What is CVE-2020-36402?

CVE-2020-36402 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-07-01.

How severe is CVE-2020-36402?

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

Buffer overflow in Linux Kernel

CVE-2020-36402

Solidity 0.7.5 has a stack-use-after-return issue in smtutil::CHCSmtLib2Interface::querySolver. NOTE: c39a5e2b7a3fabbf687f53a2823fc087be6c1a7e is cited in the OSV "fixed" field but does not have a code change.

Vulnerability class: Buffer Overflow

Published 2021-07-01 · last modified 2026-06-17.

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: 0.010 (60.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Linux Kernel
Soliditylang Solidity — versions 0.7.5

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/google/oss-fuzz-vulns/blob/main/vulns/solidity/OSV-2020-2131.yaml (Third Party Advisory)
bugs.chromium.org/p/oss-fuzz/issues/detail (Exploit, Patch, Third Party Advisory, Issue Tracking)
github.com/ethereum/solidity/commit/c39a5e2b7a3fabbf687f53a2823fc087be6c1a7e (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-36402?: CVE-2020-36402 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-07-01.
How severe is CVE-2020-36402?: High severity. CVSS v3 base score is 7.8 out of 10.