CVE-2025-39842

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/42c415c53ad2065088cc411d08925effa5b3d255	Patch
https://git.kernel.org/stable/c/85e66331b60601d903cceaf8c10a234db863cd78	Patch
https://git.kernel.org/stable/c/e9188f66e94955431ddbe2cd1cdf8ff2bb486abf	Patch
https://git.kernel.org/stable/c/f46e8ef8bb7b452584f2e75337b619ac51a7cadf	Patch
https://git.kernel.org/stable/c/f4a917e6cd6c798f7adf39907f117fc754db1283	Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Third Party Advisory Mailing List

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc2::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc3::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc4::::::

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

History

No history.

Information

Published : 2025-09-19 16:15

Updated : 2026-01-20 15:26

NVD link : CVE-2025-39842

Mitre link : CVE-2025-39842

CVE.ORG link : CVE-2025-39842

JSON object : View

Products Affected

debian

debian_linux

linux

linux_kernel

CWE

NVD-CWE-noinfo

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