What is CVE-2022-48636?

CVE-2022-48636 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 2.6.25 onward and patched in 4.9.330, 4.14.295, 4.19.260 and others. CVE-2022-48636 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-48636?

CVE-2022-48636 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-2022-48636?

Yes, CVE-2022-48636 has been patched. Fixed versions include 4.9.330, 4.14.295, 4.19.260 and others. If you are running Linux kernel 2.6.25 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-48636 actively exploited?

CVE-2022-48636 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2022-48636

Medium

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held. Fix by checking the pavgroup pointer with lcu->lock held.

Package Linux Kernel

Published 2024-04-28

Last modified 2025-03-21

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-476

CVE-2022-48636 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 2.6.25 and later are affected. Fixed in 4.9.330, 4.14.295, 4.19.260, 5.4.215, 5.10.146, 5.15.71, 5.19.12, 6.0 and their respective stable series.

Affected from

≥ 2.6.25

Fixed in

✓ 4.9.330 4.9.x ✓ 4.14.295 4.14.x ✓ 4.19.260 4.19.x ✓ 5.4.215 5.4.x ✓ 5.10.146 5.10.x ✓ 5.15.71 5.15.x ✓ 5.19.12 5.19.x ✓ 6.0

References

8 total

Kernel Git
https://git.kernel.org/stable/c/2e473351400e3dd66f0b71eddcef82ee45a584c1

Patch
Kernel Git
https://git.kernel.org/stable/c/49f401a98b318761ca2e15d4c7869a20043fbed4

Patch
Kernel Git
https://git.kernel.org/stable/c/650a2e79d176db753654d3dde88e53a2033036ac

Patch
Kernel Git
https://git.kernel.org/stable/c/aaba5ff2742043705bc4c02fd0b2b246e2e16da1

Patch
Kernel Git
https://git.kernel.org/stable/c/d3a67c21b18f33c79382084af556557c442f12a6

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2022-48636

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-04-28

Modified 2025-03-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2022-48636?

CVE-2022-48636 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 2.6.25 onward and has been patched in 4.9.330, 4.14.295, 4.19.260 and others. CVE-2022-48636 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-48636?

CVE-2022-48636 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-2022-48636?

Yes. CVE-2022-48636 has been patched. Fixed versions include 4.9.330, 4.14.295, 4.19.260 and others. If you are running Linux kernel 2.6.25 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-48636 actively exploited?

No. CVE-2022-48636 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.