Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian | Debian Linux | 11.0 |
| Linux | Linux Kernel | >= 5.11, < 5.15.168 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/79cce5e81d20fa9ad553be439d665ac3302d3c95Patch
- https://git.kernel.org/stable/c/84175dc5b2c932266a50c04e5ce342c30f817a2fPatch
- https://git.kernel.org/stable/c/e79050882b857c37634baedbdcf7c2047c24cbffPatch
- https://git.kernel.org/stable/c/ea5ff5d351b520524019f7ff7f9ce418de2dad87Patch
- https://git.kernel.org/stable/c/eb7fc8b65cea22f9038c52398c8b22849e9620eaPatch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2024-46852?
CVE-2024-46852 is a vulnerability with a CVSS score of 7.8 (HIGH). 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: Do...
How severe is CVE-2024-46852?
CVE-2024-46852 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-46852?
Check the references section above for vendor advisories and patch information. Affected products include: Debian Debian Linux, Linux Linux Kernel.