CVE-2021-3470

mediumpriority · track · 21EPSS 0.011 · 67 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.14% (67th) EPSS

CVSS 5 · medium

Is it mine?

12 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lprimary · NVD / NIST USexploitability 3.9 · impact 1.4

v3.15.3mediumAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · FSTEC (BDU) RU

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-119USCWE-119US

affected products (12)

Products and version ranges known to be affected.

n/a Redis≤ redis 5.0.10, redis 6.0.9, redis 6.2.0enisa_euvdEU
Redis Labs Redis≤ 6.2.0 rc2fstec_bduRU
Redis Labs Redis≤ 6.2.0 rc3fstec_bduRU
Redis Labs Redis≤ 5.0.10fstec_bduRU
Redis Labs Redis≤ 6.2.0 rc1fstec_bduRU
Redis Labs Redis6.0.0 → 6.0.9fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Common Edition≤ 1.6 «Смоленск»fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 11fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
redislabs redis< 5.0.10nvdUScpe:2.3:a:redislabs:redis:*:*:*:*:*:*:*:*
redislabs redis6.0.0 → 6.0.9nvdUScpe:2.3:a:redislabs:redis:*:*:*:*:*:*:*:*
redislabs redis= 6.2.0nvdUScpe:2.3:a:redislabs:redis:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-03-31modified 2026-06-17

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Related entries.

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+16120 more

references (4)

External citations — patches, advisories, analysis.

https://bugzilla.redhat.com/show_bug.cgi?id=1943623 cnnvd
https://nvd.nist.gov/vuln/detail/CVE-2021-3470 cnnvd
https://bugzilla.redhat.com/show_bug.cgi?id=1943623 enisa_euvd
https://bugzilla.redhat.com/show_bug.cgi?id=1943623Issue TrackingPatchThird Party Advisorynvd

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