What is CVE-2026-46181?

CVE-2026-46181 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 4.9 onward and patched in 6.18.30, 7.0.7 and 7.1. CVE-2026-46181 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46181?

CVE-2026-46181 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-46181?

Yes, CVE-2026-46181 has been patched. Fixed versions include 6.18.30, 7.0.7 and 7.1. If you are running Linux kernel 4.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46181 actively exploited?

CVE-2026-46181 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-46181

High

In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() Sashiko points out the radix_tree itself is RCU safe, but nothing ever frees the mlx4_srq struct with RCU, and it isn't even accessed within the RCU critical section. It also will crash if an event is delivered before the srq object is finished initializing. Use the spinlock since it isn't easy to make RCU work, use refcount_inc_not_zero() to protect against partially initialized objects, and order the refcount_set() to be after the srq is fully initialized.

Package Linux Kernel

Published 2026-05-28

Last modified 2026-07-20

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-366

CVE-2026-46181 is classified as CWE-366

See CWE-366 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 4.9 and later are affected. Fixed in 6.18.30, 7.0.7, 7.1 and their respective stable series.

Affected from

≥ 4.9

Fixed in

✓ 6.18.30 6.18.x ✓ 7.0.7 7.0.x ✓ 7.1

References

18 total

Kernel Git
https://git.kernel.org/stable/c/1e2a44875b6afb4add1115f7f3351dcbeb6f273d

Patch
Kernel Git
https://git.kernel.org/stable/c/8b7833f3bce35cb0d01c1503781523c099c675f0

Patch
Kernel Git
https://git.kernel.org/stable/c/c9341307ea16b9395c2e4c9c94d8499d91fe31d0

Patch
Red Hat
https://access.redhat.com/errata/RHSA-2026:25120
Red Hat
https://access.redhat.com/errata/RHSA-2026:25121

Showing 5 of 18 references View all on NVD

Details

CVE ID CVE-2026-46181

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-05-28

Modified 2026-07-20

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-46181?

CVE-2026-46181 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 4.9 onward and has been patched in 6.18.30, 7.0.7 and 7.1. CVE-2026-46181 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-46181?

CVE-2026-46181 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-46181?

Yes. CVE-2026-46181 has been patched. Fixed versions include 6.18.30, 7.0.7 and 7.1. If you are running Linux kernel 4.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46181 actively exploited?

No. CVE-2026-46181 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.