Security Digest · Vulnerability record · Known exploited
CVE-2025-48543: Android Runtime Use-After-Free Vulnerability
Exploited in the wild (CISA KEV). In multiple locations, there is a possible way to escape chrome sandbox to attack android systemserver due to a use after free.
CISA KEV · added 2025-09-04 CVSS 8.8 High EPSS 0.6% · p50
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run Android Runtime. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-09-04, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-09-25; treat that as the outer limit, not the target.
- EPSS 0.6%, percentile 50: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 50% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.
What it is
In multiple locations, there is a possible way to escape chrome sandbox to attack android systemserver due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
CISA’s summary
Android Runtime contains a use-after-free vulnerability potentially allowing a chrome sandbox escape leading to local privilege escalation.
Weakness type: CWE-416.
Product: Android Runtime · Assigned by: google_android · Published: 2025-09-04
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Android | 16, 15, 14, 13 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 8.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
- Attack vector: local access needed
- Attack complexity: low
- Privileges required: low (any account)
- User interaction: none
- Scope: changed (can affect other components)
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2025-09-04; federal due date 2025-09-25. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 0.63% probability of exploitation activity in the next 30 days; percentile 50.
Timeline
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CVE record published by google_android
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- Listed in CISA KEV notes (source.android.com) source.android.com
Vulnerability records
- CVE.org record CVE-2025-48543 cve.org
- NVD entry CVE-2025-48543 nvd.nist.gov
Government
Other references from the CVE record and advisory
- android.googlesource.com android.googlesource.com
- source.android.com source.android.com
All exploited Android vulnerabilities · Today’s Security Digest