CVE-2020-25669
HIGHCVSS 7.8/10EPSS 0.63%
Last modified
CVE-2020-25669 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.. EPSS estimates a 0.63% chance of exploitation in the next 30 days.
Description
A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 4.4.245 |
| Linux | Linux Kernel | >= 4.5, < 4.9.245 |
| Linux | Linux Kernel | >= 4.10, < 4.14.208 |
| Linux | Linux Kernel | >= 4.15, < 4.19.159 |
| Linux | Linux Kernel | >= 4.20, < 5.4.79 |
| Linux | Linux Kernel | >= 5.5, < 5.9.10 |
| Debian | Debian Linux | 9.0 |
| Netapp | Cloud Backup | All versions |
| Netapp | Solidfire \& Hci Management Node | All versions |
| Netapp | Solidfire Baseboard Management Controller | All versions |
| Netapp | H300s Firmware | All versions |
| Netapp | H500s Firmware | All versions |
| Netapp | H700s Firmware | All versions |
| Netapp | H300e Firmware | All versions |
| Netapp | H500e Firmware | All versions |
| Netapp | H700e Firmware | All versions |
| Netapp | H410s Firmware | All versions |
| Netapp | H410c Firmware | All versions |
References
- http://www.openwall.com/lists/oss-security/2020/11/05/2Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/11/20/5Exploit, Mailing List, Third Party Advisory
- https://github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7ePatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210702-0006/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/11/05/2Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/11/20/5Exploit, Mailing List, Third Party Advisory
- https://github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7ePatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210702-0006/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-25669?
A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.
How severe is CVE-2020-25669?
CVE-2020-25669 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.
How do I fix CVE-2020-25669?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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.
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Are you affected by CVE-2020-25669?
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