Answer in brief
CVE-2024-44939 records a Unknown severity vulnerability in jfs: fix null ptr deref in dtInsertEntry. 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f98bf80b20f4a930589cda48a35f751a64fe0dc2 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <53023ab11836ac56fd75f7a71ec1356e50920fa9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6ea10dbb1e6c58384136e9adfd75f81951e423f6 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9c2ac38530d1a3ee558834dfa16c85a40fd0e702 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ce6dede912f064a855acf6f04a04cbb2c25b8c8c | f98bf80b20f4a930589cda48a35f751a64fe0dc2, 53023ab11836ac56fd75f7a71ec1356e50920fa9, 6ea10dbb1e6c58384136e9adfd75f81951e423f6, 9c2ac38530d1a3ee558834dfa16c85a40fd0e702, ce6dede912f064a855acf6f04a04cbb2c25b8c8c |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Aug 26, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: jfs: fix null ptr deref in dtInsertEntry [syzbot reported] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 5061 Comm: syz-executor404 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:dtInsertEntry+0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713 ... [Analyze] In dtInsertEntry(), when the pointer h has the same value as p, after writing name in UniStrncpy_to_le(), p->header.flag will be cleared. This will cause the previously true judgment "p->header.flag & BT-LEAF" to change to no after writing the name operation, this leads to entering an incorrect branch and accessing the uninitialized object ih when judging this condition for the second time. [Fix] After got the page, check freelist first, if freelist == 0 then exit dtInsert() and return -EINVAL.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2024-44939 records a Unknown severity vulnerability in jfs: fix null ptr deref in dtInsertEntry. 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.
A CVSS score is not reported in the current record. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f98bf80b20f4a930589cda48a35f751a64fe0dc2 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <53023ab11836ac56fd75f7a71ec1356e50920fa9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6ea10dbb1e6c58384136e9adfd75f81951e423f6 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9c2ac38530d1a3ee558834dfa16c85a40fd0e702 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ce6dede912f064a855acf6f04a04cbb2c25b8c8c | f98bf80b20f4a930589cda48a35f751a64fe0dc2, 53023ab11836ac56fd75f7a71ec1356e50920fa9, 6ea10dbb1e6c58384136e9adfd75f81951e423f6, 9c2ac38530d1a3ee558834dfa16c85a40fd0e702, ce6dede912f064a855acf6f04a04cbb2c25b8c8c |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Aug 26, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: jfs: fix null ptr deref in dtInsertEntry [syzbot reported] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 5061 Comm: syz-executor404 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:dtInsertEntry+0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713 ... [Analyze] In dtInsertEntry(), when the pointer h has the same value as p, after writing name in UniStrncpy_to_le(), p->header.flag will be cleared. This will cause the previously true judgment "p->header.flag & BT-LEAF" to change to no after writing the name operation, this leads to entering an incorrect branch and accessing the uninitialized object ih when judging this condition for the second time. [Fix] After got the page, check freelist first, if freelist == 0 then exit dtInsert() and return -EINVAL.
Quoted source text, attributed separately from HOL analysis.