CVE-2023-21666 | Improper Release of Memory Before Removing Last Reference (`Memory Leak`) in Graphics

Memory Corruption in Graphics while accessing a buffer allocated through the graphics pool.

Published: 2023-05-02 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-21666 is rated Low Risk (36.4/100): CVSS High severity, with low exploitation likelihood (EPSS 0.18%). 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-2023-21666

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 2026-06-15 0.06% 0.18% +0.12%
2 2025-11-21 0.05% 0.06% +0.01%
3 2025-11-18 — 0.05% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-21666

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.4 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/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:N)
No account or special rights needed—anonymous or random user is enough.
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.
 2.5 5.9 [email protected]
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-2023-21666

Affected software / configurations for CVE-2023-21666

Vendor Product Version Raw CPE
qualcomm wcn3998_firmware — cpe:2.3:o:qualcomm:wcn3998_firmware:-:*:*:*:*:*:*:*
qualcomm qca6390_firmware — cpe:2.3:o:qualcomm:qca6390_firmware:-:*:*:*:*:*:*:*
qualcomm wcn685x-5_firmware — cpe:2.3:o:qualcomm:wcn685x-5_firmware:-:*:*:*:*:*:*:*
qualcomm wcn685x-1_firmware — cpe:2.3:o:qualcomm:wcn685x-1_firmware:-:*:*:*:*:*:*:*
qualcomm flight_rb5_5g_platform_firmware — cpe:2.3:o:qualcomm:flight_rb5_5g_platform_firmware:-:*:*:*:*:*:*:*
qualcomm home_hub_100_platform_firmware — cpe:2.3:o:qualcomm:home_hub_100_platform_firmware:-:*:*:*:*:*:*:*
qualcomm mdm9250_firmware — cpe:2.3:o:qualcomm:mdm9250_firmware:-:*:*:*:*:*:*:*
qualcomm mdm9628_firmware — cpe:2.3:o:qualcomm:mdm9628_firmware:-:*:*:*:*:*:*:*
qualcomm mdm9650_firmware — cpe:2.3:o:qualcomm:mdm9650_firmware:-:*:*:*:*:*:*:*
qualcomm msm8108_firmware — cpe:2.3:o:qualcomm:msm8108_firmware:-:*:*:*:*:*:*:*
qualcomm msm8209_firmware — cpe:2.3:o:qualcomm:msm8209_firmware:-:*:*:*:*:*:*:*
qualcomm msm8608_firmware — cpe:2.3:o:qualcomm:msm8608_firmware:-:*:*:*:*:*:*:*
qualcomm msm8909w_firmware — cpe:2.3:o:qualcomm:msm8909w_firmware:-:*:*:*:*:*:*:*
qualcomm qca6174_firmware — cpe:2.3:o:qualcomm:qca6174_firmware:-:*:*:*:*:*:*:*
qualcomm qca6174a_firmware — cpe:2.3:o:qualcomm:qca6174a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6310_firmware — cpe:2.3:o:qualcomm:qca6310_firmware:-:*:*:*:*:*:*:*
qualcomm qca6320_firmware — cpe:2.3:o:qualcomm:qca6320_firmware:-:*:*:*:*:*:*:*
qualcomm qca6335_firmware — cpe:2.3:o:qualcomm:qca6335_firmware:-:*:*:*:*:*:*:*
qualcomm qca6391_firmware — cpe:2.3:o:qualcomm:qca6391_firmware:-:*:*:*:*:*:*:*
qualcomm qca6420_firmware — cpe:2.3:o:qualcomm:qca6420_firmware:-:*:*:*:*:*:*:*
qualcomm qca6421_firmware — cpe:2.3:o:qualcomm:qca6421_firmware:-:*:*:*:*:*:*:*
qualcomm qca6426_firmware — cpe:2.3:o:qualcomm:qca6426_firmware:-:*:*:*:*:*:*:*
qualcomm qca6430_firmware — cpe:2.3:o:qualcomm:qca6430_firmware:-:*:*:*:*:*:*:*
qualcomm qca6431_firmware — cpe:2.3:o:qualcomm:qca6431_firmware:-:*:*:*:*:*:*:*
qualcomm qca6436_firmware — cpe:2.3:o:qualcomm:qca6436_firmware:-:*:*:*:*:*:*:*
qualcomm qca6564_firmware — cpe:2.3:o:qualcomm:qca6564_firmware:-:*:*:*:*:*:*:*
qualcomm qca6564a_firmware — cpe:2.3:o:qualcomm:qca6564a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6564au_firmware — cpe:2.3:o:qualcomm:qca6564au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6574_firmware — cpe:2.3:o:qualcomm:qca6574_firmware:-:*:*:*:*:*:*:*
qualcomm qca6574a_firmware — cpe:2.3:o:qualcomm:qca6574a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6574au_firmware — cpe:2.3:o:qualcomm:qca6574au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6595_firmware — cpe:2.3:o:qualcomm:qca6595_firmware:-:*:*:*:*:*:*:*
