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CVE-2023-53427

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix warning and UAF when destroy the MR list If the MR allocate failed, the MR recovery work not initialized and list not…

Published Sep 18, 2025CWE-416EPSS 0.15%

Overview

CVE-2023-53427 is a high-severity vulnerability. It was published on September 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:

cifs: Fix warning and UAF when destroy the MR list

If the MR allocate failed, the MR recovery work not initialized

and list not cleared. Then will be warning and UAF when release

the MR:

WARNING: CPU: 4 PID: 824 at kernel/workqueue.c:3066 __flush_work.isra.0+0xf7/0x110

CPU: 4 PID: 824 Comm: mount.cifs Not tainted 6.1.0-rc5+ #82

RIP: 0010:__flush_work.isra.0+0xf7/0x110

Call Trace:

<TASK>

__cancel_work_timer+0x2ba/0x2e0

smbd_destroy+0x4e1/0x990

_smbd_get_connection+0x1cbd/0x2110

smbd_get_connection+0x21/0x40

cifs_get_tcp_session+0x8ef/0xda0

mount_get_conns+0x60/0x750

cifs_mount+0x103/0xd00

cifs_smb3_do_mount+0x1dd/0xcb0

smb3_get_tree+0x1d5/0x300

vfs_get_tree+0x41/0xf0

path_mount+0x9b3/0xdd0

__x64_sys_mount+0x190/0x1d0

do_syscall_64+0x35/0x80

entry_SYSCALL_64_after_hwframe+0x46/0xb0

BUG: KASAN: use-after-free in smbd_destroy+0x4fc/0x990

Read of size 8 at addr ff

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/275a3d2b9408fc4895e342f772cab9a89960546eRefgit.kernel.org/stable/c/2d0c4f5f618f58eba03385363717703bee873c64Refgit.kernel.org/stable/c/3524d6da0fe88aee79f06be6572955d16ad76b39Refgit.kernel.org/stable/c/3e161c2791f8e661eed24a2c624087084d910215Refgit.kernel.org/stable/c/41832c62a75dad530dc5a2856c92ae5459d497e5Refgit.kernel.org/stable/c/7cbd5bdb5bd4404a5da4309521134b42c65846c0Refgit.kernel.org/stable/c/cfd85a0922c4696d768965e686ad805a58d9d834

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53427?

CVE-2023-53427 is a high-severity vulnerability. It was published on September 18, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53427?

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-2023-53427?

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-2023-53427?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53427 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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