CVE-2021-35134

CVE-2021-35134 is a high-severity vulnerability in Qualcomm Qca6391 Firmware with a CVSS 3.x base score of 8.4. 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-131.

Key facts

• Severity: High (CVSS 3.x base score 8.4)
• EPSS exploit prediction: 0% (2nd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-131
• Affected product: Qualcomm Qca6391 Firmware
• Published: 2022-09-02
• Last modified: 2026-06-17

Description

Due to insufficient validation of ELF headers, an Incorrect Calculation of Buffer Size can occur in Boot leading to memory corruption in Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile

Frequently asked questions

What is CVE-2021-35134?

Due to insufficient validation of ELF headers, an Incorrect Calculation of Buffer Size can occur in Boot leading to memory corruption in Snapdragon Connectivity, Snapdragon Industrial IOT, Snapdragon Mobile

How severe is CVE-2021-35134?

CVE-2021-35134 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-35134 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35134?

CVE-2021-35134 primarily affects Qualcomm Qca6391 Firmware. In total, 30 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-35134?

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.

When was CVE-2021-35134 published?

CVE-2021-35134 was published on 2022-09-02 and last updated on 2026-06-17.

References

• https://www.qualcomm.com/company/product-security/bulletins/august-2022-bulletin

Affected products (30)

• cpe:2.3:o:qualcomm:qca6391_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qcm6490_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qcs6490_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qsm8350_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd_8_gen1_5g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd778g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd780g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd888_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sd888_5g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sm7315_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sm7325p_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sm7450_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sm8475_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:sm8475p_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcd9341_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcd9370_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcd9375_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcd9380_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcd9385_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6740_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6750_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6850_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6851_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6855_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6856_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn7850_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn7851_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 Qca6391 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-2023-43552 — Critical (CVSS 9.8): Memory corruption while processing MBSSID beacon containing several subelement IE.
• CVE-2023-33083 — Critical (CVSS 9.8): Memory corruption in WLAN Host while processing RRM beacon on the AP.
• CVE-2023-33082 — Critical (CVSS 9.8): Memory corruption while sending an Assoc Request having BTM Query or BTM Response containing MBO IE.
• CVE-2023-33045 — Critical (CVSS 9.8): Memory corruption in WLAN Firmware while parsing a NAN management frame carrying a S3 attribute.

All CVEs affecting Qualcomm Qca6391 Firmware →

Other CWE-131 (Incorrect Calculation of Buffer Size) vulnerabilities

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• CVE-2026-41676 — Critical (CVSS 9.8): rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.27 to before 0.10.78,…
• CVE-2026-1949 — Critical (CVSS 9.8): Delta Electronics AS320T has incorrect calculation of the buffer size on the stack in the GET/PUT request handler of…
• CVE-2026-20911 — Critical (CVSS 9.8): A heap-based buffer overflow vulnerability exists in the HuffTable::initval functionality of LibRaw Commit 0b56545 and…
• CVE-2025-1861 — Critical (CVSS 9.8): In PHP from 8.1.* before 8.1.32, from 8.2.* before 8.2.28, from 8.3.* before 8.3.19, from 8.4.* before 8.4.5, when…
• CVE-2023-5941 — Critical (CVSS 9.8): In versions of FreeBSD 12.4-RELEASE prior to 12.4-RELEASE-p7 and FreeBSD 13.2-RELEASE prior to 13.2-RELEASE-p5 the…

Browse all CWE-131 (Incorrect Calculation of Buffer Size) vulnerabilities →