CVE-2025-3277: An integer overflow can be triggered in SQLite’s `concat_ws()` function

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2025-3277 is a critical-severity flaw (CVSS 9.8) affecting sqlite. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An integer overflow can be triggered in SQLite’s `concat_ws()` function. The resulting, truncated integer is then used to allocate a buffer. When SQLite then writes the resulting string to the buffer, it uses the original, untruncated size and thus a wild Heap Buffer overflow of size ~4GB can be triggered. This can result in arbitrary code execution.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 31%)
CISA exploited list	No
Weakness	CWE-122, CWE-190
Published	2025-04-14
Last modified	2026-10-15

Publisher (CNA): Google Inc. · Vendor: sqlite

Last updated 2026-10-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-04-14 17:15 UTCPublished CVE record published
2026-10-15 02:18 UTCUpdated Record last modified

sqlite sqlite UPGRADE

Affected: >= 3.44.0 and < 3.49.1

Fixed in: 3.49.1

Safe to downgrade to: a release before 3.44.0

1. Check installed version

apt-cache policy sqlite || rpm -q sqlite || sqlite --version

2. UPGRADE to 3.49.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sqlite

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sqlite

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.44.0 (Debian / Ubuntu)

apt-cache madison sqlite sudo apt install sqlite=<VERSION_BEFORE_3.44.0> sudo apt-mark hold sqlite

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list sqlite sudo dnf downgrade sqlite-<VERSION_BEFORE_3.44.0> sudo dnf versionlock add sqlite

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-3277?

sqlite: upgrade to 3.49.1. Exact commands for each OS are on this page.

Is CVE-2025-3277 being exploited?

CVE-2025-3277 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-3277 affect?

CVE-2025-3277 affects sqlite. Severity is critical (CVSS 9.8). An integer overflow can be triggered in SQLite’s `concat_ws()` function. The resulting, truncated integer is then used to allocate a buffer. When SQLite then writes the resulting string to the buffer, it uses the original, untruncated size

How urgent is CVE-2025-3277?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

SQLite vulnerabilities

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References

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