What is CVE-2022-48950?

CVE-2022-48950 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 5.15.77 onward and patched in 5.15.84 and 6.0.14. CVE-2022-48950 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-48950?

CVE-2022-48950 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-2022-48950?

Yes, CVE-2022-48950 has been patched. Fixed versions include 5.15.84 and 6.0.14. If you are running Linux kernel 5.15.77 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-48950 actively exploited?

CVE-2022-48950 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-2022-48950

High

In the Linux kernel, the following vulnerability has been resolved: perf: Fix perf_pending_task() UaF Per syzbot it is possible for perf_pending_task() to run after the event is free()'d. There are two related but distinct cases: - the task_work was already queued before destroying the event; - destroying the event itself queues the task_work. The first cannot be solved using task_work_cancel() since perf_release() itself might be called from a task_work (____fput), which means the current->task_works list is already empty and task_work_cancel() won't be able to find the perf_pending_task() entry. The simplest alternative is extending the perf_event lifetime to cover the task_work. The second is just silly, queueing a task_work while you know the event is going away makes no sense and is easily avoided by re-arranging how the event is marked STATE_DEAD and ensuring it goes through STATE_OFF on the way down.

Package Linux Kernel

Published 2024-10-21

Last modified 2024-10-25

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-2022-48950 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 5.15.77, 6.0.7 and later are affected. Fixed in 5.15.84, 6.0.14 and their respective stable series.

Affected from

≥ 5.15.77 ≥ 6.0.7

Fixed in

✓ 5.15.84 5.15.x ✓ 6.0.14 6.0.x

References

3 total

Kernel Git
https://git.kernel.org/stable/c/517e6a301f34613bff24a8e35b5455884f2d83d8

Patch
Kernel Git
https://git.kernel.org/stable/c/78e1317a174edbfd1182599bf76c092a2877672c

Patch
Kernel Git
https://git.kernel.org/stable/c/8bffa95ac19ff27c8261904f89d36c7fcf215d59

Patch

Details

CVE ID CVE-2022-48950

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-10-21

Modified 2024-10-25

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2022-48950?

CVE-2022-48950 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 5.15.77 onward and has been patched in 5.15.84 and 6.0.14. CVE-2022-48950 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-48950?

CVE-2022-48950 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-2022-48950?

Yes. CVE-2022-48950 has been patched. Fixed versions include 5.15.84 and 6.0.14. If you are running Linux kernel 5.15.77 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-48950 actively exploited?

No. CVE-2022-48950 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.