CVE-2021-46953
Last modified
CVE-2021-46953 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure When failing the driver probe because of invalid firmware properties, the GTDT driver unmaps the interrupt that it mapped earlier. However, it never checks whether the mapping of the interrupt actially succeeded. Even more, should the firmware report an illegal interrupt number that overlaps with the GIC SGI range, this can result in an IPI being unmapped, and subsequent fireworks (as reported by Dann Frazier). Rework the driver to have a slightly saner behaviour and actually check whether the interrupt has been mapped before unmapping things.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
Description
In the Linux kernel, the following vulnerability has been resolved: ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure When failing the driver probe because of invalid firmware properties, the GTDT driver unmaps the interrupt that it mapped earlier. However, it never checks whether the mapping of the interrupt actially succeeded. Even more, should the firmware report an illegal interrupt number that overlaps with the GIC SGI range, this can result in an IPI being unmapped, and subsequent fireworks (as reported by Dann Frazier). Rework the driver to have a slightly saner behaviour and actually check whether the interrupt has been mapped before unmapping things.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.12.0, < 4.14.233 |
| Linux | Linux Kernel | >= 4.15.0, < 4.19.191 |
| Linux | Linux Kernel | >= 4.20.0, < 5.4.118 |
| Linux | Linux Kernel | >= 5.5.0, < 5.10.36 |
| Linux | Linux Kernel | >= 5.11.0, < 5.11.20 |
| Linux | Linux Kernel | >= 5.12.0, < 5.12.3 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-46953?
How severe is CVE-2021-46953?
How do I fix CVE-2021-46953?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-46947In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2021-46948In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2021-46949In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2021-46950In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2021-46951In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2021-46952In the Linux kernel, the following vulnerability has been re…7.1
- CVE-2021-46954In the Linux kernel, the following vulnerability has been re…7.1
- CVE-2021-46955In the Linux kernel, the following vulnerability has been re…7.1
- CVE-2021-46956In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2021-46957In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2021-46958In the Linux kernel, the following vulnerability has been re…4.7
- CVE-2021-46959In the Linux kernel, the following vulnerability has been re…7.8
Are you affected by CVE-2021-46953?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST