CVE-2019-6974
In the Linux kernel before 4.20.8, kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandles reference counting because of a race condition, leading to a use-after-free.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 16.5%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
In the Linux kernel before 4.20.8, kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandles reference counting because of a race condition, leading to a use-after-free.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 16.52% probability · 97th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 15 February 2019
- CISA KEV
- Not listed
- Weakness
- CWE-362, CWE-416
- Affected
- linux/linux kernel · debian/debian linux · canonical/ubuntu linux · f5/big-ip access policy manager · f5/big-ip advanced firewall manager · f5/big-ip analytics · f5/big-ip application acceleration manager · f5/big-ip application security manager · f5/big-ip edge gateway · f5/big-ip fraud protection service · f5/big-ip global traffic manager · f5/big-ip link controller · f5/big-ip local traffic manager · f5/big-ip policy enforcement manager · f5/big-ip webaccelerator · redhat/openshift container platform · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux eus · redhat/enterprise linux server · +4 more
- Source
- cve@mitre.org
EPSS 16.5% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cfa39381173d5f969daf43582c95ad679189cbc9Mailing List, Patch, Vendor Advisory
- http://www.securityfocus.com/bid/107127Broken Link, Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHBA-2019:0959Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0818Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0833Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2809Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3967Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0103Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1765Exploit, Mailing List, Patch, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.99Mailing List, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.21Mailing List, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.8Mailing List, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.156Mailing List, Vendor Advisory
- https://github.com/torvalds/linux/commit/cfa39381173d5f969daf43582c95ad679189cbc9Exploit, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/05/msg00002.htmlMailing List, Third Party Advisory
- https://support.f5.com/csp/article/K11186236Third Party Advisory
- https://support.f5.com/csp/article/K11186236?utm_source=f5support&%3Butm_medium=RSS
- https://usn.ubuntu.com/3930-1/Third Party Advisory
- https://usn.ubuntu.com/3930-2/Third Party Advisory
- https://usn.ubuntu.com/3931-1/Third Party Advisory
- https://usn.ubuntu.com/3931-2/Third Party Advisory
- https://usn.ubuntu.com/3932-1/Third Party Advisory
- https://usn.ubuntu.com/3932-2/Third Party Advisory
- https://usn.ubuntu.com/3933-1/Third Party Advisory
- https://usn.ubuntu.com/3933-2/Third Party Advisory
- https://www.exploit-db.com/exploits/46388/Exploit, Third Party Advisory, VDB Entry
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cfa39381173d5f969daf43582c95ad679189cbc9Mailing List, Patch, Vendor Advisory
- http://www.securityfocus.com/bid/107127Broken Link, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.