Vulnerability Description
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
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.4 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2005258Issue TrackingThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d70PatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing ListThird Party Advisory
- https://www.debian.org/security/2022/dsa-5096Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2005258Issue TrackingThird Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d70PatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing ListThird Party Advisory
- https://www.debian.org/security/2022/dsa-5096Third Party Advisory
FAQ
What is CVE-2021-20317?
CVE-2021-20317 is a vulnerability with a CVSS score of 4.4 (MEDIUM). 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 use...
How severe is CVE-2021-20317?
CVE-2021-20317 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-20317?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.