CVE-2023-33973 json
RIOT-OS vulnerable to NULL pointer dereference during NHC encoding
published 2023-05-30 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-38099
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
Summary
RIOT-OS, an operating system for Internet of Things (IoT) devices, contains a network stack with the ability to process 6LoWPAN frames. In versions 2023.01 and prior, an attacker can send a crafted frame which is forwarded by the device. During encoding of the packet a NULL pointer dereference occurs. This crashes the device leading to denial of service. A patch is available at pull request 19678. There are no known workarounds.
Patch / fix
- github.com/RIOT-OS/RIOT@c9d7863 commit
- github.com/RIOT-OS/RIOT#19678 pull request
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 21 mo ago
Exploit prediction
0.96% chance of exploitation in the next 30 days, higher than 61% 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 |
| NVD | 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
- RIOT-OS RIOT
Classification
- Weakness
-
- CWE-476 NULL Pointer Dereference
References
-
github.com
/RIOT-OS/RIOT/pull/19678
issue-tracking, patch
-
github.com
/RIOT-OS/RIOT/commit/c9d7863e5664a169035038628029bb07e090c5ff
patch
-
github.com
/RIOT-OS/RIOT/security/advisories/GHSA-r2pv-3jqc-vh7w
vendor-advisory
-
github.com
/RIOT-OS/RIOT/blob/f41b4b67b6affca0a8b32edced7f51088696869a/sys/net/gnrc/network_layer/sixlowpan/iphc/gnrc_six
product
-
github.com
/RIOT-OS/RIOT/blob/f41b4b67b6affca0a8b32edced7f51088696869a/sys/net/gnrc/network_layer/sixlowpan/iphc/gnrc_six
product
-
github.com
/RIOT-OS/RIOT/blob/f41b4b67b6affca0a8b32edced7f51088696869a/sys/net/gnrc/network_layer/sixlowpan/iphc/gnrc_six
product
-
github.com
/RIOT-OS/RIOT/blob/f41b4b67b6affca0a8b32edced7f51088696869a/sys/net/gnrc/network_layer/sixlowpan/iphc/gnrc_six
product
-
github.com
/RIOT-OS/RIOT/blob/f41b4b67b6affca0a8b32edced7f51088696869a/sys/net/gnrc/network_layer/sixlowpan/iphc/gnrc_six
product
Sources
- CVE List CVE-2023-33973
- NVD CVE-2023-33973
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