What is CVE-2026-68083?

CVE-2026-68083 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.1 out of 10, affecting Linux kernel versions from 5.15 onward and patched in 6.12.97, 6.18.40, 7.1.5 and others. CVE-2026-68083 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-68083?

CVE-2026-68083 has a CVSS score of 9.1 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Is there a patch available for CVE-2026-68083?

Yes, CVE-2026-68083 has been patched. Fixed versions include 6.12.97, 6.18.40, 7.1.5 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-68083 actively exploited?

CVE-2026-68083 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-68083

Critical

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix path resolution in ksmbd_vfs_kern_path_create The SMB2 open lookup is rooted at the share with LOOKUP_BENEATH, but the create/mkdir/hardlink sink is not: ksmbd_vfs_kern_path_create() builds an absolute path with convert_to_unix_name() and resolves it from AT_FDCWD via start_creating_path(), so a ".." component is walked from the real filesystem root and escapes the export. An authenticated client races a missing path component so the rooted open lookup returns -ENOENT (taking the create branch) while the same component is present (a directory) when the create walk runs; the create then resolves ".." out of the share. Root the create walk at the share like the lookup and rename paths already are: resolve the parent with vfs_path_parent_lookup(..., LOOKUP_BENEATH, &share_conf->vfs_path) and create the final component with start_creating_noperm(). convert_to_unix_name() then has no callers and is removed.

Package Linux Kernel

Published 2026-08-10

Last modified 2026-08-17

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.1

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.15 and later are affected. Fixed in 6.12.97, 6.18.40, 7.1.5, 7.2 and their respective stable series.

Affected from

≥ 5.15

Fixed in

✓ 6.12.97 6.12.x ✓ 6.18.40 6.18.x ✓ 7.1.5 7.1.x ✓ 7.2

References

4 total

Details

CVE ID CVE-2026-68083

Severity Critical

CVSS score 9.1 / 10

CVSS version 3.1

Published 2026-08-10

Modified 2026-08-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-68083?

CVE-2026-68083 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.1 out of 10 . It affects Linux kernel versions from 5.15 onward and has been patched in 6.12.97, 6.18.40, 7.1.5 and others. CVE-2026-68083 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-68083?

CVE-2026-68083 has a CVSS score of 9.1 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
Is there a patch available for CVE-2026-68083?

Yes. CVE-2026-68083 has been patched. Fixed versions include 6.12.97, 6.18.40, 7.1.5 and others. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-68083 actively exploited?

No. CVE-2026-68083 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.