CVE-2020-10021 json
Out-of-bounds write in USB Mass Storage with unaligned sizes
published 2020-05-11 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-2486
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
Out-of-bounds Write in the USB Mass Storage memoryWrite handler with unaligned Sizes See NCC-ZEP-024, NCC-ZEP-025, NCC-ZEP-026 This issue affects: zephyrproject-rtos zephyr version 1.14.1 and later versions. version 2.1.0 and later versions.
Patch / fix
- zephyrproject zephyr 2.2.0
- github.com/zephyrproject-rtos/zephyr#23240 pull request
- github.com/zephyrproject-rtos/zephyr#23455 pull request
- github.com/zephyrproject-rtos/zephyr#23456 pull request
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- zephyrproject-rtos zephyr
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
github.com
/zephyrproject-rtos/zephyr/pull/23240
patch, third-party-advisory
-
github.com
/zephyrproject-rtos/zephyr/pull/23455
patch, third-party-advisory
-
github.com
/zephyrproject-rtos/zephyr/pull/23456
patch, third-party-advisory
-
zephyrprojectsec.atlassian.net
/browse/ZEPSEC-26
third-party-advisory
- docs.zephyrproject.org /latest/security/vulnerabilities.html#cve-2020-10021
Sources
- CVE List CVE-2020-10021
- NVD CVE-2020-10021
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.