--- title: "CVE-2017-5123\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2017-5123?format=md keywords: index, follow --- # CVE-2017-5123 Publication date 12 October 2017 Last updated 4 July 2026 --- Ubuntu priority **High** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **8.8 · High** [Score breakdown](https://ubuntu.com/security/CVE-2017-5123?format=md#impact-score) Toggle side navigation ## Description Insufficient data validation in waitid allowed an user to escape sandboxes on Linux. ### From the Ubuntu Security Team Chris Salls discovered a missing access check in the waitid() system call implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | linux | 17.10 artful | Fixed 4.13.0-16.19 | | 17.04 zesty | Not affected | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not affected | | linux-armadaxp | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-aws | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not affected | | linux-azure | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not affected | | linux-euclid | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-flo | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-gcp | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not in release | | linux-gke | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not in release | | linux-goldfish | 17.10 artful | Not in release | | 17.04 zesty | Not affected | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-grouper | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-hwe | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not in release | | linux-hwe-edge | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not in release | | linux-kvm | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not in release | | linux-linaro-omap | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-linaro-shared | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-linaro-vexpress | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-quantal | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-raring | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-saucy | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-trusty | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-utopic | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-vivid | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-wily | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-xenial | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not affected | | linux-maguro | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-mako | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-manta | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-oem | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not in release | | linux-qcm-msm | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-raspi2 | 17.10 artful | Fixed 4.13.0-1005.5 | | 17.04 zesty | Not affected | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not in release | | linux-snapdragon | 17.10 artful | Not affected | | 17.04 zesty | Not affected | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not in release | | linux-ti-omap4 | 17.10 artful | Not in release | | 17.04 zesty | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) * [Patch details](https://ubuntu.com/security/CVE-2017-5123?format=md#patch-details) ### Patch details For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) | Package | Patch details | | --- | --- | | linux | * Introduced by [4c48abe](https://git.kernel.org/linus/4c48abe91be03d191d0c20cc755877da2cb35622), fixed by [96ca579](https://git.kernel.org/linus/96ca579a1ecc943b75beba58bebb0356f6cc4b51) | ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 8.8 · High * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Local | | Attack complexity | Low | | Privileges required | Low | | User interaction | None | | Scope | Changed | | Confidentiality impact | High | | Integrity impact | High | | Availability impact | High | * Scores | Parameter | Value | | --- | --- | | Base score | 8.8 · High | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5123) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-5123) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-5123) * [Debian](https://security-tracker.debian.org/tracker/CVE-2017-5123) ### Other references *