CVE-2023-24823

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.0%, top 41% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

RIOT-OS, an operating system that supports Internet of Things devices, contains a network stack with the ability to process 6LoWPAN frames. Prior to version 2022.10, an attacker can send a crafted frame to the device resulting in a type confusion between IPv6 extension headers and a UDP header. This occurs while encoding a 6LoWPAN IPHC header. The type confusion manifests in an out of bounds write in the packet buffer. The overflow can be used to corrupt other packets and the allocator metadata. Corrupting a pointer will easily lead to denial of service. While carefully manipulating the allocator metadata gives an attacker the possibility to write data to arbitrary locations and thus execute arbitrary code. Version 2022.10 fixes this issue. As a workaround, apply the patches manually.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
58.7%
KEV
Not listed

Published

April 24, 2023

Last Modified

November 21, 2024

Advisory Details (3)

Auto-updated Jun 29, 2026
Patch available. Sources: github_pr, github.
github Patch Available

Packet Type Confusion during IPHC send · Advisory · RIOT-OS/RIOT · GitHub

https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-jwmv-47p2-hgq2
github_pr

gnrc_sixlowpan: Various hardening fixes [backport 2022.10]

Fix merged in RIOT-OS/RIOT PR #18820 on 2022-10-29 — awaiting tagged release

https://github.com/RIOT-OS/RIOT/pull/18820/commits/dafc397fdc3655aeb5c7b9963a43f1604c6a2062
github_pr

gnrc_sixlowpan: Various hardening fixes

Fix merged in RIOT-OS/RIOT PR #18817 on 2022-10-29 — awaiting tagged release

https://github.com/RIOT-OS/RIOT/pull/18817/commits/4a081f86616cb5c9dd0b5d7b286da03285d1652a

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 15× in last 7d / 51× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 110 total refreshes for this CVE.

  1. 2026-07-23 14:16 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2023-24823?
CVE-2023-24823 is a critical vulnerability published on April 24, 2023. RIOT-OS, an operating system that supports Internet of Things devices, contains a network stack with the ability to process 6LoWPAN frames. Prior to version 2022.10, an attacker can send a crafted frame to the device resulting in a type confusion between IPv6 extension headers and a UDP header.…
When was CVE-2023-24823 disclosed?
CVE-2023-24823 was first published in the National Vulnerability Database on April 24, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-24823 actively exploited?
CVE-2023-24823 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 58.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-24823?
CVE-2023-24823 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-24823?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-24823, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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