7.2
CVSSv2

CVE-2020-25221

Published: 10/09/2020 Updated: 02/02/2023
CVSS v2 Base Score: 7.2 | Impact Score: 10 | Exploitability Score: 3.9
CVSS v3 Base Score: 7.8 | Impact Score: 5.9 | Exploitability Score: 1.8
VMScore: 643
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Summary

get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x prior to 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.

Vulnerability Trend

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linux linux kernel

netapp cloud backup -

netapp solidfire \\& hci management node -

netapp hci compute node -

netapp solidfire baseboard management controller -

netapp solidfire\\, enterprise sds \\& hci storage node -

Mailing Lists

<!--X-Body-Begin--> <!--X-User-Header--> oss-sec mailing list archives <!--X-User-Header-End--> <!--X-TopPNI--> By Date By Thread </form> <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> Re: CVE Request: Linux kernel vsyscall page refcounting error <!--X-Subject-Header-End--> <!--X-Head-of-Message--> From: Sal ...