VDB
DEBIAN-CVE-2020-25221
DEBIAN-CVE-2020-25221
PUBLISHED
CVSS 7.800000190734863 HIGH
Record from OSV · Published September 10, 2020
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| linux | Debian:14 | 5.8.7-1 |
| linux | Debian:12 | 5.8.7-1 |
| linux | Debian:13 | 5.8.7-1 |
Risk scores
CVSS 3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | linux | 0 |
| Debian:12 | linux | 0 |
| Debian | linux | |
| Debian:13 | linux | 0 |
Timeline
- Sep 10, 2020 CVE Published
- Oct 26, 2026 CVE Updated
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln DEBIAN-CVE-2020-25221
vulnetix vdb fixes DEBIAN-CVE-2020-25221Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/DEBIAN-CVE-2020-25221/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart