Use After Free in Linux Infiniband Hfi1 Driver
CVE-2020-27835
A use after free in the Linux kernel infiniband hfi1 driver in versions prior to 5.10-rc6 was found in the way user calls Ioctl after open dev file and fork. A local user could use this flaw to crash the system.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (21.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Linux Infiniband Hfi1 Driver — versions 5.10
- Kernel — versions kernel versions prior to 5.10-rc6
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2020-27835?
- CVE-2020-27835 is a medium-severity vulnerability in Linux Infiniband Hfi1 Driver, classified under Use After Free. CVSS score: 4.4/10. Published 2021-01-07.
- How severe is CVE-2020-27835?
- Medium severity. CVSS v3 base score is 4.4 out of 10.
- Is CVE-2020-27835 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.