CVE-2024-44939jfs: fix null ptr deref in dtInsertEntry
- 7.8HighCVSS base score
- 0.25%Exploitation in 30 daysEPSS · top 84% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 24 months later
· 24 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.25% · top 84% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < f98bf80b20f4a930589cda48a35f751a64fe0dc2
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 53023ab11836ac56fd75f7a71ec1356e50920fa9
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 6ea10dbb1e6c58384136e9adfd75f81951e423f6
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 9c2ac38530d1a3ee558834dfa16c85a40fd0e702
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < ce6dede912f064a855acf6f04a04cbb2c25b8c8c
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 5.15.189 – ≤ 5.15.*
- unaffected 6.1.107 – ≤ 6.1.*
- unaffected 6.6.47 – ≤ 6.6.*
- unaffected 6.10.6 – ≤ 6.10.*
- unaffected 6.11 – ≤ *
References
References6
- https://git.kernel.org/stable/c/f98bf80b20f4a930589cda48a35f751a64fe0dc2 (opens in a new tab)
- https://git.kernel.org/stable/c/53023ab11836ac56fd75f7a71ec1356e50920fa9 (opens in a new tab)
- https://git.kernel.org/stable/c/6ea10dbb1e6c58384136e9adfd75f81951e423f6 (opens in a new tab)
- https://git.kernel.org/stable/c/9c2ac38530d1a3ee558834dfa16c85a40fd0e702 (opens in a new tab)
- https://git.kernel.org/stable/c/ce6dede912f064a855acf6f04a04cbb2c25b8c8c (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-41151 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-44939)Record last updated .