What is CVE-2022-39842?

CVE-2022-39842 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.1 out of 10, classified as a Integer Overflow flaw (CWE-190). CVE-2022-39842 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-39842?

CVE-2022-39842 has a CVSS score of 6.1 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:L/A:H.

Is there a patch available for CVE-2022-39842?

No patch is currently available for CVE-2022-39842. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2022-39842 actively exploited?

CVE-2022-39842 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Integer Overflow (CWE-190)?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/190.html

CVE-2022-39842

Medium

An issue was discovered in the Linux kernel before 5.19. In pxa3xx_gcu_write in drivers/video/fbdev/pxa3xx-gcu.c, the count parameter has a type conflict of size_t versus int, causing an integer overflow and bypassing the size check. After that, because it is used as the third argument to copy_from_user(), a heap overflow may occur. NOTE: the original discoverer disputes that the overflow can actually happen.

Package Linux Kernel

Published 2022-09-05

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

6.1

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Weakness type

CWE-190

CVE-2022-39842 is a Integer Overflow vulnerability

What is Integer Overflow?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2022-39842 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel.org
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19

Release Notes Vendor Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html

Mailing List Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html

Mailing List Third Party Advisory
Kernel.org
https://lore.kernel.org/all/YylaC1wHHyLw22D3%40kadam/T/
Debian Security
https://www.debian.org/security/2022/dsa-5257

Third Party Advisory
Kernel patch commit
https://github.com/torvalds/linux/commit/a09d2d00af53b43c6f11e6ab3cb58443c2cac8a7
Patch

Details

CVE ID CVE-2022-39842

Severity Medium

CVSS score 6.1 / 10

CVSS version 3.1

Published 2022-09-05

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2022-39842?

CVE-2022-39842 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.1 out of 10 , classified as an Integer Overflow flaw (CWE-190) . CVE-2022-39842 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-39842?

CVE-2022-39842 has a CVSS score of 6.1 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:L/A:H.
Is there a patch available for CVE-2022-39842?

No patch is currently available for CVE-2022-39842. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2022-39842 actively exploited?

No — CVE-2022-39842 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Integer Overflow (CWE-190)?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. View CWE-190 on MITRE CWE →