--- title: "CVE-2018-19854\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-2018-19854?format=md keywords: index, follow --- # CVE-2018-19854 Publication date 4 December 2018 Last updated 4 July 2026 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **4.7 · Medium** [Score breakdown](https://ubuntu.com/security/CVE-2018-19854?format=md#impact-score) Toggle side navigation ## Description An issue was discovered in the Linux kernel before 4.19.3. crypto\_report\_one() and related functions in crypto/crypto\_user.c (the crypto user configuration API) do not fully initialize structures that are copied to userspace, potentially leaking sensitive memory to user programs. NOTE: this is a CVE-2013-2547 regression but with easier exploitability because the attacker does not need a capability (however, the system must have the CONFIG\_CRYPTO\_USER kconfig option). ### From the Ubuntu Security Team It was discovered that the crypto subsystem of the Linux kernel leaked uninitialized memory to user space in some situations. A local attacker could use this to expose sensitive information (kernel memory). ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | linux | 18.10 cosmic | Fixed 4.18.0-14.15 | | 18.04 LTS bionic | Fixed 4.15.0-46.49 | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not affected | | linux-aws | 18.10 cosmic | Fixed 4.18.0-1008.10 | | 18.04 LTS bionic | Fixed 4.15.0-1033.35 | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not affected | | linux-aws-hwe | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Fixed 4.15.0-1033.35~16.04.1 | | 14.04 LTS trusty | Not in release | | linux-azure | 18.10 cosmic | Fixed 4.18.0-1008.8 | | 18.04 LTS bionic | Fixed 4.18.0-1011.11~18.04.1 | | 16.04 LTS xenial | Fixed 4.15.0-1040.44 | | 14.04 LTS trusty | Fixed 4.15.0-1040.44~14.04.1 | | linux-azure-edge | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Fixed 4.18.0-1011.11~18.04.1 | | 16.04 LTS xenial | Fixed 4.15.0-1040.44 | | 14.04 LTS trusty | Not in release | | linux-euclid | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-flo | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-gcp | 18.10 cosmic | Fixed 4.18.0-1006.7 | | 18.04 LTS bionic | Fixed 4.15.0-1028.29 | | 16.04 LTS xenial | Fixed 4.15.0-1028.29~16.04.1 | | 14.04 LTS trusty | Not in release | | linux-gcp-edge | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Fixed 4.18.0-1006.7~18.04.1 | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-gke | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Ignored end of standard support | | 14.04 LTS trusty | Not in release | | linux-goldfish | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-grouper | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-hwe | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Fixed 4.18.0-14.15~18.04.1 | | 16.04 LTS xenial | Fixed 4.15.0-46.49~16.04.1 | | 14.04 LTS trusty | Not in release | | linux-hwe-edge | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not affected | | 16.04 LTS xenial | Fixed 4.15.0-46.49~16.04.1 | | 14.04 LTS trusty | Not in release | | linux-kvm | 18.10 cosmic | Fixed 4.18.0-1007.7 | | 18.04 LTS bionic | Fixed 4.15.0-1030.30 | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not in release | | linux-lts-trusty | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-utopic | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-vivid | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-wily | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-lts-xenial | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not affected | | linux-maguro | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-mako | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-manta | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | linux-oem | 18.10 cosmic | Fixed 4.15.0-1034.39 | | 18.04 LTS bionic | Fixed 4.15.0-1034.39 | | 16.04 LTS xenial | Ignored end of standard support, was needs-triage | | 14.04 LTS trusty | Not in release | | linux-oracle | 18.10 cosmic | Not affected | | 18.04 LTS bionic | Fixed 4.15.0-1009.11 | | 16.04 LTS xenial | Fixed 4.15.0-1009.11~16.04.1 | | 14.04 LTS trusty | Not in release | | linux-raspi2 | 18.10 cosmic | Fixed 4.18.0-1009.11 | | 18.04 LTS bionic | Fixed 4.15.0-1032.34 | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not in release | | linux-snapdragon | 18.10 cosmic | Not in release | | 18.04 LTS bionic | Not affected | | 16.04 LTS xenial | Not affected | | 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-2018-19854?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 [4473710](https://git.kernel.org/linus/4473710df1f8779c59b33737eeaa151596907761), fixed by [f43f399](https://git.kernel.org/linus/f43f39958beb206b53292801e216d9b8a660f087) | ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 4.7 · Medium * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Local | | Attack complexity | High | | Privileges required | Low | | User interaction | None | | Scope | Unchanged | | Confidentiality impact | High | | Integrity impact | None | | Availability impact | None | * Scores | Parameter | Value | | --- | --- | | Base score | 4.7 · Medium | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-19854) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-19854) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-19854) * [Debian](https://security-tracker.debian.org/tracker/CVE-2018-19854) ### Related Ubuntu Security Notices (USN) + [USN-3878-1](https://usn.ubuntu.com/USN-3878-1) + Linux kernel vulnerabilities + 4 February 2019 + [USN-3901-1](https://usn.ubuntu.com/USN-3901-1) + Linux kernel vulnerabilities + 5 March 2019 + [USN-3901-2](https://usn.ubuntu.com/USN-3901-2) + Linux kernel (HWE) vulnerabilities + 5 March 2019 + [USN-3872-1](https://usn.ubuntu.com/USN-3872-1) + Linux kernel (HWE) vulnerabilities + 29 January 2019 + [USN-3878-2](https://usn.ubuntu.com/USN-3878-2) + Linux kernel (Azure) vulnerabilities + 7 February 2019 ### Other references * *