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Vulnerability record · CVE-2025-21455 · published 6 August 2025

CVE-2025-21455: Qualcomm fastconnect 6800 firmware toctou race condition vulnerability

Qualcomm · Fastconnect 6800 Firmware

Memory corruption while submitting blob data to kernel space though IOCTL.

7.8 CVSS 3.1 High EPSS 0.07% · top 99.9% CWE-367 · TOCTOU race condition
7.8CVSS 3.1 base score
0.07%EPSS exploitation probability, 30 days
NoNot in CISA KEV
29Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

Memory corruption while submitting blob data to kernel space though IOCTL.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

29 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://docs.qualcomm.com/product/publicresources/securitybulletin/august-2025-bulletin.html Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.6CVE-2025-21479Qualcomm GPU micronode memory corruption via unauthorized command executionQualcomm chipsets contain an incorrect authorization flaw in the GPU micronode that allows memory corruption when a specific sequence of commands is …KEVEPSS 0.84%analysed8.6CVE-2025-21480Qualcomm GPU micronode memory corruption via unauthorized command executionA memory corruption flaw in Qualcomm's GPU micronode is caused by incorrect authorization (CWE-863), allowing an unauthorized command sequence to be …KEVEPSS 0.46%analysed7.8CVE-2026-21385Qualcomm chipset firmware memory corruption via alignment integer overflowA memory corruption flaw in Qualcomm chipset firmware arises from an integer overflow when alignments are used for memory allocation (CWE-190). It af…KEVEPSS 1.2%analysed7.8CVE-2024-43047Qualcomm chipset firmware use-after-free in HLOS memory map handlingA use-after-free (CWE-416) in Qualcomm chipset firmware occurs while maintaining memory maps of HLOS memory, leading to memory corruption. It affects…KEVEPSS 0.67%analysed7.8CVE-2023-33106Qualcomm GPU AUX Command Sync Point Memory CorruptionCVE-2023-33106 is a memory corruption flaw in Qualcomm chipsets triggered when a large list of sync points is submitted in an AUX command to the IOCT…KEVEPSS 0.92%analysed7.8CVE-2023-33107Qualcomm Graphics Linux integer overflow memory corruptionCVE-2023-33107 is an integer overflow (CWE-190) in Qualcomm Graphics Linux that causes memory corruption when a shared virtual memory region is assig…KEVEPSS 0.89%analysed7.8CVE-2023-33063Qualcomm DSP Services use-after-free memory corruptionCVE-2023-33063 is a use-after-free memory corruption flaw in Qualcomm DSP Services, triggered during a remote call from the high-level operating syst…KEVEPSS 0.69%analysed7.8CVE-2022-22071Qualcomm chipset shell memory use-after-free via IOCTL munmapA use-after-free exists in Qualcomm Snapdragon and related chipset firmware when process shell memory is freed through an IOCTL munmap call while pro…KEVEPSS 0.46%analysed

Source: NIST National Vulnerability Database (record CVE-2025-21455), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.