发布于3月6日3月6日 Members Oracle Linux: CVE-2024-38621: ELSA-2024-12581: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories) Severity 4 CVSS (AV:L/AC:L/Au:M/C:N/I:N/A:C) Published 06/21/2024 Created 08/20/2024 Added 08/16/2024 Modified 01/23/2025 Description In the Linux kernel, the following vulnerability has been resolved: media: stk1160: fix bounds checking in stk1160_copy_video() The subtract in this condition is reversed.The ->length is the length of the buffer.The ->bytesused is how many bytes we have copied thus far.When the condition is reversed that means the result of the subtraction is always negative but since it's unsigned then the result is a very high positive value.That means the overflow check is never true. Additionally, the ->bytesused doesn't actually work for this purpose because we're not writing to "buf->mem + buf->bytesused".Instead, the math to calculate the destination where we are writing is a bit involved.You calculate the number of full lines already written, multiply by two, skip a line if necessary so that we start on an odd numbered line, and add the offset into the line. To fix this buffer overflow, just take the actual destination where we are writing, if the offset is already out of bounds print an error and return.Otherwise, write up to buf->length bytes. Solution(s) oracle-linux-upgrade-kernel-uek References https://attackerkb.com/topics/cve-2024-38621 CVE - 2024-38621 ELSA-2024-12581 ELSA-2024-12584 ELSA-2024-12585 ELSA-2024-12611
