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CVE-2021-20317

Date: September 27, 2021

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.

Severity Score

Related Resources (11)

https://nvd.nist.gov/vuln/detail/CVE-2021-20317
https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d7061eda3eb1faf3f57dcc936ff75863f1
https://access.redhat.com/security/cve/CVE-2021-20317
https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
https://bugzilla.redhat.com/show_bug.cgi?id=2005258
https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
https://www.debian.org/security/2022/dsa-5096
https://security-tracker.debian.org/tracker/CVE-2021-20317
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-20317
https://www.mend.io/vulnerability-database/CVE-2021-20317

Severity Score

Weakness Type (CWE)

Improper Initialization

CWE-665

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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