What is CVE-2023-43515?

CVE-2023-43515 is a medium-severity vulnerability in Qualcomm Fastconnect 6900, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.6/10. Published 2024-04-01.

How severe is CVE-2023-43515?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Is CVE-2023-43515 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Qualcomm Fastconnect 6900

CVE-2023-43515

Memory corruption in HLOS while running kernel address sanitizers (syzkaller) on tmecom with DEBUG_FS enabled.

Vulnerability class: Buffer Overflow

Published 2024-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L.

EPSS exploit prediction

EPSS: 0.001 (1.2th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 1.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

docs.qualcomm.com/product/publicresources/securitybulletin/april-2024-bulletin… (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-43515?: CVE-2023-43515 is a medium-severity vulnerability in Qualcomm Fastconnect 6900, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.6/10. Published 2024-04-01.
How severe is CVE-2023-43515?: Medium severity. CVSS v3 base score is 6.6 out of 10.
Is CVE-2023-43515 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.