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CVE-2023-53344

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: can: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write Syzkaller reported the following issue: ========================…

Published Sep 17, 2025CWE-908EPSS 0.20%

Overview

CVE-2023-53344 is a medium-severity vulnerability. It was published on September 17, 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:

can: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write

Syzkaller reported the following issue:

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

BUG: KMSAN: uninit-value in aio_rw_done fs/aio.c:1520 [inline]

BUG: KMSAN: uninit-value in aio_write+0x899/0x950 fs/aio.c:1600

aio_rw_done fs/aio.c:1520 [inline]

aio_write+0x899/0x950 fs/aio.c:1600

io_submit_one+0x1d1c/0x3bf0 fs/aio.c:2019

__do_sys_io_submit fs/aio.c:2078 [inline]

__se_sys_io_submit+0x293/0x770 fs/aio.c:2048

__x64_sys_io_submit+0x92/0xd0 fs/aio.c:2048

do_syscall_x64 arch/x86/entry/common.c:50 [inline]

do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80

entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was created at:

slab_post_alloc_hook mm/slab.h:766 [inline]

slab_alloc_node mm/slub.c:3452 [inline]

__kmem_cache_alloc_node+0x71f/0xce0 mm/slub.c:3491

__do_kmalloc_node mm/slab_common.c:967 [inline]

__kmalloc+0x11d/0x3b0 mm/slab_common.c

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/2b4c99f7d9a57ecd644eda9b1fb0a1072414959fRefgit.kernel.org/stable/c/2e6ad51c709fa794e0ce26003c9c9cd944e3383aRefgit.kernel.org/stable/c/3fa0f1e0e31b1b73cdf59d4c36c7242e6ef821beRefgit.kernel.org/stable/c/618b15d09fed6126356101543451d49860db4388Refgit.kernel.org/stable/c/78bc7f0ab99458221224d3ab97199c0f8e6861f1Refgit.kernel.org/stable/c/ab2a55907823f0bca56b6d03ea05e4071ba8535fRefgit.kernel.org/stable/c/bf70e0eab64c625da84d9fdf4e84466b79418920Refgit.kernel.org/stable/c/c11dbc7705b3739974ac31a13f4ab81e61a5fb07

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53344?

CVE-2023-53344 is a medium-severity vulnerability. It was published on September 17, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53344?

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-2023-53344?

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-2023-53344?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53344 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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