Use After Free in Linux Kernel
CVE-2019-18197
In xsltCopyText in transform.c in libxslt 1.1.33, a pointer variable isn't reset under certain circumstances. If the relevant memory area happened to be freed and reused in a certain way, a bounds check could fail and memory outside a buffer could be written to, or uninitialized data could be disclosed.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.044 (91.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.044 · newest: 0.044 · change: 0.000
Affected products
- Linux Kernel
- Xmlsoft Libxslt — versions 1.1.33
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- Debian Linux — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gitlab.gnome.org/GNOME/libxslt/commit/2232473733b7313d67de8836ea3b29eec6e8e285 (Patch, Third Party Advisory)
- bugs.chromium.org/p/oss-fuzz/issues/detail (Third Party Advisory, Issue Tracking)
- bugs.chromium.org/p/oss-fuzz/issues/detail (Third Party Advisory, Issue Tracking)
- bugs.chromium.org/p/oss-fuzz/issues/detail (Third Party Advisory, Issue Tracking)
- usn.ubuntu.com/4164-1/ (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/10/msg00037.html (mailing-list, Third Party Advisory)
- security.netapp.com/advisory/ntap-20191031-0004/ (Third Party Advisory)
- www.openwall.com/lists/oss-security/2019/11/17/2 (mailing-list, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-02/msg00010.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-02/msg00015.html (vendor-advisory)
Frequently asked questions
- What is CVE-2019-18197?
- CVE-2019-18197 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.5/10. Published 2019-10-18.
- How severe is CVE-2019-18197?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-18197 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.