Use After Free in F5 Big-Ip Access Policy Manager
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.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.165 (96.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.165 · newest: 0.165 · change: 0.000
Affected products
- 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
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.chromium.org/p/project-zero/issues/detail (Exploit, Patch, Mailing List, Third Party Advisory)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.99 (Mailing List, Vendor Advisory)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.21 (Mailing List, Vendor Advisory)
- www.exploit-db.com/exploits/46388/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.8 (Mailing List, Vendor Advisory)
- github.com/torvalds/linux/commit/cfa39381173d5f969daf43582c95ad679189cbc9 (Exploit, Patch, Third Party Advisory)
- www.securityfocus.com/bid/107127 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.156 (Mailing List, Vendor Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2019/03/msg00034.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-6974?
- CVE-2019-6974 is a high-severity vulnerability in F5 Big-Ip Access Policy Manager, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 8.1/10. Published 2019-02-15.
- How severe is CVE-2019-6974?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2019-6974 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.