Answer in brief
CVE-2025-38337 records a Medium severity (CVSS 5.5) vulnerability in jbd2: fix data-race and null-ptr-deref in jbd2_journal_dirty_metadata(). 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:debian:debian_linux:11.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | 4.3 | Not reported |
| Linux/Linuxgeneric | >=6e06ae88edae77379bef7c0cb7d3c2dd88676867 <5c1a34ff5b0bfdfd2f9343aa9b08d25df618bac5 || >=6e06ae88edae77379bef7c0cb7d3c2dd88676867 <ec669e5bf409f16e464bfad75f0ba039a45de29a || >=6e06ae88edae77379bef7c0cb7d3c2dd88676867 <43d5e3bb5f1dcd91e30238ea0b59a5f77063f84e || >=6e06ae88edae77379bef7c0cb7d3c2dd88676867 <23361b479f2700c00960d3ae9cdc8ededa762d47 || >=6e06ae88edae77379bef7c0cb7d3c2dd88676867 <2e7c64d7a92c031d016f11c8e8cb05131ab7b75a || >=6e06ae88edae77379bef7c0cb7d3c2dd88676867 <f78b38af3540b4875147b7b884ee11a27b3dbf4c || >=6e06ae88edae77379bef7c0cb7d3c2dd88676867 <a377996d714afb8d4d5f4906336f78510039da29 || >=6e06ae88edae77379bef7c0cb7d3c2dd88676867 <af98b0157adf6504fade79b3e6cb260c4ff68e37 | 5c1a34ff5b0bfdfd2f9343aa9b08d25df618bac5, ec669e5bf409f16e464bfad75f0ba039a45de29a, 43d5e3bb5f1dcd91e30238ea0b59a5f77063f84e, 23361b479f2700c00960d3ae9cdc8ededa762d47, 2e7c64d7a92c031d016f11c8e8cb05131ab7b75a, f78b38af3540b4875147b7b884ee11a27b3dbf4c, a377996d714afb8d4d5f4906336f78510039da29, af98b0157adf6504fade79b3e6cb260c4ff68e37 |
Published upstream
Jul 10, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.