CVE-2025-46819: Redis is an open source, in-memory database that persists on disk

Q: How do I fix CVE-2025-46819?

redis: upgrade to 6.2.20, 7.2.11, 7.4.6, 8.0.4, 8.2.2. Exact commands for each OS are on this page.

Q: Is CVE-2025-46819 being exploited?

CVE-2025-46819 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-46819 affect?

CVE-2025-46819 affects redis. Severity is medium (CVSS 6.3). Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted LUA script to read out-of-bound data or crash the server and subsequent denial of service. Th

Q: How urgent is CVE-2025-46819?

Priority 38/100. No elevated risk signals yet.

Routine

MEDIUM 6.3UPGRADE

CVE-2025-46819 is a medium-severity flaw (CVSS 6.3) affecting redis. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted LUA script to read out-of-bound data or crash the server and subsequent denial of service. The problem exists in all versions of Redis with Lua scripting. This issue is fixed in version 8.2.2. To workaround this issue without patching the redis-server executable is to prevent users from executing Lua s

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-190, CWE-125
Published	2025-10-03
Last modified	2026-10-19

Publisher (CNA): GitHub, Inc. · Vendor: redis

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-03 19:15 UTCPublished CVE record published
2026-10-19 17:10 UTCUpdated Record last modified

redis redis UPGRADE

Affected: < 6.2.20 · >= 7.0 and < 7.2.11 · >= 7.4.0 and < 7.4.6 · >= 8.0.0 and < 8.0.4 · >= 8.2.0 and < 8.2.2

Fixed in: 6.2.20, 7.2.11, 7.4.6, 8.0.4, 8.2.2

Safe to downgrade to: a release before 7.0

1. Check installed version

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

2. UPGRADE to 6.2.20 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade redis

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 7.0 (Debian / Ubuntu)

apt-cache madison redis sudo apt install redis=<VERSION_BEFORE_7.0> sudo apt-mark hold redis

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

dnf --showduplicates list redis sudo dnf downgrade redis-<VERSION_BEFORE_7.0> sudo dnf versionlock add redis

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: Redis < 8.2.1 Lua Long-String Delimiter - Out-of-Bounds Read

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-2025-46819?

redis: upgrade to 6.2.20, 7.2.11, 7.4.6, 8.0.4, 8.2.2. Exact commands for each OS are on this page.

Is CVE-2025-46819 being exploited?

CVE-2025-46819 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-2025-46819 affect?

CVE-2025-46819 affects redis. Severity is medium (CVSS 6.3). Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted LUA script to read out-of-bound data or crash the server and subsequent denial of service. Th

How urgent is CVE-2025-46819?

Priority 38/100. No elevated risk signals yet.

Software pages

Redis vulnerabilities

Related CVEs

CVE-2025-46817 HIGH 7.0 UPGRADE Redis is an open source, in-memory database that persists on disk
CVE-2025-46818 MEDIUM 6.0 UPGRADE Redis is an open source, in-memory database that persists on disk
CVE-2025-49844 CRITICAL 9.9 UPGRADE UPGRADE Redis is an open source, in-memory database that persists on disk
CVE-2025-62507 HIGH 8.8 UPGRADE Redis is an open source, in-memory database that persists on disk
CVE-2026-25243 HIGH 8.8 UPGRADE Redis is an in-memory data structure store

References

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