# CVE-2026-20971 — Samsung Mobile Devices

> As of 2026-02-26, CVE-2026-20971 is a HIGH-severity vulnerability in Samsung Mobile Devices, CVSS v3.1 7.8, EPSS 0.1% (2.7th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-20971, most recently “CVE-2026-20971: Eight-Year-Old Samsung Knox PROCA/FIVE Kernel Use-After-Free in /proc/pid/integrity Handlers”.

**Last updated:** 2026-02-26

## What is CVE-2026-20971?

Use After Free in PROCA driver prior to SMR Jan-2026 Release 1 allows local attackers to potentially execute arbitrary code.

The record classifies CVE-2026-20971 under weakness class [CWE-416](https://intel.threadlinqs.com/cwe/CWE-416). Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 269 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.8 — HIGH (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **CVSS v4.0 base score:** 7.3 (`CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 2.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-01-09, last modified 2026-02-26

## Is CVE-2026-20971 being exploited?

No public exploitation evidence for CVE-2026-20971 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-02-26. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- **Samsung Mobile**: Devices

## How to fix CVE-2026-20971

Vendor advisory: [https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=01](https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=01). Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

## Threat activity tracking CVE-2026-20971

1 tracked threat in the Threadlinqs corpus references CVE-2026-20971, either in the campaign’s CVE list or as an indicator on the campaign record.

- [CVE-2026-20971: Eight-Year-Old Samsung Knox PROCA/FIVE Kernel Use-After-Free in /proc/pid/integrity Handlers](https://intel.threadlinqs.com/threat/TL-2026-0925) — HIGH · 2026-06-24

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-06-25. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [security.samsungmobile.com](https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=01)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-20971
Full detection coverage and IOCs for threats exploiting CVE-2026-20971 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp