CVE-2025-21456 | Use After Free in NPU

Memory corruption while processing IOCTL command when multiple threads are called to map/unmap buffer concurrently.

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

CVE-2025-21456 is rated Low Risk (38.6/100): CVSS High severity, with low exploitation likelihood (EPSS 0.07%). 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-2025-21456

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 2026-06-02 0.01% 0.07% +0.05%
2 2025-08-06 — 0.01% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-21456

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-2025-21456

Affected software / configurations for CVE-2025-21456

Vendor Product Version Raw CPE
qualcomm ar8035_firmware — cpe:2.3:o:qualcomm:ar8035_firmware:-:*:*:*:*:*:*:*
qualcomm c-v2x_9150_firmware — cpe:2.3:o:qualcomm:c-v2x_9150_firmware:-:*:*:*:*:*:*:*
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 qam8255p_firmware — cpe:2.3:o:qualcomm:qam8255p_firmware:-:*:*:*:*:*:*:*
qualcomm qam8295p_firmware — cpe:2.3:o:qualcomm:qam8295p_firmware:-:*:*:*:*:*:*:*
qualcomm qam8650p_firmware — cpe:2.3:o:qualcomm:qam8650p_firmware:-:*:*:*:*:*:*:*
qualcomm qam8775p_firmware — cpe:2.3:o:qualcomm:qam8775p_firmware:-:*:*:*:*:*:*:*
qualcomm qca6174a_firmware — cpe:2.3:o:qualcomm:qca6174a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6574au_firmware — cpe:2.3:o:qualcomm:qca6574au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6584au_firmware — cpe:2.3:o:qualcomm:qca6584au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6696_firmware — cpe:2.3:o:qualcomm:qca6696_firmware:-:*:*:*:*:*:*:*
qualcomm qca6698aq_firmware — cpe:2.3:o:qualcomm:qca6698aq_firmware:-:*:*:*:*:*:*:*
qualcomm qca6797aq_firmware — cpe:2.3:o:qualcomm:qca6797aq_firmware:-:*:*:*:*:*:*:*
qualcomm qca8081_firmware — cpe:2.3:o:qualcomm:qca8081_firmware:-:*:*:*:*:*:*:*
qualcomm qca8337_firmware — cpe:2.3:o:qualcomm:qca8337_firmware:-:*:*:*:*:*:*:*
qualcomm qcc710_firmware — cpe:2.3:o:qualcomm:qcc710_firmware:-:*:*:*:*:*:*:*
qualcomm qcn6224_firmware — cpe:2.3:o:qualcomm:qcn6224_firmware:-:*:*:*:*:*:*:*
qualcomm qcn6274_firmware — cpe:2.3:o:qualcomm:qcn6274_firmware:-:*:*:*:*:*:*:*
qualcomm qcs410_firmware — cpe:2.3:o:qualcomm:qcs410_firmware:-:*:*:*:*:*:*:*
qualcomm qcs610_firmware — cpe:2.3:o:qualcomm:qcs610_firmware:-:*:*:*:*:*:*:*
qualcomm qfw7114_firmware — cpe:2.3:o:qualcomm:qfw7114_firmware:-:*:*:*:*:*:*:*
qualcomm qfw7124_firmware — cpe:2.3:o:qualcomm:qfw7124_firmware:-:*:*:*:*:*:*:*
qualcomm video_collaboration_vc1_platform_firmware — cpe:2.3:o:qualcomm:video_collaboration_vc1_platform_firmware:-:*:*:*:*:*:*:*
qualcomm video_collaboration_vc3_platform_firmware — cpe:2.3:o:qualcomm:video_collaboration_vc3_platform_firmware:-:*:*:*:*:*:*:*
qualcomm sa6145p_firmware — cpe:2.3:o:qualcomm:sa6145p_firmware:-:*:*:*:*:*:*:*
qualcomm sa6150p_firmware — cpe:2.3:o:qualcomm:sa6150p_firmware:-:*:*:*:*:*:*:*
qualcomm sa6155p_firmware — cpe:2.3:o:qualcomm:sa6155p_firmware:-:*:*:*:*:*:*:*
qualcomm sa7255p_firmware — cpe:2.3:o:qualcomm:sa7255p_firmware:-:*:*:*:*:*:*:*
