CVE-2025-62507: Redis is an open source, in-memory database that persists on disk

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HIGH 8.8UPGRADE

CVE-2025-62507 is a high-severity flaw (CVSS 8.8) 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. In versions 8.2.0 and above, a user can run the XACKDEL command with multiple ID's and trigger a stack buffer overflow, which may potentially lead to remote code execution. This issue is fixed in version 8.2.3. To workaround this issue without patching the redis-server executable is to prevent users from executing XACKDEL operation. This can be done using ACL to restrict XACKDEL c

Why this priority

High severity
EPSS top 6%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	7.5% (top 6%)
CISA exploited list	No
Weakness	CWE-20, CWE-121, CWE-787
Published	2025-11-04
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

2025-11-04 22:16 UTCPublished CVE record published
2026-10-19 13:10 UTCUpdated Record last modified

redis redis UPGRADE

Affected: >= 8.2.0 and < 8.2.3

Fixed in: 8.2.3

Safe to downgrade to: a release before 8.2.0

1. Check installed version

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

2. UPGRADE to 8.2.3 (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 8.2.0 (Debian / Ubuntu)

apt-cache madison redis sudo apt install redis=<VERSION_BEFORE_8.2.0> 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_8.2.0> 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.

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-2025-62507?

redis: upgrade to 8.2.3. Exact commands for each OS are on this page.

Is CVE-2025-62507 being exploited?

CVE-2025-62507 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-2025-62507 affect?

CVE-2025-62507 affects redis. Severity is high (CVSS 8.8). Redis is an open source, in-memory database that persists on disk. In versions 8.2.0 and above, a user can run the XACKDEL command with multiple ID's and trigger a stack buffer overflow, which may potentially lead to remote code execution.

How urgent is CVE-2025-62507?

Priority 54/100. High severity; EPSS top 6%: very likely to be exploited

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-2025-46819 MEDIUM 6.3 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-2026-25243 HIGH 8.8 UPGRADE Redis is an in-memory data structure store

References

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