CVE-2021-27504

HIGHNVD 7.47.4—

7.4

Texas Instruments devices running FREERTOS, malloc returns a valid pointer to a small buffer on extremely large values, which can trigger an integer overflow vulnerability in 'malloc' for FreeRTOS, resulting in code execution.

CVSS v3: 7.4
EG Score: 7.4(medium)
EPSS: 24.8%
KEV: Not listed

Published

November 21, 2023

Last Modified

November 21, 2024

References (4)

ics-cert@hqhttps://www.cisa.gov/news-events/ics-advisories/icsa-21-119-04
ics-cert@hqhttps://www.ti.com/tool/TI-RTOS-MCU
af854a3a-2127-422b-91ae-364da2661108https://www.cisa.gov/news-events/ics-advisories/icsa-21-119-04
af854a3a-2127-422b-91ae-364da2661108https://www.ti.com/tool/TI-RTOS-MCU

Weakness Classification(1)

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

CWE-190Integer Overflow or Wraparound

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2021-27504?

CVE-2021-27504 is a high vulnerability published on November 21, 2023. Texas Instruments devices running FREERTOS, malloc returns a valid pointer to a small buffer on extremely large values, which can trigger an integer overflow vulnerability in 'malloc' for FreeRTOS, resulting in code execution.

When was CVE-2021-27504 disclosed?

CVE-2021-27504 was first published in the National Vulnerability Database on November 21, 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-2021-27504 actively exploited?

CVE-2021-27504 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-27504?

CVE-2021-27504 has a CVSS v3 base score of 7.4 (NVD).

How do I remediate CVE-2021-27504?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-27504, 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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CVE-2021-27504

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-27504?

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Published

Last Modified

References (4)

Frequently asked(5)

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