Vulnerability Description
get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.7.0, < 5.8.7 |
| Netapp | Cloud Backup | - |
| Netapp | Solidfire\, Enterprise Sds \& Hci Storage Node | - |
| Netapp | Solidfire \& Hci Management Node | - |
| Netapp | Hci Compute Node | - |
| Netapp | Solidfire Baseboard Management Controller | - |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2020/09/10/4Mailing ListThird Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7Release NotesVendor Advisory
- https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73aIssue TrackingPatchVendor Advisory
- https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2Issue TrackingPatchVendor Advisory
- https://security.netapp.com/advisory/ntap-20201001-0003/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/09/08/4Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2020/09/10/4Mailing ListThird Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7Release NotesVendor Advisory
- https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73aIssue TrackingPatchVendor Advisory
- https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2Issue TrackingPatchVendor Advisory
- https://security.netapp.com/advisory/ntap-20201001-0003/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/09/08/4Mailing ListPatchThird Party Advisory
FAQ
What is CVE-2020-25221?
CVE-2020-25221 is a vulnerability with a CVSS score of 7.8 (HIGH). get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that...
How severe is CVE-2020-25221?
CVE-2020-25221 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-25221?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Netapp Cloud Backup, Netapp Solidfire\, Enterprise Sds \& Hci Storage Node, Netapp Solidfire \& Hci Management Node, Netapp Hci Compute Node.