n 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.
Configuration 1 (hide)
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25 Nov 2025, 17:03
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:6.4:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| CWE | CWE-667 | |
| References | () https://git.kernel.org/stable/c/00d873c17e29cc32d90ca852b82685f1673acaa5 - Patch | |
| References | () https://git.kernel.org/stable/c/2ec97dc90df40c50e509809dc9a198638a7e18b6 - Patch | |
| References | () https://git.kernel.org/stable/c/4b4340bf04ce9a52061f15000ecedd126abc093c - Patch |
15 Sep 2025, 15:22
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Published : 2025-09-15 14:15
Updated : 2025-11-25 17:03
NVD link : CVE-2023-53149
Mitre link : CVE-2023-53149
CVE.ORG link : CVE-2023-53149
JSON object : View
Improper Locking