What is CVE-2025-39842?

CVE-2025-39842 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.16 onward and patched in 6.1.151, 6.6.105, 6.12.46 and others. CVE-2025-39842 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-39842?

CVE-2025-39842 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2025-39842?

Yes, CVE-2025-39842 has been patched. Fixed versions include 6.1.151, 6.6.105, 6.12.46 and others. If you are running Linux kernel 5.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-39842 actively exploited?

CVE-2025-39842 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-39842

Medium

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.

Package Linux Kernel

Published 2025-09-19

Last modified 2026-05-12

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 5.16 and later are affected. Fixed in 6.1.151, 6.6.105, 6.12.46, 6.16.6, 6.17 and their respective stable series.

Affected from

≥ 5.16

Fixed in

✓ 6.1.151 6.1.x ✓ 6.6.105 6.6.x ✓ 6.12.46 6.12.x ✓ 6.16.6 6.16.x ✓ 6.17

References

7 total

Kernel Git
https://git.kernel.org/stable/c/42c415c53ad2065088cc411d08925effa5b3d255

Patch
Kernel Git
https://git.kernel.org/stable/c/85e66331b60601d903cceaf8c10a234db863cd78

Patch
Kernel Git
https://git.kernel.org/stable/c/e9188f66e94955431ddbe2cd1cdf8ff2bb486abf

Patch
Kernel Git
https://git.kernel.org/stable/c/f46e8ef8bb7b452584f2e75337b619ac51a7cadf

Patch
Kernel Git
https://git.kernel.org/stable/c/f4a917e6cd6c798f7adf39907f117fc754db1283

Patch

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2025-39842

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-09-19

Modified 2026-05-12

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-39842?

CVE-2025-39842 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.16 onward and has been patched in 6.1.151, 6.6.105, 6.12.46 and others. CVE-2025-39842 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-39842?

CVE-2025-39842 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2025-39842?

Yes. CVE-2025-39842 has been patched. Fixed versions include 6.1.151, 6.6.105, 6.12.46 and others. If you are running Linux kernel 5.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-39842 actively exploited?

No. CVE-2025-39842 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.