What is CVE-2024-35801?

CVE-2024-35801 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 5.16 onward and patched in 6.1.84, 6.6.24, 6.7.12 and others. CVE-2024-35801 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-35801?

CVE-2024-35801 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-2024-35801?

Yes, CVE-2024-35801 has been patched. Fixed versions include 6.1.84, 6.6.24, 6.7.12 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-2024-35801 actively exploited?

CVE-2024-35801 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-2024-35801

Medium

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Keep xfd_state in sync with MSR_IA32_XFD Commit 672365477ae8 ("x86/fpu: Update XFD state where required") and commit 8bf26758ca96 ("x86/fpu: Add XFD state to fpstate") introduced a per CPU variable xfd_state to keep the MSR_IA32_XFD value cached, in order to avoid unnecessary writes to the MSR. On CPU hotplug MSR_IA32_XFD is reset to the init_fpstate.xfd, which wipes out any stale state. But the per CPU cached xfd value is not reset, which brings them out of sync. As a consequence a subsequent xfd_update_state() might fail to update the MSR which in turn can result in XRSTOR raising a #NM in kernel space, which crashes the kernel. To fix this, introduce xfd_set_state() to write xfd_state together with MSR_IA32_XFD, and use it in all places that set MSR_IA32_XFD.

Package Linux Kernel

Published 2024-05-17

Last modified 2025-09-19

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-416

CVE-2024-35801 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 5.16 and later are affected. Fixed in 6.1.84, 6.6.24, 6.7.12, 6.8.3, 6.9 and their respective stable series.

Affected from

≥ 5.16

Fixed in

✓ 6.1.84 6.1.x ✓ 6.6.24 6.6.x ✓ 6.7.12 6.7.x ✓ 6.8.3 6.8.x ✓ 6.9

References

5 total

Kernel Git
https://git.kernel.org/stable/c/10e4b5166df9ff7a2d5316138ca668b42d004422

Patch
Kernel Git
https://git.kernel.org/stable/c/1acbca933313aa866e39996904c9aca4d435c4cd

Patch
Kernel Git
https://git.kernel.org/stable/c/21c7c00dae55cb0e3810d5f9506b58f68475d41d

Patch
Kernel Git
https://git.kernel.org/stable/c/92b0f04e937665bde5768f3fcc622dcce44413d8

Patch
Kernel Git
https://git.kernel.org/stable/c/b61e3b7055ac6edee4be071c52f48c26472d2624

Patch

Details

CVE ID CVE-2024-35801

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-17

Modified 2025-09-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-35801?

CVE-2024-35801 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 5.16 onward and has been patched in 6.1.84, 6.6.24, 6.7.12 and others. CVE-2024-35801 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-35801?

CVE-2024-35801 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-2024-35801?

Yes. CVE-2024-35801 has been patched. Fixed versions include 6.1.84, 6.6.24, 6.7.12 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-2024-35801 actively exploited?

No. CVE-2024-35801 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.