Description
arch/arm/mm/dma-mapping.c in the Linux kernel before 3.13 on ARM platforms, as used in Android before 2016-08-05 on Nexus 5 and 7 (2013) devices, does not prevent executable DMA mappings, which might allow local users to gain privileges via a crafted application, aka Android internal bug 28803642 and Qualcomm internal bug CR642735.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 3.13.4-1 | — |
| Debian 13 | linux | 3.13.4-1 | — |
| Debian 12 | linux | 3.13.4-1 | — |
| Debian 7 | linux | 3.2.84-2 | DLA-833-1 |
Advisories 1
- DLA-833-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://source.android.com/security/bulletin/2016-08-01.html
- https://github.com/torvalds/linux/commit/0ea1ec713f04bdfac343c9702b21cd3a7c711826
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ea1ec713f04bdfac343c9702b21cd3a7c711826
- 92219 vdb-entry
- https://source.codeaurora.org/quic/la/kernel/msm/commit/?id=f044936caab337a4384fbfe64a4cbae33c7e22a1