CVE-2020-12826 Detail
Current Description
A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.
Source: MITRE
View Analysis Description
Analysis Description
A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.
Source: MITRE
Severity
References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-190 | Integer Overflow or Wraparound | NIST |
Known Affected Software Configurations Switch to CPE 2.2
Change History
2 change records found – show changes
Initial Analysis – 5/14/2020 12:25:30 PM
| Action | Type | Old Value | New Value |
|---|---|---|---|
| Added | CPE Configuration |
OR
*cpe:2.3:a:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
|
|
| Added | CPE Configuration |
OR
*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.6.5
|
|
| Added | CVSS V2 |
NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C) |
|
| Added | CVSS V3.1 |
NIST AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
|
| Added | CWE |
NIST CWE-190 |
|
| Changed | Reference Type |
https://bugzilla.redhat.com/show_bug.cgi?id=1822077 No Types Assigned |
https://bugzilla.redhat.com/show_bug.cgi?id=1822077 Patch, Third Party Advisory |
| Changed | Reference Type |
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5 No Types Assigned |
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5 Release Notes, Third Party Advisory |
| Changed | Reference Type |
https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef No Types Assigned |
https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef Patch, Third Party Advisory |
| Changed | Reference Type |
https://lists.openwall.net/linux-kernel/2020/03/24/1803 No Types Assigned |
https://lists.openwall.net/linux-kernel/2020/03/24/1803 Exploit, Mailing List, Patch, Third Party Advisory |
| Changed | Reference Type |
https://www.openwall.com/lists/kernel-hardening/2020/03/25/1 No Types Assigned |
https://www.openwall.com/lists/kernel-hardening/2020/03/25/1 Exploit, Mailing List, Patch, Third Party Advisory |
CVE Modified by MITRE – 5/13/2020 3:15:11 AM
| Action | Type | Old Value | New Value |
|---|---|---|---|
| Added | Reference |
https://bugzilla.redhat.com/show_bug.cgi?id=1822077 [No Types Assigned] |
Quick Info
CVE Dictionary Entry:
CVE-2020-12826
NVD Published Date:
05/12/2020
NVD Last Modified:
05/14/2020