Micrium OS Network uC-HTTP server header parsing invalid pointer dereference vulnerability

published 2024-04-16 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-56112

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits: 0; none known

A bug in Micrium OS Network HTTP Server permits an invalid pointer dereference during header processing - potentially allowing a device crash and Denial of Service.

Patch / fix

fixed in 1

silabs gecko_software_development_kit 4.4.2

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-07-26)

Exploit prediction

0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

silabs gecko_software_development_kit

Classification

Weakness

CWE-476 NULL Pointer Dereference
CWE-125 Out-of-bounds Read

References

Sources

CVE List CVE-2023-51391
NVD CVE-2023-51391

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary