Description
Race condition in the vop_ioctl function in drivers/misc/mic/vop/vop_vringh.c in the MIC VOP driver in the Linux kernel before 4.6.1 allows local users to obtain sensitive information from kernel memory or cause a denial of service (memory corruption and system crash) by changing a certain header, aka a "double fetch" vulnerability.
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 | 4.6.1-1 | — |
| Debian 13 | linux | 4.6.1-1 | — |
| Debian 12 | linux | 4.6.1-1 | — |
| Debian 8 | linux | 3.16.7-ckt25-2+deb8u3 | DSA-3616-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux | 4.4.0-36.55 | USN-3070-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1021.27 | USN-3070-2 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1024.27 | USN-3070-3 |
| Ubuntu 14.04 LTS | linux | 3.13.0-95.142 | USN-3071-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-68.76~14.04.1 | — |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-36.55~14.04.1 | USN-3070-4 |
Advisories 6
- USN-3071-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3070-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3616-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3070-2 linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3070-3 linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3070-4 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
References
- USN-3070-1 vendor-advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.1
- https://bugzilla.kernel.org/show_bug.cgi?id=116651
- USN-3070-3 vendor-advisory
- https://github.com/torvalds/linux/commit/9bf292bfca94694a721449e3fd752493856710f6
- USN-3070-2 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9bf292bfca94694a721449e3fd752493856710f6
- USN-3071-1 vendor-advisory
- DSA-3616 vendor-advisory
- USN-3070-4 vendor-advisory
- 20160630 [CVE-2016-5728] Double-Fetch Vulnerability in Linux-4.5/drivers/misc/mic/host/mic_virtio.c mailing-list
- USN-3071-2 vendor-advisory