CVE-2024-38621

CVE Details

Release Date:

2024-06-21

Description

In the Linux kernel, the following vulnerability has been resolved:\nmedia: stk1160: fix bounds checking in stk1160_copy_video()\nThe subtract in this condition is reversed. The ->length is the length\nof the buffer. The ->bytesused is how many bytes we have copied thus\nfar. When the condition is reversed that means the result of the\nsubtraction is always negative but since it's unsigned then the result\nis a very high positive value. That means the overflow check is never\ntrue.\nAdditionally, the ->bytesused doesn't actually work for this purpose\nbecause we're not writing to 'buf->mem + buf->bytesused'. Instead, the\nmath to calculate the destination where we are writing is a bit\ninvolved. You calculate the number of full lines already written,\nmultiply by two, skip a line if necessary so that we start on an odd\nnumbered line, and add the offset into the line.\nTo fix this buffer overflow, just take the actual destination where we\nare writing, if the offset is already out of bounds print an error and\nreturn. Otherwise, write up to buf->length bytes.

See more information about CVE-2024-38621 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	4.4	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	High	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12581	2024-08-12
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12611	2024-09-11
Oracle Linux version 7 (kernel-uek-container)	ELSA-2024-12585	2024-08-12
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12581	2024-08-12
Oracle Linux version 8 (kernel-uek-container)	ELSA-2024-12584	2024-08-12