Buffer Access with Incorrect Length Value in zephyr

published 2021-10-05 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26890

cvss: 7.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits: 0; none known

Buffer Access with Incorrect Length Value in zephyr. Zephyr versions >= >=2.5.0 contain Buffer Access with Incorrect Length Value (CWE-805). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8q65-5gqf-fmw5

Patch / fix

fixed in 1 links 1

zephyrproject zephyr 2.6.0

github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-8q65-5g… advisory

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.0	CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	5.8	AV:A/AC:L/Au:N/C:P/I:P/A:P

Affected products

zephyrproject-rtos zephyr

Classification

Weakness

CWE-805 Buffer Access with Incorrect Length Value
CWE-1284 Improper Validation of Specified Quantity in Input

References

github.com /zephyrproject-rtos/zephyr/security/advisories/GHSA-8q65-5gqf-fmw5
patch, vendor-advisory

Sources

CVE List CVE-2021-3581
NVD CVE-2021-3581

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