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CVE
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CVE-2021-20317Date: (C)2021-09-27   (M)2024-04-26


A flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running OSP.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 4.4CVSS Score : 4.9
Exploit Score: 0.8Exploit 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: HIGHAuthentication: NONE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: COMPLETE
Integrity: NONE 
Availability: HIGH 
  
Reference:
DSA-5096
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
https://bugzilla.redhat.com/show_bug.cgi?id=2005258
https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d7061eda3eb1faf3f57dcc936ff75863f1

CPE    2
cpe:/o:debian:debian_linux:9.0
cpe:/o:linux:linux_kernel
CWE    1
CWE-665
OVAL    14
oval:org.secpod.oval:def:2500228
oval:org.secpod.oval:def:506573
oval:org.secpod.oval:def:1505580
oval:org.secpod.oval:def:4500078
...

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