Description
Redis is an open source, in-memory database that persists on disk. In versions starting at 2.6 and prior to 7.4.3, An unauthenticated client can cause unlimited growth of output buffers, until the server runs out of memory or is killed. By default, the Redis configuration does not limit the output buffer of normal clients (see client-output-buffer-limit). Therefore, the output buffer can grow unlimitedly over time. As a result, the service is exhausted and the memory is unavailable. When password authentication is enabled on the Redis server, but no password is provided, the client can still cause the output buffer to grow from "NOAUTH" responses until the system will run out of memory. This issue has been patched in version 7.4.3. An additional workaround to mitigate this problem without patching the redis-server executable is to block access to prevent unauthenticated users from connecting to Redis. This can be done in different ways. Either using network access control tools like firewalls, iptables, security groups, etc, or enabling TLS and requiring users to authenticate using client side certificates.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| redis | redis | >= 2.6, < 7.4.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | redis | 5:7.0.15-3.1 | — |
| Debian 14 | valkey | 8.1.1+dfsg1-1 | — |
| Debian 13 | redis | 5:7.0.15-3.1 | — |
| Debian 13 | valkey | 8.1.1+dfsg1-1 | — |
| Debian 12 | redis | 5:7.0.15-1~deb12u4 | — |
| Debian 11 | redis | 5:6.0.16-1+deb11u6 | DLA-4162-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | redict | No fix yet | — |
| Ubuntu 25.10 | redict | No fix yet | — |
| Ubuntu 24.04 LTS | redis | No fix yet | — |
| Ubuntu 24.04 LTS | valkey | 7.2.11+dfsg1-0ubuntu0.2 | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | redis | No fix yet | — |
| Ubuntu Pro 20.04 LTS | redis | No fix yet | — |
| Ubuntu Pro 18.04 LTS | redis | No fix yet | — |
| Ubuntu Pro 16.04 LTS | redis | No fix yet | — |
| Ubuntu Pro 14.04 LTS | redis | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | valkey +1 | 8.0.3-1.el10_0 | RHSA-2025:7509 |
| RHEL 9 | redis +2 | 6.2.18-1.el9_6 | RHSA-2025:7438, RHSA-2025:7429 |
| RHEL 8 | redis +2 | 6.2.18-1.module+el8.10.0+23050+05ea4e95 | RHSA-2025:7686 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | redis +2 | 6.2.7-1.el9_4.2 | RHSA-2025:7538, RHSA-2025:4788 |
| RHEL 9.2 EUS | redis +2 | 6.2.7-1.el9_2.2 | RHSA-2025:4789 |
| RHEL 9.0 E4S | redis +2 | 6.2.6-1.el9_0.2 | RHSA-2025:4577 |
| RHEL 8.8 EUS | redis +2 | 6.2.7-1.module+el8.8.0+23086+95b1dcd4.3 | RHSA-2025:4607 |
| RHEL 8.6 TUS | redis +2 | 6.0.9-5.module+el8.6.0+23072+c1b08039.2 | RHSA-2025:4561 |
| RHEL 8.6 E4S | redis +2 | 6.0.9-5.module+el8.6.0+23072+c1b08039.2 | RHSA-2025:4561 |
| RHEL 8.6 AUS | redis +2 | 6.0.9-5.module+el8.6.0+23072+c1b08039.2 | RHSA-2025:4561 |
| RHEL 8.4 TUS | redis +2 | 6.0.9-5.module+el8.4.0+23067+0d16e377.2 | RHSA-2025:4441 |
| RHEL 8.4 E4S | redis +2 | 6.0.9-5.module+el8.4.0+23067+0d16e377.2 | RHSA-2025:4441 |
