Description
Race condition in the ec_device_ioctl_xcmd function in drivers/platform/chrome/cros_ec_dev.c in the Linux kernel before 4.7 allows local users to cause a denial of service (out-of-bounds array access) by changing a certain size value, 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 | 4.7.2-1 | — |
| Debian 13 | linux | 4.7.2-1 | — |
| Debian 12 | linux | 4.7.2-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux | 4.4.0-38.57 | USN-3084-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1023.29 | USN-3084-3 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1026.29 | USN-3084-4 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-38.57~14.04.1 | USN-3084-2 |
Advisories 4
- USN-3084-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3084-2 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3084-3 linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3084-4 linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=096cdc6f52225835ff503f987a0d68ef770bb78e
- https://bugzilla.kernel.org/show_bug.cgi?id=120131
- https://github.com/torvalds/linux/commit/096cdc6f52225835ff503f987a0d68ef770bb78e
- 91553 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1353490
- 20160704 [CVE-2016-6156] Double-Fetch Vulnerability in Linux-4.6/drivers/platform/chrome/cros_ec_dev.c mailing-list