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CVE-2021-32675

32
FAUCET Score

CVE-2021-32675 is a high-severity denial-of-service vulnerability affecting Redis versions prior to 6.2.6, 6.0.16, and 5.0.14, as well as products from Debian, Fedora, NetApp, and Oracle. An unauthenticated attacker can exploit this by sending specially crafted Redis Standard Protocol (RESP) requests to cause excessive memory allocation, leading to a server crash. The attack is network-based and low complexity, with a CVSS score of 7.5. There is no evidence of active exploitation, public exploit code, or significant community discussion regarding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.0.0, < 5.0.14CPE matchmatch criteria
cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*
>= 6.0.0, < 6.0.16CPE matchmatch criteria
cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*
>= 6.2.0, < 6.2.6CPE matchmatch criteria
cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
15.78%
Probability of exploitation in next 30 days
EPSS Percentile
96.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1578 is in the 95th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (16)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 18985-16820Fixed in: 5.0.14-1
microsoftpatch availablevia msrc
Product: 18986-16823Fixed in: 6.2.6-1
microsoftpatch availablevia msrc
Product: cbl2 redis 6.2.6-1 on CBL Mariner 2.0Fixed in: 6.2.6-1
microsoftpatch availablevia msrc
Product: cm1 redis 5.0.14-1 on CBL Mariner 1.0Fixed in: 5.0.14-1
oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: redis:6-8040020211011082941.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.1 Extended Update SupportFixed in: redis:5-8010020211011065007.c27ad7f8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: redis:5-8020020211011071901.4cda2c84
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 10.0 (Newton)Fixed in: redis-0:3.2.8-5.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 13.0 - ELSFixed in: redis-0:3.2.8-5.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 13.0 (Queens) for RHEL 7.6 EUSFixed in: redis-0:3.2.8-5.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-redis5-redis-0:5.0.5-3.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-redis5-redis-0:5.0.5-3.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: redis:5-8040020211011074037.522a0ee4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2.3 for RHEL 8Fixed in: rhacm2/redisgraph-tls-rhel8:v2.3.3-3
View patch

Vendor Advisories (2)

microsoft2021-Oct/CVE-2021-32675Important

DoS vulnerability in Redis

Oct 12, 2021
redhatCVE-2021-32675Important

redis: Denial of service via Redis Standard Protocol (RESP) request

Oct 4, 2021

References

github.com / redis/redis/commit/5674b0057ff2903d43eaff802017eddf37c360f8
PatchThird Party Advisory
github.com / redis/redis/security/advisories/GHSA-f6pw-v9gw-v64p
Third Party Advisory
lists.apache.org / thread.html/ra603ff6e04549d7f290f61f9b11e2d2e4dba693b05ff053f4ec6bc47%40%3Cnotifications.geode.apache.org%3E
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/HTYQ5ZF37HNGTZWVNJD3VXP7I6MEEF42
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/VL5KXFN3ATM7IIM7Q4O4PWTSRGZ5744Z
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB
security.gentoo.org / glsa/202209-17
Third Party Advisory
security.netapp.com / advisory/ntap-20211104-0003
Third Party Advisory
debian.org / security/2021/dsa-5001
Third Party Advisory
oracle.com / security-alerts/cpuapr2022.html
PatchThird Party Advisory