Vulnerability DatabaseCVE-2019-20812
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CVE-2019-20812
June 03, 2020
An issue was discovered in the Linux kernel before 5.4.7. The prb_calc_retire_blk_tmo() function in net/packet/af_packet.c can result in a denial of service (CPU consumption and soft lockup) in a certain failure case involving TPACKET_V3, aka CID-b43d1f9f7067.
Related Resources (8)
https://access.redhat.com/security/cve/CVE-2019-20812
https://security-tracker.debian.org/tracker/CVE-2019-20812
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2019-20812
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.7
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b43d1f9f7067c6759b1051e8ecb84e82cef569fe
https://www.oracle.com/security-alerts/cpuApr2021.html
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CVSS v4
Base Score:
6.8
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.5
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
CVSS v2
Base Score:
4.9
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Weakness Type (CWE)
Uncontrolled Resource Consumption
CWE-400
EPSS
Base Score:
0.07