Use After Free in Linux Kernel
CVE-2020-10690
There is a use-after-free in kernel versions before 5.5 due to a race condition between the release of ptp_clock and cdev while resource deallocation. When a (high privileged) process allocates a ptp device file (like /dev/ptpX) and voluntarily goes to sleep. During this time if the underlying device is removed, it can cause an exploitable condition as the process wakes up to terminate and clean all attached files. The system crashes due to the cdev structure being invalid (as already freed) which is pointed to by the inode.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (29.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- security.netapp.com/advisory/ntap-20200608-0001/ (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/06/msg00011.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/06/msg00013.html (mailing-list, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html (vendor-advisory, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4419-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-10690?
- CVE-2020-10690 is a medium-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 6.5/10. Published 2020-05-08.
- How severe is CVE-2020-10690?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2020-10690 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.