CVE-2023-53537

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

State: Published
Severity: 7.8 High
Published: Oct 4, 2025
Updated: Aug 5, 2026
Reserved: Oct 4, 2025

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_submit_merged_ipu_write() missed to check validity of @bio parameter, result in submitting random cached bio which belong to other IO context, then it will cause use-after-free issue, fix it by adding additional validity check.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	0b20fcec8651569935a10afe03fedc0b812d044e to before b2f423fda64fb49213aa0ed5056079cf295a5df2Affected 0b20fcec8651569935a10afe03fedc0b812d044e to before 9a7f63283af6befc0f91d549f4f6917dff7479a9Affected 0b20fcec8651569935a10afe03fedc0b812d044e to before 7d058f0ab161437369ad6e45a4b67c2886e71373Affected 0b20fcec8651569935a10afe03fedc0b812d044e to before 97ec6f1788cc6bee3f8c89cb908e1a2a1cd859bbAffected 0b20fcec8651569935a10afe03fedc0b812d044e to before af4ce124d7bd74cb839bbdaccffbb416771a56b5Affected 0b20fcec8651569935a10afe03fedc0b812d044e to before 5cdb422c839134273866208dad5360835ddb9794Affected
LinuxLinux	5.5Affected before 5.5Not affected 5.10.180 through 5.10.Not affected 5.15.111 through 5.15.Not affected 6.1.28 through 6.1.Not affected 6.2.15 through 6.2.Not affected 6.3.2 through 6.3.*Not affected 6.4 and laterNot affected

Product

Versions

LinuxLinux

0b20fcec8651569935a10afe03fedc0b812d044e to before b2f423fda64fb49213aa0ed5056079cf295a5df2Affected
0b20fcec8651569935a10afe03fedc0b812d044e to before 9a7f63283af6befc0f91d549f4f6917dff7479a9Affected
0b20fcec8651569935a10afe03fedc0b812d044e to before 7d058f0ab161437369ad6e45a4b67c2886e71373Affected
0b20fcec8651569935a10afe03fedc0b812d044e to before 97ec6f1788cc6bee3f8c89cb908e1a2a1cd859bbAffected
0b20fcec8651569935a10afe03fedc0b812d044e to before af4ce124d7bd74cb839bbdaccffbb416771a56b5Affected
0b20fcec8651569935a10afe03fedc0b812d044e to before 5cdb422c839134273866208dad5360835ddb9794Affected

LinuxLinux

5.5Affected
before 5.5Not affected
5.10.180 through 5.10.*Not affected
5.15.111 through 5.15.*Not affected
6.1.28 through 6.1.*Not affected
6.2.15 through 6.2.*Not affected
6.3.2 through 6.3.*Not affected
6.4 and laterNot affected

References

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