Vulnerability Details : CVE-2018-15857
An invalid free in ExprAppendMultiKeysymList in xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be used by local attackers to crash xkbcommon keymap parsers or possibly have unspecified other impact by supplying a crafted keymap file.
Products affected by CVE-2018-15857
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:a:xkbcommon:libxkbcommon:*:*:*:*:*:*:*:*
- cpe:2.3:a:xkbcommon:xkbcommon:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-15857
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-15857
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
4.6
|
MEDIUM | AV:L/AC:L/Au:N/C:P/I:P/A:P |
3.9
|
6.4
|
NIST | |
7.8
|
HIGH | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2018-15857
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-15857
-
https://usn.ubuntu.com/3786-1/
USN-3786-1: libxkbcommon vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://security.gentoo.org/glsa/201810-05
xkbcommon: Multiple vulnerabilities (GLSA 201810-05) — Gentoo securityThird Party Advisory
-
https://github.com/xkbcommon/libxkbcommon/commit/c1e5ac16e77a21f87bdf3bc4dea61b037a17dddb
xkbcomp: fix pointer value for FreeStmt · xkbcommon/libxkbcommon@c1e5ac1 · GitHubPatch;Third Party Advisory
-
https://lists.freedesktop.org/archives/wayland-devel/2018-August/039232.html
[ANNOUNCE] libxkbcommon 0.8.1Mailing List;Patch;Third Party Advisory
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https://access.redhat.com/errata/RHSA-2019:2079
RHSA-2019:2079 - Security Advisory - Red Hat Customer Portal
-
https://usn.ubuntu.com/3786-2/
USN-3786-2: libxkbcommon vulnerabilities | Ubuntu security noticesThird Party Advisory
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