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CVE-2023-53537

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid use-after-free for cached IPU bio xfstest generic/019 reports a bug: kernel BUG at mm/filemap.c:1619!

Published Oct 4, 2025CWE-416EPSS 0.16%

Overview

CVE-2023-53537 is a high-severity vulnerability. It was published on October 4, 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:

f2fs: fix to avoid use-after-free for cached IPU bio

xfstest generic/019 reports a bug:

kernel BUG at mm/filemap.c:1619!

RIP: 0010:folio_end_writeback+0x8a/0x90

Call Trace:

end_page_writeback+0x1c/0x60

f2fs_write_end_io+0x199/0x420

bio_endio+0x104/0x180

submit_bio_noacct+0xa5/0x510

submit_bio+0x48/0x80

f2fs_submit_write_bio+0x35/0x300

f2fs_submit_merged_ipu_write+0x2a0/0x2b0

f2fs_write_single_data_page+0x838/0x8b0

f2fs_write_cache_pages+0x379/0xa30

f2fs_write_data_pages+0x30c/0x340

do_writepages+0xd8/0x1b0

__writeback_single_inode+0x44/0x370

writeback_sb_inodes+0x233/0x4d0

__writeback_inodes_wb+0x56/0xf0

wb_writeback+0x1dd/0x2d0

wb_workfn+0x367/0x4a0

process_one_work+0x21d/0x430

worker_thread+0x4e/0x3c0

kthread+0x103/0x130

ret_from_fork+0x2c/0x50

The root cause is: after cp_error is set, f2fs_submit_merged_ipu_write()

in f2fs_write_single_data_page() tries to flush IPU bio in cache, however

f2fs

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/5cdb422c839134273866208dad5360835ddb9794Refgit.kernel.org/stable/c/7d058f0ab161437369ad6e45a4b67c2886e71373Refgit.kernel.org/stable/c/97ec6f1788cc6bee3f8c89cb908e1a2a1cd859bbRefgit.kernel.org/stable/c/9a7f63283af6befc0f91d549f4f6917dff7479a9Refgit.kernel.org/stable/c/af4ce124d7bd74cb839bbdaccffbb416771a56b5Refgit.kernel.org/stable/c/b2f423fda64fb49213aa0ed5056079cf295a5df2

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53537?

CVE-2023-53537 is a high-severity vulnerability. It was published on October 4, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-53537?

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-2023-53537?

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-2023-53537?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53537 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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