What is CVE-2021-36081?

CVE-2021-36081 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2021-07-01.

How severe is CVE-2021-36081?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Linux Kernel

CVE-2021-36081

Tesseract OCR 5.0.0-alpha-20201231 has a one_ell_conflict use-after-free during a strpbrk call.

Vulnerability class: Use-After-Free

Published 2021-07-01 · last modified 2026-09-14.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.1th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: +0.000

Affected products

Linux Kernel
Tesseract-Ocr Tesseract Ocr — versions 5.0.0
Tesseract Ocr Project — versions 5.0.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

github.com/google/oss-fuzz-vulns/blob/main/vulns/tesseract-ocr/OSV-2021-211.yaml (Third Party Advisory)
bugs.chromium.org/p/oss-fuzz/issues/detail (Exploit, Patch, Third Party Advisory, Issue Tracking)
github.com/tesseract-ocr/tesseract/commit/e6f15621c2ab2ecbfabf656942d8ef66f03b2… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-36081?: CVE-2021-36081 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2021-07-01.
How severe is CVE-2021-36081?: High severity. CVSS v3 base score is 7.8 out of 10.