What is CVE-2026-46240?

CVE-2026-46240 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 6.18.16 onward and patched in 6.18.32, 7.0.9 and 7.1. CVE-2026-46240 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46240?

CVE-2026-46240 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-2026-46240?

Yes, CVE-2026-46240 has been patched. Fixed versions include 6.18.32, 7.0.9 and 7.1. If you are running Linux kernel 6.18.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46240 actively exploited?

CVE-2026-46240 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2026-46240

High

In the Linux kernel, the following vulnerability has been resolved: media: iris: Fix use-after-free in iris_release_internal_buffers() The recent change in commit 1dabf00ee206 ("media: iris: gen1: Destroy internal buffers after FW releases") introduced a regression where session_release_buf() may free the buffer. The caller, iris_release_internal_buffers(), continued to access `buffer` after the call, leading to a potential use-after-free. Fix this by setting BUF_ATTR_PENDING_RELEASE before calling session_release_buf(), and reverting the flag if the call fails. This ensures no dereference occurs after potential freeing.

Package Linux Kernel

Published 2026-05-28

Last modified 2026-06-10

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-416

CVE-2026-46240 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.18.16, 6.19.6, 7.0 and later are affected. Fixed in 6.18.32, 7.0.9, 7.1 and their respective stable series.

Affected from

≥ 6.18.16 ≥ 6.19.6 ≥ 7.0

Fixed in

✓ 6.18.32 6.18.x ✓ 7.0.9 7.0.x ✓ 7.1

References

3 total

Kernel Git
https://git.kernel.org/stable/c/18c64439f249859b6140f7bf8bcf95c8ed841f28

Patch
Kernel Git
https://git.kernel.org/stable/c/dd24998a4a4016fb9921916024399bd80f0d45c6

Patch
Kernel Git
https://git.kernel.org/stable/c/f27cfdcfc916bb59297825805f4c3499f89f9e76

Patch

Details

CVE ID CVE-2026-46240

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-05-28

Modified 2026-06-10

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-46240?

CVE-2026-46240 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 6.18.16 onward and has been patched in 6.18.32, 7.0.9 and 7.1. CVE-2026-46240 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-46240?

CVE-2026-46240 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-2026-46240?

Yes. CVE-2026-46240 has been patched. Fixed versions include 6.18.32, 7.0.9 and 7.1. If you are running Linux kernel 6.18.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46240 actively exploited?

No. CVE-2026-46240 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.