Vulnerability Details : 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 category: Memory Corruption
Exploit prediction scoring system (EPSS) score for CVE-2020-27835
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2020-27835
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST |
|
4.4
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
0.8
|
3.6
|
NIST |
CWE ids for CVE-2020-27835
-
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.Assigned by: secalert@redhat.com (Primary)
References for CVE-2020-27835
-
https://bugzilla.redhat.com/show_bug.cgi?id=1901709
1901709 – (CVE-2020-27835) CVE-2020-27835 kernel: child process is able to access parent mm through hfi dev file handleIssue Tracking;Patch;Third Party Advisory
Products affected by CVE-2020-27835
- cpe:2.3:a:linux:infiniband_hfi1_driver:*:*:*:*:*:*:*:*
- cpe:2.3:a:linux:infiniband_hfi1_driver:5.10:rc1:*:*:*:*:*:*
- cpe:2.3:a:linux:infiniband_hfi1_driver:5.10:rc2:*:*:*:*:*:*
- cpe:2.3:a:linux:infiniband_hfi1_driver:5.10:rc3:*:*:*:*:*:*
- cpe:2.3:a:linux:infiniband_hfi1_driver:5.10:rc4:*:*:*:*:*:*
- cpe:2.3:a:linux:infiniband_hfi1_driver:5.10:rc5:*:*:*:*:*:*