CVE-2025-39842 Details
Description
In the Linux kernel, the following vulnerability has been resolved: ocfs2: prevent release journal inode after journal shutdown Before calling ocfs2_delete_osb(), ocfs2_journal_shutdown() has already been executed in ocfs2_dismount_volume(), so osb->journal must be NULL. Therefore, the following calltrace will inevitably fail when it reaches jbd2_journal_release_jbd_inode(). ocfs2_dismount_volume()-> ocfs2_delete_osb()-> ocfs2_free_slot_info()-> __ocfs2_free_slot_info()-> evict()-> ocfs2_evict_inode()-> ocfs2_clear_inode()-> jbd2_journal_release_jbd_inode(osb->journal->j_journal, Adding osb->journal checks will prevent null-ptr-deref during the above execution path.
A vulnerability in the OCFS2 file system of the Linux kernel can lead to a null pointer dereference. This issue occurs because the journal shutdown process is not properly synchronized with the deletion of the OSB (Object Super Block) structure. As a result, when the system attempts to release the journal inode after the journal has been shut down, it encounters a null reference, causing a crash. The vulnerability affects several versions of the Linux kernel.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://cert-portal.siemens.com/productcert/html/ssa-032379.html | siemens-SADP | |
| https://git.kernel.org/stable/c/42c415c53ad2065088cc411d08925effa5b3d255 | kernel.org | Patch |
| https://git.kernel.org/stable/c/85e66331b60601d903cceaf8c10a234db863cd78 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e9188f66e94955431ddbe2cd1cdf8ff2bb486abf | kernel.org | Patch |
| https://git.kernel.org/stable/c/f46e8ef8bb7b452584f2e75337b619ac51a7cadf | kernel.org | Patch |
| https://git.kernel.org/stable/c/f4a917e6cd6c798f7adf39907f117fc754db1283 | kernel.org | Patch |
| https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html | CVE | Mailing ListThird Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.16, < 6.1.151 >= 6.2, < 6.6.105 >= 6.7, < 6.12.46 >= 6.13, < 6.16.6 6.17 rc1 6.17 rc2 6.17 rc3 6.17 rc4 |
CPE
Remediation
| |
| debian debian linux | 11.0 |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | siemens-SADP |
| May 12, 2026 | CVE Modified | siemens-SADP |
| Jan 20, 2026 | Initial Analysis | [email protected] |
| Nov 3, 2025 | CVE Modified | CVE |
| Sep 19, 2025 | New CVE Received | kernel.org |