CVE-2022-39842

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha detectado un problema en el kernel de Linux versiones anteriores a 5.19. En la función pxa3xx_gcu_write en el archivo drivers/video/fbdev/pxa3xx-gcu.c, el parámetro count presenta un conflicto de tipo size_t frente a int, causando un desbordamiento de enteros y omite la comprobación de tamaño. Además, al ser usado como tercer argumento de copy_from_user(), puede producirse un desbordamiento de pila

*Credits: N/A

CVSS Scores

NISTv3.1 6.1

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-09-05 CVE Reserved
2022-09-05 CVE Published
2023-12-11 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-190: Integer Overflow or Wraparound

CAPEC

References (6)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html	Mailing List
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html	Mailing List
https://lore.kernel.org/all/YylaC1wHHyLw22D3%40kadam/T

URL	Date	SRC

URL	Date	SRC
https://github.com/torvalds/linux/commit/a09d2d00af53b43c6f11e6ab3cb58443c2cac8a7	2024-05-17

URL	Date	SRC
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19	2024-05-17
https://www.debian.org/security/2022/dsa-5257	2024-05-17

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.19 Search vendor "Linux" for product "Linux Kernel" and version " < 5.19"		-		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.19 Search vendor "Linux" for product "Linux Kernel" and version "5.19"		rc1		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.19 Search vendor "Linux" for product "Linux Kernel" and version "5.19"		rc2		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				5.19 Search vendor "Linux" for product "Linux Kernel" and version "5.19"		rc3		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected