What is CVE-2026-46195?

CVE-2026-46195 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 5.12 onward and patched in 5.15.210, 6.1.176, 6.6.140 and others. CVE-2026-46195 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46195?

CVE-2026-46195 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-46195?

Yes, CVE-2026-46195 has been patched. Fixed versions include 5.15.210, 6.1.176, 6.6.140 and others. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46195 actively exploited?

CVE-2026-46195 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2026-46195

Critical

In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building DACL pointers parse_sec_desc(), build_sec_desc(), and the chown path in id_mode_to_cifs_acl() all add the server-supplied dacloffset to pntsd before proving a DACL header fits inside the returned security descriptor. On 32-bit builds a malicious server can return dacloffset near U32_MAX, wrap the derived DACL pointer below end_of_acl, and then slip past the later pointer-based bounds checks. build_sec_desc() and id_mode_to_cifs_acl() can then dereference DACL fields from the wrapped pointer in the chmod/chown rewrite paths. Validate dacloffset numerically before building any DACL pointer and reuse the same helper at the three DACL entry points.

Package Linux Kernel

Published 2026-05-28

Last modified 2026-07-15

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-476

CVE-2026-46195 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.12 and later are affected. Fixed in 5.15.210, 6.1.176, 6.6.140, 6.12.88, 6.18.30, 7.0.7, 7.1 and their respective stable series.

Affected from

≥ 5.12

Fixed in

✓ 5.15.210 5.15.x ✓ 6.1.176 6.1.x ✓ 6.6.140 6.6.x ✓ 6.12.88 6.12.x ✓ 6.18.30 6.18.x ✓ 7.0.7 7.0.x ✓ 7.1

References

13 total

Kernel Git
https://git.kernel.org/stable/c/3b1ddba19e77ee35241cd27f16dc3e8d14e08db7

Patch
Kernel Git
https://git.kernel.org/stable/c/8bd07e417b6bda67e317920584e48cb6ee442a8a

Patch
Kernel Git
https://git.kernel.org/stable/c/ba7f71b6161c0943dafc367565e5843d16b7d505

Patch
Kernel Git
https://git.kernel.org/stable/c/c688f3ed73d31943334ad2139cb02ec49664322a

Patch
Kernel Git
https://git.kernel.org/stable/c/f98b48151cc502ada59d9778f0112d21f2586ca3

Patch

Showing 5 of 13 references View all on NVD

Details

CVE ID CVE-2026-46195

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2026-05-28

Modified 2026-07-15

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-46195?

CVE-2026-46195 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 5.12 onward and has been patched in 5.15.210, 6.1.176, 6.6.140 and others. CVE-2026-46195 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-46195?

CVE-2026-46195 has a CVSS score of 9.8 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:H/I:H/A:H.
Is there a patch available for CVE-2026-46195?

Yes. CVE-2026-46195 has been patched. Fixed versions include 5.15.210, 6.1.176, 6.6.140 and others. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46195 actively exploited?

No. CVE-2026-46195 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.