Threats / Qualcomm / CVE-2021-1905
CVE-2021-1905
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Qualcomm Multiple Chipsets vulnerability
Multiple Qualcomm chipsets contain a use-after-free vulnerability in memory mapping that affects simultaneous multi-process handling. The flaw has been exploited in the wild.
Verdict
Today item — known-exploited.
A use-after-free in Qualcomm chipset memory management enables local privilege escalation or code execution when multiple processes access mapped memory concurrently. Active exploitation demonstrates practical attack feasibility.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
3 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03).
Probability (EPSS)
EPSS 0.0115 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Qualcomm, Multiple Chipsets. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-416 Use After Free — weakness family: Memory safety.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a multi-process application that triggers concurrent memory mapping operations on the vulnerable chipset to cause a use-after-free condition.
Business
Attackers gain arbitrary code execution with elevated privileges on affected devices, compromising confidentiality and integrity of user data.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I exploit the freed memory region to read or modify sensitive kernel or process data before the system detects the corruption.
Business
Device security boundaries collapse, enabling lateral movement to other system components and persistent compromise of the mobile or IoT platform.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05