CVE-2020-29369
HIGHCVSS 7/10EPSS 0.45%
Last modified
CVE-2020-29369 is a high-severity vulnerability rated 7/10 on the CVSS scale. An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.. EPSS estimates a 0.45% chance of exploitation in the next 30 days.
Description
An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.
Metrics
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.20, < 5.4.54 |
| Linux | Linux Kernel | >= 5.5, < 5.7.11 |
| Netapp | Hci Management Node | All versions |
| Netapp | Solidfire | All versions |
| Netapp | Hci Compute Node | All versions |
| Netapp | Hci Storage Node | All versions |
References
- http://www.openwall.com/lists/oss-security/2021/02/10/6Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/02/19/8Mailing List, Patch, Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2056Exploit, Issue Tracking, Patch, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.11Release Notes, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20210115-0001/Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/02/10/6Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/02/19/8Mailing List, Patch, Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2056Exploit, Issue Tracking, Patch, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.11Release Notes, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20210115-0001/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-29369?
An issue was discovered in mm/mmap.c in the Linux kernel before 5.7.11. There is a race condition between certain expand functions (expand_downwards and expand_upwards) and page-table free operations from an munmap call, aka CID-246c320a8cfe.
How severe is CVE-2020-29369?
CVE-2020-29369 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.
How do I fix CVE-2020-29369?
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-2020-29369?
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