What is CVE-2021-25900?

CVE-2021-25900 is a critical-severity vulnerability in Servo Smallvec, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-01-26.

How severe is CVE-2021-25900?

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

Is CVE-2021-25900 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Servo Smallvec

CVE-2021-25900

An issue was discovered in the smallvec crate before 0.6.14 and 1.x before 1.6.1 for Rust. There is a heap-based buffer overflow in SmallVec::insert_many.

Vulnerability class: Buffer Overflow

EPSS: 0.017 (74.3th 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

Servo Smallvec
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

Artisan-Lab/Rust-memory-safety-bugs

References

cve@mitre.org (Exploit, Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-25900?: CVE-2021-25900 is a critical-severity vulnerability in Servo Smallvec, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-01-26.
How severe is CVE-2021-25900?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-25900 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.