CVE-2025-38337
published 2025-07-10CVE-2025-38337: In the Linux kernel, the following vulnerability has been resolved: jbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata() Since…
medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
In the Linux kernel, the following vulnerability has been resolved:
jbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata()
Since handle->h_transaction may be a NULL pointer, so we should change it
to call is_handle_aborted(handle) first before dereferencing it.
And the following data-race was reported in my fuzzer:
BUG: KCSAN: data-race in jbd2_journal_dirty_metadata / jbd2_journal_dirty_metadata
write to 0xffff888011024104 of 4 bytes by task 10881 on cpu 1:
jbd2_journal_dirty_metadata+0x2a5/0x770 fs/jbd2/transaction.c:1556
__ext4_handle_dirty_metadata+0xe7/0x4b0 fs/ext4/ext4_jbd2.c:358
ext4_do_update_inode fs/ext4/inode.c:5220 [inline]
ext4_mark_iloc_dirty+0x32c/0xd50 fs/ext4/inode.c:5869
__ext4_mark_inode_dirty+0xe1/0x450 fs/ext4/inode.c:6074
ext4_dirty_inode+0x98/0xc0 fs/ext4/inode.c:6103
....
read to 0xffff888011024104 of 4 bytes by task 10880 on cpu 0:
jbd2_journal_dirty_metadata+0xf2/0x770 fs/jbd2/transaction.c:1512
__ext4_handle_dirty_metadata+0xe7/0x4b0 fs/ext4/ext4_jbd2.c:358
ext4_do_update_inode fs/ext4/inode.c:5220 [inline]
ext4_mark_iloc_dirty+0x32c/0xd50 fs/ext4/inode.c:5869
__ext4_mark_inode_dirty+0xe1/0x450 fs/ext4/inode.c:6074
ext4_dirty_inode+0x98/0xc0 fs/ext4/inode.c:6103
....
value changed: 0x00000000 -> 0x00000001
This issue is caused by missing data-race annotation for jh->b_modified.
Therefore, the missing annotation needs to be added.
Affected
35 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | linux | < linux 6.1.147-1 (bookworm) | linux 6.1.147-1 (bookworm) |
| debian | linux-6.1 | < linux 6.1.147-1 (bookworm) | linux 6.1.147-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 6e06ae88edae77379bef7c0cb7d3c2dd88676867 < 5c1a34ff5b0bfdfd2f9343aa9b08d25df618bac5 | 5c1a34ff5b0bfdfd2f9343aa9b08d25df618bac5 |
| linux | linux | >= 6e06ae88edae77379bef7c0cb7d3c2dd88676867 < ec669e5bf409f16e464bfad75f0ba039a45de29a | ec669e5bf409f16e464bfad75f0ba039a45de29a |
| linux | linux | >= 6e06ae88edae77379bef7c0cb7d3c2dd88676867 < 43d5e3bb5f1dcd91e30238ea0b59a5f77063f84e | 43d5e3bb5f1dcd91e30238ea0b59a5f77063f84e |
| linux | linux | >= 6e06ae88edae77379bef7c0cb7d3c2dd88676867 < 23361b479f2700c00960d3ae9cdc8ededa762d47 | 23361b479f2700c00960d3ae9cdc8ededa762d47 |
| linux | linux | >= 6e06ae88edae77379bef7c0cb7d3c2dd88676867 < 2e7c64d7a92c031d016f11c8e8cb05131ab7b75a | 2e7c64d7a92c031d016f11c8e8cb05131ab7b75a |
| linux | linux | >= 6e06ae88edae77379bef7c0cb7d3c2dd88676867 < f78b38af3540b4875147b7b884ee11a27b3dbf4c | f78b38af3540b4875147b7b884ee11a27b3dbf4c |
| linux | linux | >= 6e06ae88edae77379bef7c0cb7d3c2dd88676867 < a377996d714afb8d4d5f4906336f78510039da29 | a377996d714afb8d4d5f4906336f78510039da29 |
| linux | linux | >= 6e06ae88edae77379bef7c0cb7d3c2dd88676867 < af98b0157adf6504fade79b3e6cb260c4ff68e37 | af98b0157adf6504fade79b3e6cb260c4ff68e37 |
| linux | linux_kernel | >= 0 < 5.10.244-1 | 5.10.244-1 |
| linux | linux_kernel | >= 0 < 6.1.147-1 | 6.1.147-1 |
| linux | linux_kernel | >= 0 < 6.12.35-1 | 6.12.35-1 |
| linux | linux_kernel | >= 0 < 6.12.35-1 | 6.12.35-1 |
| linux | linux_kernel | >= 0 < 5.15.0-156.166 | 5.15.0-156.166 |
| linux | linux_kernel | >= 0 < 6.8.0-100.100 | 6.8.0-100.100 |
| linux | linux_kernel | >= 4.3 < 5.4.295 | 5.4.295 |
| linux | linux_kernel | >= 5.11 < 5.15.186 | 5.15.186 |
| linux | linux_kernel | >= 5.16 < 6.1.142 | 6.1.142 |
| linux | linux_kernel | >= 5.5 < 5.10.239 | 5.10.239 |
| linux | linux_kernel | >= 6.13 < 6.15.4 | 6.15.4 |
| linux | linux_kernel | >= 6.2 < 6.6.95 | 6.6.95 |
| linux | linux_kernel | >= 6.7 < 6.12.35 | 6.12.35 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.6MEDIUM