ext4
by Linux
Source repositories
CVEs (56)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2026-43067 | Cri | 0.57 | 9.8 | 0.00 | May 5, 2026 | In the Linux kernel, the following vulnerability has been resolved: ext4: handle wraparound when searching for blocks for indirect mapped blocks Commit 4865c768b563 ("ext4: always allocate blocks only from groups inode can use") restricts what blocks will be allocated for… | ||
| CVE-2026-31448 | Cri | 0.54 | 9.4 | 0.00 | Apr 22, 2026 | In the Linux kernel, the following vulnerability has been resolved: ext4: avoid infinite loops caused by residual data On the mkdir/mknod path, when mapping logical blocks to physical blocks, if inserting a new extent into the extent tree fails (in this example, because the… | ||
| CVE-2022-50286 | Hig | 0.51 | 7.8 | 0.00 | Sep 15, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix delayed allocation bug in ext4_clu_mapped for bigalloc + inline When converting files with inline data to extents, delayed allocations made on a file system created with both the bigalloc and inline… | ||
| CVE-2022-50021 | Hig | 0.51 | 7.8 | 0.00 | Jun 18, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: block range must be validated before use in ext4_mb_clear_bb() Block range to free is validated in ext4_free_blocks() using ext4_inode_block_valid() and then it's passed to ext4_mb_clear_bb(). However in… | ||
| CVE-2023-53100 | Hig | 0.51 | 7.8 | 0.00 | May 2, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix WARNING in ext4_update_inline_data Syzbot found the following issue: EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. fscrypt:… | ||
| CVE-2025-23150 | Hig | 0.51 | 7.8 | 0.00 | May 1, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix off-by-one error in do_split Syzkaller detected a use-after-free issue in ext4_insert_dentry that was caused by out-of-bounds access due to incorrect splitting in do_split. BUG: KASAN:… | ||
| CVE-2022-49174 | Hig | 0.51 | 7.8 | 0.00 | Feb 26, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix ext4_mb_mark_bb() with flex_bg with fast_commit In case of flex_bg feature (which is by default enabled), extents for any given inode might span across blocks from two different block group.… | ||
| CVE-2024-49983 | Hig | 0.51 | 7.8 | 0.00 | Oct 21, 2024 | In the Linux kernel, the following vulnerability has been resolved: ext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free When calling ext4_force_split_extent_at() in ext4_ext_replay_update_ex(), the 'ppath' is updated but it is the 'path' that is freed, thus… | ||
| CVE-2024-49960 | Hig | 0.51 | 7.8 | 0.00 | Oct 21, 2024 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix timer use-after-free on failed mount Syzbot has found an ODEBUG bug in ext4_fill_super The del_timer_sync function cancels the s_err_report timer, which reminds about filesystem errors daily. We… | ||
| CVE-2025-22121 | Hig | 0.48 | 8.4 | 0.00 | Apr 16, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() There's issue as follows: BUG: KASAN: use-after-free in ext4_xattr_inode_dec_ref_all+0x6ff/0x790 Read of size 4 at addr ffff88807b003000 by task… | ||
| CVE-2022-50082 | Hig | 0.46 | 7.0 | 0.00 | Jun 18, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix warning in ext4_iomap_begin as race between bmap and write We got issue as follows: ------------[ cut here ]------------ WARNING: CPU: 3 PID: 9310 at fs/ext4/inode.c:3441 ext4_iomap_begin+0x182/0x5d0… | ||
| CVE-2026-45942 | Hig | 0.44 | 7.8 | 0.00 | May 27, 2026 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix e4b bitmap inconsistency reports A bitmap inconsistency issue was observed during stress tests under mixed huge-page workloads. Ext4 reported multiple e4b bitmap check failures like: … | ||
| CVE-2026-31446 | Hig | 0.44 | 7.8 | 0.00 | Apr 22, 2026 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix use-after-free in update_super_work when racing with umount Commit b98535d09179 ("ext4: fix bug_on in start_this_handle during umount filesystem") moved ext4_unregister_sysfs() before flushing… | ||
| CVE-2022-50673 | Hig | 0.44 | 7.8 | 0.00 | Dec 9, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix use-after-free in ext4_orphan_cleanup I caught a issue as follows: ================================================================== BUG: KASAN: use-after-free in __list_add_valid+0x28/0x1a0 Read… | ||
| CVE-2025-40190 | Hig | 0.44 | 7.8 | 0.00 | Nov 12, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: guard against EA inode refcount underflow in xattr update syzkaller found a path where ext4_xattr_inode_update_ref() reads an EA inode refcount that is already <= 0 and then applies ref_change (often… | ||
| CVE-2025-40167 | Hig | 0.44 | 7.8 | 0.00 | Nov 12, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: detect invalid INLINE_DATA + EXTENTS flag combination syzbot reported a BUG_ON in ext4_es_cache_extent() when opening a verity file on a corrupted ext4 filesystem mounted without a journal. The issue is… | ||
| CVE-2025-37785 | Hig | 0.44 | 7.8 | 0.00 | Apr 18, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix OOB read when checking dotdot dir Mounting a corrupted filesystem with directory which contains '.' dir entry with rec_len == block size results in out-of-bounds read (later on, when the corrupted… | ||
| CVE-2024-49884 | Hig | 0.44 | 7.8 | 0.00 | Oct 21, 2024 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix slab-use-after-free in ext4_split_extent_at() We hit the following use-after-free: ================================================================== BUG: KASAN: slab-use-after-free in… | ||
| CVE-2024-49882 | Hig | 0.44 | 7.8 | 0.00 | Oct 21, 2024 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix double brelse() the buffer of the extents path In ext4_ext_try_to_merge_up(), set path[1].p_bh to NULL after it has been released, otherwise it may be released twice. An example of what triggers this… | ||
