CVE-2025-21455

CVE-2025-21455 is a high-severity vulnerability in Qualcomm Fastconnect 6800 Firmware with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-367.

Key facts

• Severity: High (CVSS 3.x base score 7.8)
• EPSS exploit prediction: 0% (1st percentile)
• Actively exploited: Not listed in CISA KEV
• EU (EUVD) id: EUVD-2025-23809
• Weakness: CWE-367
• Affected product: Qualcomm Fastconnect 6800 Firmware
• Published: 2025-08-06
• Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2025-21455?

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

How severe is CVE-2025-21455?

CVE-2025-21455 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-21455 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-21455?

CVE-2025-21455 primarily affects Qualcomm Fastconnect 6800 Firmware. In total, 29 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-21455?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-21455 have an EU (EUVD) identifier?

Yes. CVE-2025-21455 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23809.

When was CVE-2025-21455 published?

CVE-2025-21455 was published on 2025-08-06 and last updated on 2026-06-17.

References

• https://docs.qualcomm.com/product/publicresources/securitybulletin/august-2025-bulletin.html

Affected products (29)

• cpe:2.3:o:qualcomm:fastconnect_6800_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:fastconnect_6900_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:fastconnect_7800_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6391_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6426_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6436_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qsm8250_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd865_5g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sdx55_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:snapdragon_8_gen_1_mobile_platform_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:snapdragon_865_5g_mobile_platform_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:snapdragon_865\+_5g_mobile_platform_\(sm8250-ab\)_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:snapdragon_870_5g_mobile_platform_\(sm8250-ac\)_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:snapdragon_x55_5g_modem-rf_system_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:snapdragon_xr2_5g_platform_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sw5100_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sw5100p_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sxr2130_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sxr2230p_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sxr2250p_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcd9380_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcd9385_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn3980_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn3988_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wsa8810_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wsa8815_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wsa8830_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wsa8832_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wsa8835_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Qualcomm Fastconnect 6800 Firmware

• CVE-2025-27034 — Critical (CVSS 9.8): Memory corruption while selecting the PLMN from SOR failed list.
• CVE-2025-21483 — Critical (CVSS 9.8): Memory corruption when the UE receives an RTP packet from the network, during the reassembly of NALUs.
• CVE-2023-22388 — Critical (CVSS 9.8): Memory Corruption in Multi-mode Call Processor while processing bit mask API.
• CVE-2023-28581 — Critical (CVSS 9.8): Memory corruption in WLAN Firmware while parsing receieved GTK Keys in GTK KDE.
• CVE-2023-28562 — Critical (CVSS 9.8): Memory corruption while handling payloads from remote ESL.
• CVE-2023-43538 — Critical (CVSS 9.3): Memory corruption in TZ Secure OS while Tunnel Invoke Manager initialization.

All CVEs affecting Qualcomm Fastconnect 6800 Firmware →

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