What is CVE-2026-46182?

CVE-2026-46182 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 6.18 onward and patched in 6.18.30, 7.0.7 and 7.1. CVE-2026-46182 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46182?

CVE-2026-46182 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-2026-46182?

Yes, CVE-2026-46182 has been patched. Fixed versions include 6.18.30, 7.0.7 and 7.1. If you are running Linux kernel 6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46182 actively exploited?

CVE-2026-46182 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2026-46182

Medium

In the Linux kernel, the following vulnerability has been resolved: pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace The hdr variable is allocated on the stack and only hdr.version and hdr.flags are initialized explicitly. Because the struct papr_hvpipe_hdr contains reserved padding bytes (reserved[3] and reserved2[40]), these could leak the uninitialized bytes to userspace after copy_to_user(). This patch fixes that by initializing the whole struct to 0.

Package Linux Kernel

Published 2026-05-28

Last modified 2026-06-11

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-401

CVE-2026-46182 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.18 and later are affected. Fixed in 6.18.30, 7.0.7, 7.1 and their respective stable series.

Affected from

≥ 6.18

Fixed in

✓ 6.18.30 6.18.x ✓ 7.0.7 7.0.x ✓ 7.1

References

3 total

Kernel Git
https://git.kernel.org/stable/c/0479b6e9f999cc1cbad7d9f09f574fc387e605d5

Patch
Kernel Git
https://git.kernel.org/stable/c/cefeed44296261173a806bef988b26bc565da4be

Patch
Kernel Git
https://git.kernel.org/stable/c/f88f8e4485b437e0a2f96a7ff1f88aa22d925659

Patch

Details

CVE ID CVE-2026-46182

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-05-28

Modified 2026-06-11

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-46182?

CVE-2026-46182 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 6.18 onward and has been patched in 6.18.30, 7.0.7 and 7.1. CVE-2026-46182 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-46182?

CVE-2026-46182 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-2026-46182?

Yes. CVE-2026-46182 has been patched. Fixed versions include 6.18.30, 7.0.7 and 7.1. If you are running Linux kernel 6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46182 actively exploited?

No. CVE-2026-46182 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.