Description
The ioresources_init function in kernel/resource.c in the Linux kernel through 4.7, as used in Android before 2016-08-05 on Nexus 6 and 7 (2013) devices, uses weak permissions for /proc/iomem, which allows local users to obtain sensitive information by reading this file, aka Android internal bug 28814213 and Qualcomm internal bug CR786116. NOTE: the permissions may be intentional in most non-Android contexts.
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-gcp-6.11 +4 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +4 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-87.110 | USN-3364-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1026.35 | USN-3364-3 |
| Ubuntu 16.04 LTS | linux-gke | 4.4.0-1022.22 | USN-3364-3 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1065.73 | USN-3364-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1067.72 | USN-3364-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux | 3.13.0-125.174 | USN-3360-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-87.110~14.04.1 | USN-3364-2 |
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
Advisories 4
- USN-3364-1 linux, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3360-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3364-2 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3364-3 linux-aws, linux-gke vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026