CVE-2021-20317

Published on: 09/27/2021 12:00:00 AM UTC

Last Modified on: 06/14/2022 11:15:00 AM UTC

CVE-2021-20317

Source: Mitre Source: NIST CVE.ORG Print: PDF PDF
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Certain versions of Debian Linux from Debian contain the following vulnerability:

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.

  • CVE-2021-20317 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.

CVSS3 Score: 4.4 - MEDIUM

Attack
Vector ⓘ		 Attack
Complexity		 Privileges
Required		 User
Interaction
LOCAL LOW HIGH NONE
Scope Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
UNCHANGED NONE NONE HIGH

CVSS2 Score: 4.9 - MEDIUM

Access
Vector ⓘ		 Access
Complexity		 Authentication
LOCAL LOW NONE
Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
NONE NONE COMPLETE

CVE References

Description Tags ⓘ Link
kernel/git/tip/tip.git - Unnamed repository; edit this file 'description' to name the repository. git.kernel.org
text/html
 URL Logo MISC git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d7061eda3eb1faf3f57dcc936ff75863f1
[SECURITY] [DLA 2941-1] linux-4.19 security update lists.debian.org
text/html
 URL Logo MLIST [debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security update
cert-portal.siemens.com
application/pdf
 URL Logo CONFIRM cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
2005258 – (CVE-2021-20317) CVE-2021-20317 kernel: timer tree corruption leads to missing wakeup and system freeze bugzilla.redhat.com
text/html
 URL Logo MISC bugzilla.redhat.com/show_bug.cgi?id=2005258
Debian -- Security Information -- DSA-5096-1 linux www.debian.org
Depreciated Link
text/html
 URL Logo DEBIAN DSA-5096
[SECURITY] [DLA 2843-1] linux security update lists.debian.org
text/html
 URL Logo MLIST [debian-lts-announce] 20211216 [SECURITY] [DLA 2843-1] linux security update
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Related QID Numbers

  • 159535 Oracle Enterprise Linux Security Update for kernel (ELSA-2021-4647)
  • 159760 Oracle Enterprise Linux Security Update for unbreakable enterprise kernel-container (ELSA-2022-9314)
  • 159763 Oracle Enterprise Linux Security Update for unbreakable enterprise kernel (ELSA-2022-9313)
  • 178943 Debian Security Update for linux (DLA 2843-1)
  • 179117 Debian Security Update for linux (DSA 5096-1)
  • 179119 Debian Security Update for linux-4.19 (DLA 2941-1)
  • 179946 Debian Security Update for linux (CVE-2021-20317)
  • 198617 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5209-1)
  • 239884 Red Hat Update for kernel (RHSA-2021:4647)
  • 239887 Red Hat Update for kernel-rt (RHSA-2021:4648)
  • 239890 Red Hat Update for kernel security (RHSA-2021:4650)
  • 239892 Red Hat Update for kernel-rt (RHSA-2021:4646)
  • 239917 Red Hat Update for kernel (RHSA-2021:4871)
  • 239918 Red Hat Update for kernel-rt (RHSA-2021:4875)
  • 352869 Amazon Linux Security Advisory for kernel: ALAS2-2021-1719
  • 353242 Amazon Linux Security Advisory for kernel : ALAC2012-2022-036
  • 353243 Amazon Linux Security Advisory for kmod-mlx5 : ALAC2012-2022-037
  • 353244 Amazon Linux Security Advisory for kmod-sfc : ALAC2012-2022-038
  • 590976 Siemens SCALANCE LPE9403 Third-Party Multiple Vulnerabilities (ICSA-22-167-09) (SSA-222547)
  • 940174 AlmaLinux Security Update for kernel (ALSA-2021:4647)
  • 960003 Rocky Linux Security Update for kernel-rt (RLSA-2021:4646)
  • 960094 Rocky Linux Security Update for kernel (RLSA-2021:4647)

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Operating
System		DebianDebian Linux10.0AllAllAll
Operating
System		DebianDebian Linux9.0AllAllAll
Operating
System		LinuxLinux KernelAllAllAllAll
Operating
System		LinuxLinux Kernel5.4-AllAll
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*:
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*:
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*:
  • cpe:2.3:o:linux:linux_kernel:5.4:-:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-20317 : A flaw was found in the #Linux #kernel. A corrupted timer tree caused the task wakeup to be missin… twitter.com/i/web/status/1… 2021-09-27 11:07:55
Reddit Logo Icon /r/synology DSM Version: 7.1.1-42951 (Release Candidate) 2022-08-10 06:07:14
Reddit Logo Icon /r/synology Has anyone seen the release notes for the latest DSM 7.1.1 Release Candidate. Fixes a scary amount of CVEs. 2022-08-16 14:26:29
Reddit Logo Icon /r/synology DSM 7.1.1-42962 released! 2022-09-05 11:39:36
Reddit Logo Icon /r/asustor ADM 4.1.0.RLQ1 update available (2022-09-28) 2022-10-08 04:00:04
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