Answer in brief
CVE-2023-53537 records a High severity (CVSS 7.8) vulnerability in f2fs: fix to avoid use-after-free for cached IPU bio. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0b20fcec8651569935a10afe03fedc0b812d044e <b2f423fda64fb49213aa0ed5056079cf295a5df2 || >=0b20fcec8651569935a10afe03fedc0b812d044e <9a7f63283af6befc0f91d549f4f6917dff7479a9 || >=0b20fcec8651569935a10afe03fedc0b812d044e <7d058f0ab161437369ad6e45a4b67c2886e71373 || >=0b20fcec8651569935a10afe03fedc0b812d044e <97ec6f1788cc6bee3f8c89cb908e1a2a1cd859bb || >=0b20fcec8651569935a10afe03fedc0b812d044e <af4ce124d7bd74cb839bbdaccffbb416771a56b5 || >=0b20fcec8651569935a10afe03fedc0b812d044e <5cdb422c839134273866208dad5360835ddb9794 | b2f423fda64fb49213aa0ed5056079cf295a5df2, 9a7f63283af6befc0f91d549f4f6917dff7479a9, 7d058f0ab161437369ad6e45a4b67c2886e71373, 97ec6f1788cc6bee3f8c89cb908e1a2a1cd859bb, af4ce124d7bd74cb839bbdaccffbb416771a56b5, 5cdb422c839134273866208dad5360835ddb9794 |
| Linux/Linuxgeneric | 5.5 | Not reported |
Published upstream
Oct 4, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
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.
Quoted source text, attributed separately from HOL analysis.