What is CVE-2024-49936?

CVE-2024-49936 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 4.7 onward and patched in 5.4.290, 5.10.227, 5.15.168 and others. CVE-2024-49936 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-49936?

CVE-2024-49936 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-2024-49936?

Yes, CVE-2024-49936 has been patched. Fixed versions include 5.4.290, 5.10.227, 5.15.168 and others. If you are running Linux kernel 4.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-49936 actively exploited?

CVE-2024-49936 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-2024-49936

High

In the Linux kernel, the following vulnerability has been resolved: net/xen-netback: prevent UAF in xenvif_flush_hash() During the list_for_each_entry_rcu iteration call of xenvif_flush_hash, kfree_rcu does not exist inside the rcu read critical section, so if kfree_rcu is called when the rcu grace period ends during the iteration, UAF occurs when accessing head->next after the entry becomes free. Therefore, to solve this, you need to change it to list_for_each_entry_safe.

Package Linux Kernel

Published 2024-10-21

Last modified 2025-11-03

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-2024-49936 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 4.7 and later are affected. Fixed in 5.4.290, 5.10.227, 5.15.168, 6.1.113, 6.6.55, 6.10.14, 6.11.3, 6.12 and their respective stable series.

Affected from

≥ 4.7

Fixed in

✓ 5.4.290 5.4.x ✓ 5.10.227 5.10.x ✓ 5.15.168 5.15.x ✓ 6.1.113 6.1.x ✓ 6.6.55 6.6.x ✓ 6.10.14 6.10.x ✓ 6.11.3 6.11.x ✓ 6.12

References

10 total

Kernel Git
https://git.kernel.org/stable/c/0fa5e94a1811d68fbffa0725efe6d4ca62c03d12

Patch
Kernel Git
https://git.kernel.org/stable/c/143edf098b80669d05245b2f2367dd156a83a2c5

Patch
Kernel Git
https://git.kernel.org/stable/c/54d8639af5568fc41c0e274fc3ec9cf86c59fcbb

Patch
Kernel Git
https://git.kernel.org/stable/c/a0465723b8581cad27164c9073fd780904cd22d4

Patch
Kernel Git
https://git.kernel.org/stable/c/a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c

Patch

Showing 5 of 10 references View all on NVD

Details

CVE ID CVE-2024-49936

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-10-21

Modified 2025-11-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-49936?

CVE-2024-49936 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 4.7 onward and has been patched in 5.4.290, 5.10.227, 5.15.168 and others. CVE-2024-49936 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-49936?

CVE-2024-49936 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-2024-49936?

Yes. CVE-2024-49936 has been patched. Fixed versions include 5.4.290, 5.10.227, 5.15.168 and others. If you are running Linux kernel 4.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-49936 actively exploited?

No. CVE-2024-49936 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.