CVE-2020-27835
Advisory lineage Upstream: 0 Downstream: 23
Modified
Published: 07 Jan 2021, 17:24
Last modified:04 Aug 2024, 16:25
Vulnerability Summary
Overall Risk (default)
low
20/100 CVSS Score
4.9 MEDIUM
v2.0 (nvd)
EPSS Score
0.02% LOW
0% probability -0.05%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected
Timeline
07 Jan 2021, 17:24
Published
Vulnerability first disclosed
04 Aug 2024, 16:25
Last Modified
Vulnerability information updated
Description
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.
CVSS Metrics
- v3.1•MEDIUM•Score: 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- v2.0•MEDIUM•Score: 4.9AV:L/AC:L/Au:N/C:N/I:N/A:C
EPSS Trends
Current EPSS score: 0.02%• Percentile: 7%
Techniques & Countermeasures
- CWE-416•Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
Affected Systems
- linux•infiniband_hfi1_driver
≤ 5.9 | 5.10:rc1 | 5.10:rc2 | 5.10:rc3 | 5.10:rc4 | 5.10:rc5