What is CVE-2023-52473?

CVE-2023-52473 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 6.4 onward and patched in 6.6.14, 6.7.2 and 6.8. CVE-2023-52473 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-52473?

CVE-2023-52473 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-2023-52473?

Yes, CVE-2023-52473 has been patched. Fixed versions include 6.6.14, 6.7.2 and 6.8. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-52473 actively exploited?

CVE-2023-52473 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-2023-52473

Medium

In the Linux kernel, the following vulnerability has been resolved: thermal: core: Fix NULL pointer dereference in zone registration error path If device_register() in thermal_zone_device_register_with_trips() returns an error, the tz variable is set to NULL and subsequently dereferenced in kfree(tz->tzp). Commit adc8749b150c ("thermal/drivers/core: Use put_device() if device_register() fails") added the tz = NULL assignment in question to avoid a possible double-free after dropping the reference to the zone device. However, after commit 4649620d9404 ("thermal: core: Make thermal_zone_device_unregister() return after freeing the zone"), that assignment has become redundant, because dropping the reference to the zone device does not cause the zone object to be freed any more. Drop it to address the NULL pointer dereference.

Package Linux Kernel

Published 2024-02-26

Last modified 2024-11-21

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-2023-52473 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 6.4 and later are affected. Fixed in 6.6.14, 6.7.2, 6.8 and their respective stable series.

Affected from

≥ 6.4

Fixed in

✓ 6.6.14 6.6.x ✓ 6.7.2 6.7.x ✓ 6.8

References

3 total

Kernel Git
https://git.kernel.org/stable/c/02871710b93058eb1249d5847c0b2d1c2c3c98ae

Patch
Kernel Git
https://git.kernel.org/stable/c/04e6ccfc93c5a1aa1d75a537cf27e418895e20ea

Patch
Kernel Git
https://git.kernel.org/stable/c/335176dd8ebaca6493807dceea33c478305667fa

Patch

Details

CVE ID CVE-2023-52473

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-02-26

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-52473?

CVE-2023-52473 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 6.4 onward and has been patched in 6.6.14, 6.7.2 and 6.8. CVE-2023-52473 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-52473?

CVE-2023-52473 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-2023-52473?

Yes. CVE-2023-52473 has been patched. Fixed versions include 6.6.14, 6.7.2 and 6.8. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-52473 actively exploited?

No. CVE-2023-52473 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.