CVE-2020-17441
9.1
CRITICAL · CVSS 3.1 · EPSS 7% (pctl 94)
In your normal cycle
Critical by CVSS (9.1), but no sign of active exploitation.
Description
An issue was discovered in picoTCP 1.7.0. The code for processing the IPv6 headers does not validate whether the IPv6 payload length field is equal to the actual size of the payload, which leads to an Out-of-Bounds read during the ICMPv6 checksum calculation, resulting in either Denial-of-Service or Information Disclosure. This affects pico_ipv6_extension_headers and pico_checksum_adder (in pico_ipv6.c and pico_frame.c).
Scoring
| CVSS | 9.1 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| EPSS | 7% — more likely to be exploited than 94% of all CVEs |
| Weakness | CWE-125 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2020-12-11 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| altran | picotcp |
| microchip | mplab harmony |
References
→ the Explorer · watch your stack · NVD