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
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:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-27835
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-27835
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
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
-
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: secalert@redhat.com (Primary)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
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