AZL-49837
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-49837.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-49837
- Upstream
- Published
- 2024-09-27T13:15:16Z
- Modified
- 2026-04-01T05:17:28.791679Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- CVE-2024-46852 affecting package kernel for versions less than 6.6.56.1-5
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
dma-buf: heaps: Fix off-by-one in CMA heap fault handler
Until VMDONTEXPAND 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 dmabufmmapinternal. 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