Answer in brief
CVE-2023-53149 records a Medium severity (CVSS 5.5) vulnerability in ext4: avoid deadlock in fs reclaim with page writeback. 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 5.5. 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 |
| cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c8585c6fcaf2011de54c3592e80a634a2b9e1a7f <385b49a1f34b26f62e3834c773560b120825b6f8 || >=c8585c6fcaf2011de54c3592e80a634a2b9e1a7f <2ec97dc90df40c50e509809dc9a198638a7e18b6 || >=c8585c6fcaf2011de54c3592e80a634a2b9e1a7f <4b4340bf04ce9a52061f15000ecedd126abc093c || >=c8585c6fcaf2011de54c3592e80a634a2b9e1a7f <00d873c17e29cc32d90ca852b82685f1673acaa5 | 385b49a1f34b26f62e3834c773560b120825b6f8, 2ec97dc90df40c50e509809dc9a198638a7e18b6, 4b4340bf04ce9a52061f15000ecedd126abc093c, 00d873c17e29cc32d90ca852b82685f1673acaa5 |
| Linux/Linuxgeneric | 4.7 | Not reported |
Published upstream
Sep 15, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 30, 2026
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid deadlock in fs reclaim with page writeback Ext4 has a filesystem wide lock protecting ext4_writepages() calls to avoid races with switching of journalled data flag or inode format. This lock can however cause a deadlock like: CPU0 CPU1 ext4_writepages() percpu_down_read(sbi->s_writepages_rwsem); ext4_change_inode_journal_flag() percpu_down_write(sbi->s_writepages_rwsem); - blocks, all readers block from now on ext4_do_writepages() ext4_init_io_end() kmem_cache_zalloc(io_end_cachep, GFP_KERNEL) fs_reclaim frees dentry... dentry_unlink_inode() iput() - last ref => iput_final() - inode dirty => write_inode_now()... ext4_writepages() tries to acquire sbi->s_writepages_rwsem and blocks forever Make sure we cannot recurse into filesystem reclaim from writeback code to avoid the deadlock.
Quoted source text, attributed separately from HOL analysis.