CVE - CVE-2024-38621

CVE-ID
CVE-2024-38621	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/7532bcec0797adfa08791301c3bcae14141db3bd URL:https://git.kernel.org/stable/c/7532bcec0797adfa08791301c3bcae14141db3bd MISC:https://git.kernel.org/stable/c/a08492832cc4cacc24e0612f483c86ca899b9261 URL:https://git.kernel.org/stable/c/a08492832cc4cacc24e0612f483c86ca899b9261 MISC:https://git.kernel.org/stable/c/a16775828aaed1c54ff4e6fe83e8e4d5c6a50cb7 URL:https://git.kernel.org/stable/c/a16775828aaed1c54ff4e6fe83e8e4d5c6a50cb7 MISC:https://git.kernel.org/stable/c/b504518a397059e1d55c521ba0ea2b545a6c4b52 URL:https://git.kernel.org/stable/c/b504518a397059e1d55c521ba0ea2b545a6c4b52 MISC:https://git.kernel.org/stable/c/d410017a7181cb55e4a5c810b32b75e4416c6808 URL:https://git.kernel.org/stable/c/d410017a7181cb55e4a5c810b32b75e4416c6808 MISC:https://git.kernel.org/stable/c/ecf4ddc3aee8ade504c4d36b7b4053ce6093e200 URL:https://git.kernel.org/stable/c/ecf4ddc3aee8ade504c4d36b7b4053ce6093e200 MISC:https://git.kernel.org/stable/c/f6a392266276730bea893b55d12940e32a25f56a URL:https://git.kernel.org/stable/c/f6a392266276730bea893b55d12940e32a25f56a MISC:https://git.kernel.org/stable/c/faa4364bef2ec0060de381ff028d1d836600a381 URL:https://git.kernel.org/stable/c/faa4364bef2ec0060de381ff028d1d836600a381 MLIST:[debian-lts-announce] 20240627 [SECURITY] [DLA 3840-1] linux security update URL:https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
Assigning CNA
kernel.org
Date Record Created
20240618	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240618)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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