What is CVE-2024-36909?

CVE-2024-36909 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 5.16 onward and patched in 6.1.91, 6.6.31, 6.8.10 and others. CVE-2024-36909 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-36909?

CVE-2024-36909 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-2024-36909?

Yes, CVE-2024-36909 has been patched. Fixed versions include 6.1.91, 6.6.31, 6.8.10 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-2024-36909 actively exploited?

CVE-2024-36909 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-2024-36909

Medium

In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Don't free ring buffers that couldn't be re-encrypted In CoCo VMs it is possible for the untrusted host to cause set_memory_encrypted() or set_memory_decrypted() to fail such that an error is returned and the resulting memory is shared. Callers need to take care to handle these errors to avoid returning decrypted (shared) memory to the page allocator, which could lead to functional or security issues. The VMBus ring buffer code could free decrypted/shared pages if set_memory_decrypted() fails. Check the decrypted field in the struct vmbus_gpadl for the ring buffers to decide whether to free the memory.

Package Linux Kernel

Published 2024-05-30

Last modified 2025-09-30

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-2024-36909 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 5.16 and later are affected. Fixed in 6.1.91, 6.6.31, 6.8.10, 6.9 and their respective stable series.

Affected from

≥ 5.16

Fixed in

✓ 6.1.91 6.1.x ✓ 6.6.31 6.6.x ✓ 6.8.10 6.8.x ✓ 6.9

References

4 total

Kernel Git
https://git.kernel.org/stable/c/2f622008bf784a9f5dd17baa19223cc2ac30a039

Patch
Kernel Git
https://git.kernel.org/stable/c/30d18df6567be09c1433e81993e35e3da573ac48

Patch
Kernel Git
https://git.kernel.org/stable/c/82f9e213b124a7d2bb5b16ea35d570260ef467e0

Patch
Kernel Git
https://git.kernel.org/stable/c/a9212a4e2963a7fbe3864ba33dc551d4ad8d0abb

Patch

Details

CVE ID CVE-2024-36909

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-30

Modified 2025-09-30

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-36909?

CVE-2024-36909 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 5.16 onward and has been patched in 6.1.91, 6.6.31, 6.8.10 and others. CVE-2024-36909 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-36909?

CVE-2024-36909 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-2024-36909?

Yes. CVE-2024-36909 has been patched. Fixed versions include 6.1.91, 6.6.31, 6.8.10 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-2024-36909 actively exploited?

No. CVE-2024-36909 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.