Use After Free in Linux Kernel
CVE-2019-7221
The KVM implementation in the Linux kernel through 4.20.5 has a Use-after-Free.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (56.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Linux Kernel
- NetApp Active Iq Performance Analytics Services
- NetApp Element Software Management Node
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
- Debian Linux — versions 8.0
- Fedoraproject Fedora — versions 28, 29
- openSUSE Leap — versions 15.0
- Red Hat Enterprise Linux — versions 7.0
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Server — versions 7.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- packetstormsecurity.com/files/151713/KVM-VMX-Preemption-Timer-Use-After-Free.ht… (VDB Entry, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- github.com/torvalds/linux/commits/master/arch/x86/kvm (Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-02/msg00042.html (vendor-advisory, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2019/02/18/2 (Patch, Mailing List, Third Party Advisory)
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List, Vendor Advisory)
- bugs.chromium.org/p/project-zero/issues/detail (Exploit, Patch, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/03/msg00034.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/04/msg00004.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-7221?
- CVE-2019-7221 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2019-03-21.
- How severe is CVE-2019-7221?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2019-7221 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.