What is CVE-2026-46314?

CVE-2026-46314 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Infinite Loop flaw (CWE-835), affecting Linux kernel versions from 5.16 onward and patched in 6.1.176, 6.18.33, 7.0.9 and others. CVE-2026-46314 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46314?

CVE-2026-46314 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-2026-46314?

Yes, CVE-2026-46314 has been patched. Fixed versions include 6.1.176, 6.18.33, 7.0.9 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-2026-46314 actively exploited?

CVE-2026-46314 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Infinite Loop (CWE-835)?

The product contains an iteration that does not exit even when it should. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/835.html

CVE-2026-46314

Medium

In the Linux kernel, the following vulnerability has been resolved: drm/v3d: Reject empty multisync extension to prevent infinite loop v3d_get_extensions() walks a userspace-provided singly-linked list of ioctl extensions without any bound on the chain length. A local user can craft a self-referential extension (ext->next == &ext) with zero in_sync_count and out_sync_count, which bypasses the existing duplicate- extension guard: if (se->in_sync_count || se->out_sync_count) return -EINVAL; The guard never fires because v3d_get_multisync_post_deps() returns immediately when count is zero, leaving both fields at zero on every iteration. The result is an infinite loop in kernel context, blocking the calling thread and pegging a CPU core indefinitely. Fix this by rejecting a multisync extension where both in_sync_count and out_sync_count are zero in v3d_get_multisync_submit_deps(). An empty multisync carries no synchronization information and serves no useful purpose, so returning -EINVAL for such an extension is the correct defense against this attack vector.

Package Linux Kernel

Published 2026-06-08

Last modified 2026-07-23

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

Weakness type

CWE-835

CVE-2026-46314 is a Infinite Loop vulnerability

What is Infinite Loop?

The product contains an iteration that does not exit even when it should. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.16 and later are affected. Fixed in 6.1.176, 6.18.33, 7.0.9, 7.1 and their respective stable series.

Affected from

≥ 5.16

Fixed in

✓ 6.1.176 6.1.x ✓ 6.18.33 6.18.x ✓ 7.0.9 7.0.x ✓ 7.1

References

4 total

Kernel Git
https://git.kernel.org/stable/c/309abbddeca0c12714721928a819ef45e5710998

Patch
Kernel Git
https://git.kernel.org/stable/c/4fa42a249e8cd6ed17aea04e5695b6e9001f2433

Patch
Kernel Git
https://git.kernel.org/stable/c/9c5164781cb388d219d8f49fa0f0b04cf86ad544

Patch
Kernel Git
https://git.kernel.org/stable/c/fb44d589bf3148e13452185a6e772a7efbf2d684

Patch

Details

CVE ID CVE-2026-46314

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-06-08

Modified 2026-07-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-46314?

CVE-2026-46314 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Infinite Loop flaw (CWE-835) . It affects Linux kernel versions from 5.16 onward and has been patched in 6.1.176, 6.18.33, 7.0.9 and others. CVE-2026-46314 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-46314?

CVE-2026-46314 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-2026-46314?

Yes. CVE-2026-46314 has been patched. Fixed versions include 6.1.176, 6.18.33, 7.0.9 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-2026-46314 actively exploited?

No. CVE-2026-46314 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.