qualcomm sa7775p_firmware — cpe:2.3:o:qualcomm:sa7775p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8145p_firmware — cpe:2.3:o:qualcomm:sa8145p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8150p_firmware — cpe:2.3:o:qualcomm:sa8150p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8155p_firmware — cpe:2.3:o:qualcomm:sa8155p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8195p_firmware — cpe:2.3:o:qualcomm:sa8195p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8255p_firmware — cpe:2.3:o:qualcomm:sa8255p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8295p_firmware — cpe:2.3:o:qualcomm:sa8295p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8530p_firmware — cpe:2.3:o:qualcomm:sa8530p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8540p_firmware — cpe:2.3:o:qualcomm:sa8540p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8620p_firmware — cpe:2.3:o:qualcomm:sa8620p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8650p_firmware — cpe:2.3:o:qualcomm:sa8650p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8775p_firmware — cpe:2.3:o:qualcomm:sa8775p_firmware:-:*:*:*:*:*:*:*
qualcomm sa9000p_firmware — cpe:2.3:o:qualcomm:sa9000p_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_888_5g_mobile_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_888_5g_mobile_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_888\+_5g_mobile_platform_\(sm8350-ac\)_firmware — cpe:2.3:o:qualcomm:snapdragon_888\+_5g_mobile_platform_\(sm8350-ac\)_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_auto_5g_modem-rf_gen_2_firmware — cpe:2.3:o:qualcomm:snapdragon_auto_5g_modem-rf_gen_2_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_w5\+_gen_1_wearable_platform_firmware — cpe:2.3:o:qualcomm:snapdragon_w5\+_gen_1_wearable_platform_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_x72_5g_modem-rf_system_firmware — cpe:2.3:o:qualcomm:snapdragon_x72_5g_modem-rf_system_firmware:-:*:*:*:*:*:*:*
qualcomm snapdragon_x75_5g_modem-rf_system_firmware — cpe:2.3:o:qualcomm:snapdragon_x75_5g_modem-rf_system_firmware:-:*:*:*:*:*:*:*
qualcomm sw5100_firmware — cpe:2.3:o:qualcomm:sw5100_firmware:-:*:*:*:*:*:*:*
qualcomm sw5100p_firmware — cpe:2.3:o:qualcomm:sw5100p_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9340_firmware — cpe:2.3:o:qualcomm:wcd9340_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9341_firmware — cpe:2.3:o:qualcomm:wcd9341_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9370_firmware — cpe:2.3:o:qualcomm:wcd9370_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9380_firmware — cpe:2.3:o:qualcomm:wcd9380_firmware:-:*:*:*:*:*:*:*
qualcomm wcd9385_firmware — cpe:2.3:o:qualcomm:wcd9385_firmware:-:*:*:*:*:*:*:*
qualcomm wcn3660b_firmware — cpe:2.3:o:qualcomm:wcn3660b_firmware:-:*:*:*:*:*:*:*
qualcomm wcn3680b_firmware — cpe:2.3:o:qualcomm:wcn3680b_firmware:-:*:*:*:*:*:*:*
qualcomm wcn3950_firmware — cpe:2.3:o:qualcomm:wcn3950_firmware:-:*:*:*:*:*:*:*
qualcomm wcn3980_firmware — cpe:2.3:o:qualcomm:wcn3980_firmware:-:*:*:*:*:*:*:*
qualcomm wcn3988_firmware — cpe:2.3:o:qualcomm:wcn3988_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8810_firmware — cpe:2.3:o:qualcomm:wsa8810_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8815_firmware — cpe:2.3:o:qualcomm:wsa8815_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8830_firmware — cpe:2.3:o:qualcomm:wsa8830_firmware:-:*:*:*:*:*:*:*
qualcomm wsa8835_firmware — cpe:2.3:o:qualcomm:wsa8835_firmware:-:*:*:*:*:*:*:*

References for CVE-2025-21456

cvelogic Threat Intelligence