CVE-2020-12826

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.

CVSS v3.0 5.3 MEDIUM
CVSS v2.0 4.4 MEDIUM

5.3^/10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

4.4^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:L/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 3.4 / Impact : 6.4

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5	Release Notes Third Party Advisory
https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef	Patch Third Party Advisory
https://www.openwall.com/lists/kernel-hardening/2020/03/25/1	Exploit Mailing List Patch Third Party Advisory
https://lists.openwall.net/linux-kernel/2020/03/24/1803	Exploit Mailing List Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1822077	Issue Tracking Patch Third Party Advisory
https://usn.ubuntu.com/4367-1/	Third Party Advisory
https://usn.ubuntu.com/4369-1/
https://security.netapp.com/advisory/ntap-20200608-0001/
https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
https://usn.ubuntu.com/4391-1/

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:redhat:enterprise_mrg:2.0:::::::*
	cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts:::
	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:::::::*

Information

Published : 2020-05-12 12:15

Updated : 2021-07-15 12:16

NVD link : CVE-2020-12826

Mitre link : CVE-2020-12826

JSON object : View

CWE

CWE-190

Integer Overflow or Wraparound

Products Affected

redhat

enterprise_mrg
enterprise_linux

canonical

ubuntu_linux

linux

linux_kernel

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5.3 /10