What is CVE-2026-21385?
Memory corruption while using alignments for memory allocation.
The record classifies CVE-2026-21385 under weakness class CWE-190. 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. 474 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 245 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 - EPSS (FIRST)
- 1.2% probability of exploitation in the next 30 days, higher than 68.8% of all scored CVEs
- CISA KEV
- Listed since 2026-03-03, federal remediation deadline 2026-03-24
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2026-03-02, last modified 2026-03-04
Is CVE-2026-21385 being exploited?
CISA added CVE-2026-21385 to the Known Exploited Vulnerabilities catalog on 2026-03-03, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-03-24 under BOD 22-01. Weaponised exploit code for CVE-2026-21385 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.
Affected products and versions
- Qualcomm: Sm7675p Firmware, Sm7675p, Sm8475p Firmware, Sm8475p, Sm8550p Firmware, Sm8550p, Sm8635 Firmware, Sm8635, Sm8635p Firmware, Sm8635p, Sm8650q Firmware, Sm8650q, Sm8750p Firmware, Sm8750p, Smart Audio 400 Platform Firmware, Smart Audio 400 Platform, Smart Display 200 Platform Firmware, Smart Display 200 Platform, Snapdragon 4 Gen 1 Mobile Platform Firmware, Snapdragon 4 Gen 1 Mobile Platform, Snapdragon 4 Gen 2 Mobile Platform Firmware, Snapdragon 4 Gen 2 Mobile Platform, Snapdragon 429 Mobile Platform Firmware, Snapdragon 429 Mobile Platform, Snapdragon 460 Mobile Platform Firmware
Showing 25 of 474 recorded product entries.
How to fix CVE-2026-21385
The record marks a vendor fix as available for CVE-2026-21385. Patch reference: https://source.android.com/docs/security/bulletin/2026/2026-03-01. Vendor advisory: https://docs.qualcomm.com/product/publicresources/securitybulletin/march-2026-bulletin.html. Because CVE-2026-21385 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-03-24. 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-2026-21385
1 tracked threat in the Threadlinqs corpus references CVE-2026-21385, either in the campaign’s CVE list or as an indicator on the campaign record.
- Qualcomm Adreno GPU KGSL Integer Overflow Memory Corruption Zero-Day (CVE-2026-21385) — CRITICAL · 2026-03-06
Sources
Enriched from CVE.org, FIRST EPSS, CISA KEV, public proof-of-concept repositories. Last verified by Threadlinqs on .