CVE-2025-21485 | Time-of-check Time-of-use (TOCTOU) Race Condition in DSP Service

Memory corruption while processing INIT and multimode invoke IOCTL calls on FastRPC.

Published: 2025-06-03 Last update: 2025-08-20 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-21485 is rated Low Risk (37/100): CVSS High severity, with low exploitation likelihood (EPSS 0.05%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-21485

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-30 0.01% 0.05% +0.04%
2 2025-06-03 — 0.01% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-21485

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]

Weakness enumeration for CVE-2025-21485

Affected software / configurations for CVE-2025-21485

Vendor Product Version Raw CPE
qualcomm fastconnect_6900_firmware — cpe:2.3:o:qualcomm:fastconnect_6900_firmware:-:*:*:*:*:*:*:*
qualcomm fastconnect_7800_firmware — cpe:2.3:o:qualcomm:fastconnect_7800_firmware:-:*:*:*:*:*:*:*
qualcomm qmp1000_firmware — cpe:2.3:o:qualcomm:qmp1000_firmware:-:*:*:*:*:*:*:*
qualcomm sm8735_firmware — cpe:2.3:o:qualcomm:sm8735_firmware:-:*:*:*:*:*:*:*
qualcomm sm8750_firmware — cpe:2.3:o:qualcomm:sm8750_firmware:-:*:*:*:*:*:*:*
qualcomm sm8750p_firmware — cpe:2.3:o:qualcomm:sm8750p_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_8_gen_3_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_8_gen_3_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_w5\+_gen_1_wearable_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_w5\+_gen_1_wearable_platform_firmware:-:*:*:*:*:*:*:*
qualcomm sw5100_firmware — cpe:2.3:o:qualcomm:sw5100_firmware:-:*:*:*:*:*:*:*
qualcomm sw5100p_firmware — cpe:2.3:o:qualcomm:sw5100p_firmware:-:*:*:*:*:*:*:*
qualcomm sxr2230p_firmware — cpe:2.3:o:qualcomm:sxr2230p_firmware:-:*:*:*:*:*:*:*
qualcomm sxr2250p_firmware — cpe:2.3:o:qualcomm:sxr2250p_firmware:-:*:*:*:*:*:*:*
qualcomm sxr2330p_firmware — cpe:2.3:o:qualcomm:sxr2330p_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9378_firmware — cpe:2.3:o:qualcomm:wcd9378_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9380_firmware — cpe:2.3:o:qualcomm:wcd9380_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9385_firmware — cpe:2.3:o:qualcomm:wcd9385_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9390_firmware — cpe:2.3:o:qualcomm:wcd9390_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9395_firmware — cpe:2.3:o:qualcomm:wcd9395_firmware:-:*:*:*:*:*:*:*
qualcomm wcn7750_firmware — cpe:2.3:o:qualcomm:wcn7750_firmware:-:*:*:*:*:*:*:*
qualcomm wcn7860_firmware — cpe:2.3:o:qualcomm:wcn7860_firmware:-:*:*:*:*:*:*:*
qualcomm wcn7861_firmware — cpe:2.3:o:qualcomm:wcn7861_firmware:-:*:*:*:*:*:*:*
qualcomm wcn7880_firmware — cpe:2.3:o:qualcomm:wcn7880_firmware:-:*:*:*:*:*:*:*
qualcomm wcn7881_firmware — cpe:2.3:o:qualcomm:wcn7881_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8830_firmware — cpe:2.3:o:qualcomm:wsa8830_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8832_firmware — cpe:2.3:o:qualcomm:wsa8832_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8835_firmware — cpe:2.3:o:qualcomm:wsa8835_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8840_firmware — cpe:2.3:o:qualcomm:wsa8840_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8845_firmware — cpe:2.3:o:qualcomm:wsa8845_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8845h_firmware — cpe:2.3:o:qualcomm:wsa8845h_firmware:-:*:*:*:*:*:*:*

References for CVE-2025-21485

cvelogic Threat Intelligence