qualcomm qca6595au_firmware — cpe:2.3:o:qualcomm:qca6595au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6696_firmware — cpe:2.3:o:qualcomm:qca6696_firmware:-:*:*:*:*:*:*:*
qualcomm qca8337_firmware — cpe:2.3:o:qualcomm:qca8337_firmware:-:*:*:*:*:*:*:*
qualcomm qca9367_firmware — cpe:2.3:o:qualcomm:qca9367_firmware:-:*:*:*:*:*:*:*
qualcomm qca9377_firmware — cpe:2.3:o:qualcomm:qca9377_firmware:-:*:*:*:*:*:*:*
qualcomm qca9379_firmware — cpe:2.3:o:qualcomm:qca9379_firmware:-:*:*:*:*:*:*:*
qualcomm qcm2290_firmware — cpe:2.3:o:qualcomm:qcm2290_firmware:-:*:*:*:*:*:*:*
qualcomm qcm4290_firmware — cpe:2.3:o:qualcomm:qcm4290_firmware:-:*:*:*:*:*:*:*
qualcomm qcm6125_firmware — cpe:2.3:o:qualcomm:qcm6125_firmware:-:*:*:*:*:*:*:*
qualcomm qcn9011_firmware — cpe:2.3:o:qualcomm:qcn9011_firmware:-:*:*:*:*:*:*:*
qualcomm qcn9012_firmware — cpe:2.3:o:qualcomm:qcn9012_firmware:-:*:*:*:*:*:*:*
qualcomm qcn9074_firmware — cpe:2.3:o:qualcomm:qcn9074_firmware:-:*:*:*:*:*:*:*
qualcomm qcs2290_firmware — cpe:2.3:o:qualcomm:qcs2290_firmware:-:*:*:*:*:*:*:*
qualcomm qcs410_firmware — cpe:2.3:o:qualcomm:qcs410_firmware:-:*:*:*:*:*:*:*
qualcomm qcs4290_firmware — cpe:2.3:o:qualcomm:qcs4290_firmware:-:*:*:*:*:*:*:*
qualcomm qcs610_firmware — cpe:2.3:o:qualcomm:qcs610_firmware:-:*:*:*:*:*:*:*
qualcomm qcs6125_firmware — cpe:2.3:o:qualcomm:qcs6125_firmware:-:*:*:*:*:*:*:*
qualcomm qcs8155_firmware — cpe:2.3:o:qualcomm:qcs8155_firmware:-:*:*:*:*:*:*:*
qualcomm qcs8250_firmware — cpe:2.3:o:qualcomm:qcs8250_firmware:-:*:*:*:*:*:*:*
qualcomm qrb5165m_firmware — cpe:2.3:o:qualcomm:qrb5165m_firmware:-:*:*:*:*:*:*:*
qualcomm qrb5165n_firmware — cpe:2.3:o:qualcomm:qrb5165n_firmware:-:*:*:*:*:*:*:*
qualcomm qsm8250_firmware — cpe:2.3:o:qualcomm:qsm8250_firmware:-:*:*:*:*:*:*:*
qualcomm 8905_firmware — cpe:2.3:o:qualcomm:8905_firmware:-:*:*:*:*:*:*:*
qualcomm qm215_firmware — cpe:2.3:o:qualcomm:qm215_firmware:-:*:*:*:*:*:*:*
qualcomm sda\/sdm845_firmware — cpe:2.3:o:qualcomm:sda\/sdm845_firmware:-:*:*:*:*:*:*:*
qualcomm qrb5165_firmware — cpe:2.3:o:qualcomm:qrb5165_firmware:-:*:*:*:*:*:*:*
qualcomm sa6145p_firmware — cpe:2.3:o:qualcomm:sa6145p_firmware:-:*:*:*:*:*:*:*
qualcomm sa6150p_firmware — cpe:2.3:o:qualcomm:sa6150p_firmware:-:*:*:*:*:*:*:*
qualcomm sa6155_firmware — cpe:2.3:o:qualcomm:sa6155_firmware:-:*:*:*:*:*:*:*
qualcomm sa6155p_firmware — cpe:2.3:o:qualcomm:sa6155p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8145p_firmware — cpe:2.3:o:qualcomm:sa8145p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8150p_firmware — cpe:2.3:o:qualcomm:sa8150p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8155_firmware — cpe:2.3:o:qualcomm:sa8155_firmware:-:*:*:*:*:*:*:*
qualcomm sa8155p_firmware — cpe:2.3:o:qualcomm:sa8155p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8195p_firmware — cpe:2.3:o:qualcomm:sa8195p_firmware:-:*:*:*:*:*:*:*
qualcomm sd_675_firmware — cpe:2.3:o:qualcomm:sd_675_firmware:-:*:*:*:*:*:*:*
qualcomm sd626_firmware — cpe:2.3:o:qualcomm:sd626_firmware:-:*:*:*:*:*:*:*
qualcomm sd660_firmware — cpe:2.3:o:qualcomm:sd660_firmware:-:*:*:*:*:*:*:*
qualcomm sd670_firmware — cpe:2.3:o:qualcomm:sd670_firmware:-:*:*:*:*:*:*:*
qualcomm sd675_firmware — cpe:2.3:o:qualcomm:sd675_firmware:-:*:*:*:*:*:*:*
qualcomm sd730_firmware — cpe:2.3:o:qualcomm:sd730_firmware:-:*:*:*:*:*:*:*
qualcomm sd835_firmware — cpe:2.3:o:qualcomm:sd835_firmware:-:*:*:*:*:*:*:*
qualcomm sd855_firmware — cpe:2.3:o:qualcomm:sd855_firmware:-:*:*:*:*:*:*:*
qualcomm sd865_5g_firmware — cpe:2.3:o:qualcomm:sd865_5g_firmware:-:*:*:*:*:*:*:*
qualcomm sdm429w_firmware — cpe:2.3:o:qualcomm:sdm429w_firmware:-:*:*:*:*:*:*:*
qualcomm sdx20m_firmware — cpe:2.3:o:qualcomm:sdx20m_firmware:-:*:*:*:*:*:*:*
qualcomm sdx55_firmware — cpe:2.3:o:qualcomm:sdx55_firmware:-:*:*:*:*:*:*:*
qualcomm sm4125_firmware — cpe:2.3:o:qualcomm:sm4125_firmware:-:*:*:*:*:*:*:*

References for CVE-2023-21666

cvelogic Threat Intelligence