CVE-2021-31239: sqlite Out-of-bounds Read
CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2021-31239DEBIAN-CVE-2021-31239
Published 09-05-2023Last modified 14-10-2026
Vulnerability summary
CVE-2021-31239 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in sqlite. EPSS estimates a 2.45% chance of exploitation in the next 30 days, higher than 84.1% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
2.45%
0%100%
Low · +0.29 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 09-05-2023PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
Description
An issue found in SQLite SQLite3 v.3.35.4 that allows a remote attacker to cause a denial of service via the appendvfs.c function.
CVSS metrics
4 scores · 4 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.45%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
+0.29 pp
From 2.16% on 20-09-2026
20-09-202620-10-2026
EPSS score2.45%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundVulnerabilities
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Debian1 product
- sqlite3< 3.36.0-2
Sqlite1 product
- sqlite3.35.4
Ubuntu1 product
- sqlite3< 3.37.2-2ubuntu0.1
3 vendors · 3 products
References
12 links- lists.fedoraproject.org/archives/…Vendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- security.gentoo.org/glsa/202311-03Vendor Advisory
