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Fencer Vulns
high 7.5

CVE-2021-29478 json

Vulnerability in the COPY command for large intsets

published 2021-05-03 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-16085 , GHSA-qh52-crrg-44g3

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.6%
EPSS 3.6% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker. An integer overflow bug in Redis 6.2 before 6.2.3 could be exploited to corrupt the heap and potentially result with remote code execution. Redis 6.0 and earlier are not directly affected by this issue. The problem is fixed in version 6.2.3. An additional workaround to mitigate the problem without patching the `redis-server` executable is to prevent users from modifying the `set-max-intset-entries` configuration parameter. This can be done using ACL to restrict unprivileged users from using the `CONFIG SET` command.

Patch / fix

  • redislabs redis 6.2.3
  • redis Debian 14, Debian 13, Debian 12 5:6.0.13-1

debian advisories DEBIAN-CVE-2021-29478

  • redis SLE Module for Server Applications 15 SP3, SLE Module for Server Applications 15 SP2 6.0.13-1.10.1

suse advisories SUSE-SU-2021:1652-1

  • redis openSUSE Tumbleweed 6.2.5-1.2
  • redis openSUSE Leap 15.2 6.0.13-lp152.2.3.1

opensuse advisories openSUSE-SU-2024:11299-1openSUSE-SU-2021:0682-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-29478 updated cvss 7.5

redis: Integer overflow via COPY command for large intsets

  • Red Hat Advanced Cluster Management for Kubernetes 2 redisgraph-tls-rhel8
    affected: workaround, no fix available
  • Red Hat OpenStack Platform 10 (Newton) redis
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 13 (Queens) redis
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 1.2 redis Red Hat Ansible Tower 3 redis Red Hat Enterprise Linux 8 redis Red Hat Enterprise Linux 9 redis
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.61% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.0 AV:N/AC:M/Au:S/C:P/I:P/A:P

Affected products

  • redis redis

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of redis/redis published their own advisory on GitHub. Reviewed sources take precedence over it.