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CVE-2025-38051

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free in cifs_fill_dirent There is a race condition in the readdir concurrency process, which may acc…

Published Jun 18, 2025CWE-416EPSS 0.20%

Overview

CVE-2025-38051 is a high-severity vulnerability. It was published on June 18, 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:

smb: client: Fix use-after-free in cifs_fill_dirent

There is a race condition in the readdir concurrency process, which may

access the rsp buffer after it has been released, triggering the

following KASAN warning.

==================================================================

BUG: KASAN: slab-use-after-free in cifs_fill_dirent+0xb03/0xb60 [cifs]

Read of size 4 at addr ffff8880099b819c by task a.out/342975

CPU: 2 UID: 0 PID: 342975 Comm: a.out Not tainted 6.15.0-rc6+ #240 PREEMPT(full)

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014

Call Trace:

<TASK>

dump_stack_lvl+0x53/0x70

print_report+0xce/0x640

kasan_report+0xb8/0xf0

cifs_fill_dirent+0xb03/0xb60 [cifs]

cifs_readdir+0x12cb/0x3190 [cifs]

iterate_dir+0x1a1/0x520

__x64_sys_getdents+0x134/0x220

do_syscall_64+0x4b/0x110

entry_SYSCALL_64_after_hwframe+0x76/0x7e

RIP: 0033:0x7f996f64b9f9

Code: ff c3 66

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/1b197931fbc821bc7e9e91bf619400db563e3338Refgit.kernel.org/stable/c/73cadde98f67f76c5eba00ac0b72c453383cec8bRefgit.kernel.org/stable/c/9bea368648ac46f8593a780760362e40291d22a9Refgit.kernel.org/stable/c/9c9aafbacc183598f064902365e107b5e856531fRefgit.kernel.org/stable/c/a24c2f05ac3c5b0aaa539d9d913826d2643dfd0eRefgit.kernel.org/stable/c/a7a8fe56e932a36f43e031b398aef92341bf5ea0Refgit.kernel.org/stable/c/aee067e88d61eb72e966f094e4749c6b14e7008fRefgit.kernel.org/stable/c/c8623231e0edfcccb7cc6add0288fa0f0594282fReflists.debian.org/debian-lts-announce/2025/10/msg00007.htmlReflists.debian.org/debian-lts-announce/2025/10/msg00008.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38051?

CVE-2025-38051 is a high-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-38051?

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-2025-38051?

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-2025-38051?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38051 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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