CVE - CVE-2024-46852

CVE-ID
CVE-2024-46852	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: dma-buf: heaps: Fix off-by-one in CMA heap fault handler Until VM_DONTEXPAND was added in commit 1c1914d6e8c6 ("dma-buf: heaps: Don't track CMA dma-buf pages under RssFile") it was possible to obtain a mapping larger than the buffer size via mremap and bypass the overflow check in dma_buf_mmap_internal. When using such a mapping to attempt to fault past the end of the buffer, the CMA heap fault handler also checks the fault offset against the buffer size, but gets the boundary wrong by 1. Fix the boundary check so that we don't read off the end of the pages array and insert an arbitrary page in the mapping.
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/84175dc5b2c932266a50c04e5ce342c30f817a2f URL:https://git.kernel.org/stable/c/84175dc5b2c932266a50c04e5ce342c30f817a2f MISC:https://git.kernel.org/stable/c/e79050882b857c37634baedbdcf7c2047c24cbff URL:https://git.kernel.org/stable/c/e79050882b857c37634baedbdcf7c2047c24cbff MISC:https://git.kernel.org/stable/c/ea5ff5d351b520524019f7ff7f9ce418de2dad87 URL:https://git.kernel.org/stable/c/ea5ff5d351b520524019f7ff7f9ce418de2dad87 MISC:https://git.kernel.org/stable/c/eb7fc8b65cea22f9038c52398c8b22849e9620ea URL:https://git.kernel.org/stable/c/eb7fc8b65cea22f9038c52398c8b22849e9620ea
Assigning CNA
kernel.org
Date Record Created
20240911	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 (20240911)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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