000000ffffffff x21: 000000010cd004a8

x20: ffff0000d75816c0 x19: ffff0000dd

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/0e23ac818f3afb16660b0ba384875d56a7013879Refgit.kernel.org/stable/c/1d27f11bf02b38c431e49a17dee5c10a2b4c2e28

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38196?

CVE-2025-38196 is a medium-severity vulnerability. It was published on July 4, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-38196?

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-2025-38196?

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-2025-38196?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38196 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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