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CVE-2023-53088

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: mptcp: fix UaF in listener shutdown As reported by Christoph after having refactored the passive socket initialization, the mpt…

Published May 2, 2025CWE-416EPSS 0.20%

Overview

CVE-2023-53088 is a high-severity vulnerability. It was published on May 2, 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:

mptcp: fix UaF in listener shutdown

As reported by Christoph after having refactored the passive

socket initialization, the mptcp listener shutdown path is prone

to an UaF issue.

BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x73/0xe0

Write of size 4 at addr ffff88810cb23098 by task syz-executor731/1266

CPU: 1 PID: 1266 Comm: syz-executor731 Not tainted 6.2.0-rc59af4eaa31c1f6c00c8f1e448ed99a45c66340dd5 #6

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014

Call Trace:

<TASK>

dump_stack_lvl+0x6e/0x91

print_report+0x16a/0x46f

kasan_report+0xad/0x130

kasan_check_range+0x14a/0x1a0

_raw_spin_lock_bh+0x73/0xe0

subflow_error_report+0x6d/0x110

sk_error_report+0x3b/0x190

tcp_disconnect+0x138c/0x1aa0

inet_child_forget+0x6f/0x2e0

inet_csk_listen_stop+0x209/0x1060

__mptcp_close_ssk+0x52d/0x610

mptcp_destroy_common

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/0a3f4f1f9c27215e4ddcd312558342e57b93e518Refgit.kernel.org/stable/c/0f4f4cf5d32f10543deb946a37111e714579511eRefgit.kernel.org/stable/c/5564be74a22a61855f8b8c100d8c4abb003bb792

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53088?

CVE-2023-53088 is a high-severity vulnerability. It was published on May 2, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53088?

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-2023-53088?

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-2023-53088?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53088 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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