CVE-2020-11656

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by...

9.8 CriticalFix available

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

8.72%Up 6.9 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.

Record: CVE-2020-11656
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-416
Updated: 2026-11-02

CVE List No score

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.

Record: CVE-2020-11656
Updated: 2026-11-02

EUVDEUVD-2020-3999 No score

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.

Record: EUVD-2020-3999
Updated: 2026-11-02

GitHub AdvisoriesGHSA-x2v5-p27f-53wp 9.8

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by...

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.

Record: GHSA-x2v5-p27f-53wp
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-416
Updated: 2026-11-02

OSVAZL-38947 9.8

CVE-2020-11656 affecting package ceph for versions less than 18.2.1-1

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.

Record: AZL-38947
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSV 9.8

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.

Record: CVE-2020-11656
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-11656 9.8

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.

Record: DEBIAN-CVE-2020-11656
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVBIT-sqlite-2020-11656 No score

In SQLite through 3.31.1, the ALTER TABLE implementation has a use-after-free, as demonstrated by an ORDER BY clause that belongs to a compound SELECT statement.

Record: BIT-sqlite-2020-11656
Updated: 2026-11-02

Affected products

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Affected packages

Affected packages
Package	Affected	Fixed
`ceph` Azure Linux:3	before 18.2.1-1	18.2.1-1
`sqlite` Bitnami	before 3.31.2	3.31.2
`sqlite3` Debian:12	before 3.32.0-1	3.32.0-1
`sqlite3` Debian:13	before 3.32.0-1	3.32.0-1
`sqlite3` Debian:14	before 3.32.0-1	3.32.0-1

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-11656 is a critical vulnerability (CVSS 9.8) in Sqlite, published April 9, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 8.72%, the 95th percentile. Fixed in ceph 18.2.1-1.

References

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