What is CVE-2021-24037?

CVE-2021-24037 is a critical-severity vulnerability in Facebook Hermes, classified under Use After Free. CVSS score: 9.8/10. Published 2021-06-15.

How severe is CVE-2021-24037?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Use After Free in Facebook Hermes

CVE-2021-24037

A use after free in hermes, while emitting certain error messages, prior to commit d86e185e485b6330216dee8e854455c694e3a36e allows attackers to potentially execute arbitrary code via crafted JavaScript. Note that this is only exploitable i…

Vulnerability class: Use-After-Free

EPSS: 0.018 (76.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Facebook Hermes — versions commit prior to d86e185e485b6330216dee8e854455c694e3a36e

Weakness classification (CWE)

CWE-416 — Use After Free

References

cve-assign@fb.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
cve-assign@fb.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-24037?: CVE-2021-24037 is a critical-severity vulnerability in Facebook Hermes, classified under Use After Free. CVSS score: 9.8/10. Published 2021-06-15.
How severe is CVE-2021-24037?: Critical severity. CVSS v3 base score is 9.8 out of 10.