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CVE
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CVE-2019-20812Date: (C)2020-06-03   (M)2024-06-11


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 5.5CVSS Score : 4.9
Exploit Score: 1.8Exploit Score: 3.9
Impact Score: 3.6Impact Score: 6.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: LOCAL
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: LOWAuthentication: NONE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: COMPLETE
Integrity: NONE 
Availability: HIGH 
  
Reference:
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
openSUSE-SU-2020:0801
openSUSE-SU-2020:0935

CPE    1
cpe:/o:linux:linux_kernel
CWE    1
CWE-400
OVAL    16
oval:org.secpod.oval:def:89000665
oval:org.secpod.oval:def:89000642
oval:org.secpod.oval:def:1503035
oval:org.secpod.oval:def:1503036
...

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