CVE-2021-1905
Published: November 3, 2021
Official Description
Multiple Qualcomm Chipsets contain a use after free vulnerability due to improper handling of memory mapping of multiple processes simultaneously.
CISA KEV Advisory
Qualcomm Multiple Chipsets Use-After-Free Vulnerability
Multiple Qualcomm Chipsets contain a use after free vulnerability due to improper handling of memory mapping of multiple processes simultaneously.
Apply updates per vendor instructions.
Risk Analysis
This high-severity use-after-free vulnerability in multiple Qualcomm Chipsets stems from improper memory mapping when multiple processes run simultaneously. Its presence in CISA's KEV catalog and confirmed in-the-wild exploitation indicate a critical need for immediate attention, despite a low EPSS score.
This vulnerability is actively exploited in the wild and is included in CISA's Known Exploited Vulnerabilities catalog.
Apply all available security updates for Qualcomm chipsets to address this memory handling flaw. Ensure all system software is kept up-to-date to mitigate known vulnerabilities.
Technical Analysis
CVE-2021-1905 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2021-1905 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-1905 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1