CVE-2021-3322 json
Unexpected Pointer Aliasing in IEEE 802154 Fragment Reassembly in Zephyr
published 2021-10-12 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26653
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 45%
- public exploits
- 0
- none known
Summary
Unexpected Pointer Aliasing in IEEE 802154 Fragment Reassembly in Zephyr. Zephyr versions >= >=2.4.0 contain NULL Pointer Dereference (CWE-476). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-p86r-gc4r-4mq3
Patch / fix
- zephyrproject zephyr 2.5.0
Exploit prediction
0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-p86r-gc4r-4mq3 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 3.3 | AV:A/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- zephyrproject-rtos zephyr
Classification
- Weakness
-
- CWE-476 NULL Pointer Dereference
References
-
github.com
/zephyrproject-rtos/zephyr/security/advisories/GHSA-p86r-gc4r-4mq3
exploit, patch, third-party-advisory
Sources
- CVE List CVE-2021-3322
- NVD CVE-2021-3322
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