| CVE-2022-50668 | Hig | 0.42 | 7.5 | 0.01 | Dec 9, 2025 | In the Linux kernel, the following vulnerability has been resolved: ext4: fix deadlock due to mbcache entry corruption When manipulating xattr blocks, we can deadlock infinitely looping inside ext4_xattr_block_set() where we constantly keep finding xattr block for reuse in… |
- risk 0.57cvss 9.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: handle wraparound when searching for blocks for indirect mapped blocks Commit 4865c768b563 ("ext4: always allocate blocks only from groups inode can use") restricts what blocks will be allocated for…
- risk 0.54cvss 9.4epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: avoid infinite loops caused by residual data On the mkdir/mknod path, when mapping logical blocks to physical blocks, if inserting a new extent into the extent tree fails (in this example, because the…
- risk 0.51cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix delayed allocation bug in ext4_clu_mapped for bigalloc + inline When converting files with inline data to extents, delayed allocations made on a file system created with both the bigalloc and inline…
- risk 0.51cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: block range must be validated before use in ext4_mb_clear_bb() Block range to free is validated in ext4_free_blocks() using ext4_inode_block_valid() and then it's passed to ext4_mb_clear_bb(). However in…
- risk 0.51cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix WARNING in ext4_update_inline_data Syzbot found the following issue: EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. fscrypt:…
- risk 0.51cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix off-by-one error in do_split Syzkaller detected a use-after-free issue in ext4_insert_dentry that was caused by out-of-bounds access due to incorrect splitting in do_split. BUG: KASAN:…
- risk 0.51cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix ext4_mb_mark_bb() with flex_bg with fast_commit In case of flex_bg feature (which is by default enabled), extents for any given inode might span across blocks from two different block group.…
- risk 0.51cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: drop ppath from ext4_ext_replay_update_ex() to avoid double-free When calling ext4_force_split_extent_at() in ext4_ext_replay_update_ex(), the 'ppath' is updated but it is the 'path' that is freed, thus…
- risk 0.51cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix timer use-after-free on failed mount Syzbot has found an ODEBUG bug in ext4_fill_super The del_timer_sync function cancels the s_err_report timer, which reminds about filesystem errors daily. We…
- risk 0.48cvss 8.4epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix out-of-bound read in ext4_xattr_inode_dec_ref_all() There's issue as follows: BUG: KASAN: use-after-free in ext4_xattr_inode_dec_ref_all+0x6ff/0x790 Read of size 4 at addr ffff88807b003000 by task…
- risk 0.46cvss 7.0epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix warning in ext4_iomap_begin as race between bmap and write We got issue as follows: ------------[ cut here ]------------ WARNING: CPU: 3 PID: 9310 at fs/ext4/inode.c:3441 ext4_iomap_begin+0x182/0x5d0…
- risk 0.44cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix e4b bitmap inconsistency reports A bitmap inconsistency issue was observed during stress tests under mixed huge-page workloads. Ext4 reported multiple e4b bitmap check failures like: …
- risk 0.44cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix use-after-free in update_super_work when racing with umount Commit b98535d09179 ("ext4: fix bug_on in start_this_handle during umount filesystem") moved ext4_unregister_sysfs() before flushing…
- risk 0.44cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix use-after-free in ext4_orphan_cleanup I caught a issue as follows: ================================================================== BUG: KASAN: use-after-free in __list_add_valid+0x28/0x1a0 Read…
- risk 0.44cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: guard against EA inode refcount underflow in xattr update syzkaller found a path where ext4_xattr_inode_update_ref() reads an EA inode refcount that is already <= 0 and then applies ref_change (often…
- risk 0.44cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: detect invalid INLINE_DATA + EXTENTS flag combination syzbot reported a BUG_ON in ext4_es_cache_extent() when opening a verity file on a corrupted ext4 filesystem mounted without a journal. The issue is…
- risk 0.44cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix OOB read when checking dotdot dir Mounting a corrupted filesystem with directory which contains '.' dir entry with rec_len == block size results in out-of-bounds read (later on, when the corrupted…
- risk 0.44cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix slab-use-after-free in ext4_split_extent_at() We hit the following use-after-free: ================================================================== BUG: KASAN: slab-use-after-free in…
- risk 0.44cvss 7.8epss 0.00
In the Linux kernel, the following vulnerability has been resolved: ext4: fix double brelse() the buffer of the extents path In ext4_ext_try_to_merge_up(), set path[1].p_bh to NULL after it has been released, otherwise it may be released twice. An example of what triggers this…
- risk 0.42cvss 7.5epss 0.01
In the Linux kernel, the following vulnerability has been resolved: ext4: fix deadlock due to mbcache entry corruption When manipulating xattr blocks, we can deadlock infinitely looping inside ext4_xattr_block_set() where we constantly keep finding xattr block for reuse in…
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