CVE-2025-53888

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.7%, top 50% 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
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 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, has an ineffective size check implemented with assert() can lead to buffer overflow in versions up to and including 2025.04. Assertions are usually compiled out in production builds. If assertions are the only defense against untrusted inputs, the software may be exposed to attacks that utilize the lack of proper input checks. In the l2filter_add() function shown below, addr_len is checked using an assertion and is subsequently used as an argument in a memcpy() call. When assertions are disabled, there would be no size check for addr_len. As a consequence, if an attacker were to provide an addr_len value larger than CONFIG_L2FILTER_ADDR_MAXLEN, they can trigger a buffer overflow and write past the list[i].addr buffer. If the unchecked input is attacker-controlled, the impact of the buffer overflow can range from a denial of service to arbitrary code execution. Commit f6f7de4ccc107c018630e4c15500825caf02e1c2 contains a patch for the vulnerability.

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 PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

July 18, 2025

Last Modified

September 11, 2025

Advisory Details (3)

Auto-updated Jun 12, 2026
Patch available. Sources: github_commit, github.
github Patch Available

Ineffective size check leads to buffer overflow in link layer address filter /sys/net/link_layer/l2filter/l2filter.c · Advisory · RIOT-OS/RIOT · GitHub

https://github.com/RIOT-OS/RIOT/security/advisories/GHSA-7972-w7f9-3j9m
github_commit

commit f6f7de4ccc10 (RIOT-OS/RIOT)

Fix landed in RIOT-OS/RIOT commit f6f7de4ccc10 — awaiting tagged release

https://github.com/RIOT-OS/RIOT/commit/f6f7de4ccc107c018630e4c15500825caf02e1c2
generic

RIOT/sys/net/link_layer/l2filter/l2filter.c at 2025.04 · RIOT-OS/RIOT · GitHub

https://github.com/RIOT-OS/RIOT/blob/2025.04/sys/net/link_layer/l2filter/l2filter.c#L47

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 42× 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.

  1. 2026-07-26 14:54 UTCEPSS rescore
  2. 2026-07-25 14:17 UTCEPSS rescore
  3. 2026-07-24 14:17 UTCEPSS rescore
  4. 2026-07-24 00:41 UTCOSV refresh
  5. 2026-07-23 14:18 UTCEPSS rescore
  6. 2026-07-23 02:58 UTCEG score recompute
  7. 2026-07-22 14:08 UTCEPSS rescore
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  1. 2026-07-09 19:09 UTCEPSS rescore
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  3. 2026-07-07 13:45 UTCEPSS rescore
  4. 2026-07-06 18:51 UTCOSV refresh
  5. 2026-07-06 16:27 UTCEPSS rescore
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  18. 2026-06-28 04:55 UTCEPSS rescore
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  21. 2026-06-25 13:49 UTCEPSS rescore
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  30. 2026-06-19 19:25 UTCEPSS rescore
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  32. 2026-06-18 17:52 UTCEPSS rescore
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  34. 2026-06-18 07:13 UTCOSV refresh
  35. 2026-06-17 17:52 UTCEPSS rescore
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  44. 2026-06-10 22:18 UTCEPSS rescore
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  48. 2026-06-08 14:16 UTCEPSS rescore
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  50. 2026-06-07 15:24 UTCEPSS rescore
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  52. 2026-06-06 13:47 UTCEPSS rescore
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  54. 2026-06-05 22:46 UTCEPSS rescore
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  66. 2026-05-31 00:16 UTCEPSS rescore
  67. 2026-05-31 00:16 UTCEPSS rescore
  68. 2026-05-30 01:46 UTCEG score recompute
  69. 2026-05-29 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-53888?
CVE-2025-53888 is a critical vulnerability published on July 18, 2025. RIOT-OS, an operating system that supports Internet of Things devices, has an ineffective size check implemented with assert() can lead to buffer overflow in versions up to and including 2025.04. Assertions are usually compiled out in production builds. If assertions are the only defense against…
When was CVE-2025-53888 disclosed?
CVE-2025-53888 was first published in the National Vulnerability Database on July 18, 2025, with the most recent update on September 11, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-53888 actively exploited?
CVE-2025-53888 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 50.1% of all scored CVEs.
What is the CVSS score of CVE-2025-53888?
CVE-2025-53888 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-53888?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-53888, 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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