| RHEL 8.4 AUS | redis +2 | 6.0.9-5.module+el8.4.0+23067+0d16e377.2 | RHSA-2025:4441 |
| Red Hat Discovery 1 | discovery-cli | 1.14.0-1.el8 | RHSA-2025:7630 |
| Red Hat Discovery 1 | discovery-installer | 1.14.1-1.el8 | RHSA-2025:7630 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | valkey +1 | 8.0.3-1.el10_0 | ALSA-2025:7509 |
| AlmaLinux 9 | redis +2 | 6.2.18-1.el9_6 | ALSA-2025:7438, ALSA-2025:7429 |
| AlmaLinux 8 | redis +2 | 6.2.18-1.module_el8.10.0+3994+c2cc5395 | ALSA-2025:7686 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | valkey | 8.0.3-1.el10_0 | RLSA-2025:7509 |
| Rocky Linux 9 | redis | 6.2.18-1.el9_6 | RLSA-2025:7438, RLSA-2025:7429 |
| Rocky Linux 8 | redis | 6.2.18-1.module+el8.10.0+1980+8f0924a4 | RLSA-2025:7686 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | valkey | 8.0.2-150700.3.5.1 | SUSE-SU-2025:01942-1 |
| SLES 15 SP6 | redis | 7.2.4-150600.3.9.1 | SUSE-SU-2025:1433-1 |
| SLES 15 SP6 | redis7 | 7.0.8-150600.8.9.1 | SUSE-SU-2025:1432-1 |
| SLES 15 SP6 | valkey | 8.0.2-150600.13.6.1 | SUSE-SU-2025:1566-1 |
| SLES 15 SP5 | redis | 6.2.6-150400.3.34.1 | SUSE-SU-2025:1420-1 |
| SLES 15 SP5 | redis7 | 7.0.8-150500.3.18.1 | SUSE-SU-2025:1419-1 |
| SLES 15 SP4 | redis | 6.2.6-150400.3.34.1 | SUSE-SU-2025:1420-1 |
| SLES 15 SP3 | redis | 6.0.14-150200.6.35.1 | SUSE-SU-2025:02010-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | redis | 6.2.6-150400.3.34.1 | SUSE-SU-2025:1420-1 |
| SLES for SAP 15 SP5 | redis7 | 7.0.8-150500.3.18.1 | SUSE-SU-2025:1419-1 |
| SLES for SAP 15 SP4 | redis | 6.2.6-150400.3.34.1 | SUSE-SU-2025:1420-1 |
| SLES for SAP 15 SP3 | redis | 6.0.14-150200.6.35.1 | SUSE-SU-2025:02010-1 |
| SLE HPC 15 SP5 | redis | 6.2.6-150400.3.34.1 | SUSE-SU-2025:1420-1 |
| SLE HPC 15 SP5 | redis7 | 7.0.8-150500.3.18.1 | SUSE-SU-2025:1419-1 |
| SLE HPC 15 SP4 | redis | 6.2.6-150400.3.34.1 | SUSE-SU-2025:1420-1 |
| SLE HPC 15 SP3 | redis | 6.0.14-150200.6.35.1 | SUSE-SU-2025:02010-1 |
| SUSE Manager Server 4.3 | redis | 6.2.6-150400.3.34.1 | SUSE-SU-2025:1420-1 |
| SUSE Manager Proxy 4.3 | redis | 6.2.6-150400.3.34.1 | SUSE-SU-2025:1420-1 |
| SUSE Enterprise Storage 7.1 | redis | 6.0.14-150200.6.35.1 | SUSE-SU-2025:02010-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | redis | 8.0.2-1.1 | openSUSE-SU-2025:15293-1 |
| openSUSE Tumbleweed | valkey | 8.0.3-1.1 | openSUSE-SU-2025:15035-1 |
| openSUSE Leap 15.6 | redis | 7.2.4-150600.3.9.1 | SUSE-SU-2025:1433-1 |
| openSUSE Leap 15.6 | redis7 | 7.0.8-150600.8.9.1 | SUSE-SU-2025:1432-1 |
| openSUSE Leap 15.6 | valkey | 8.0.2-150600.13.6.1 | SUSE-SU-2025:1566-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | redict | 7.3.3-r0 | — |
| Alpine v3.24 | redis | 8.0.0-r0 | — |
| Alpine v3.24 | valkey | 7.2.9-r0 | — |
| Alpine v3.23 | redict | 7.3.3-r0 | — |
| Alpine v3.23 | redis | 8.0.0-r0 | — |
| Alpine v3.23 | valkey | 7.2.9-r0 | — |
| Alpine v3.22 | redict | 7.3.3-r0 | — |
| Alpine v3.22 | redis | 8.0.0-r0 | — |
| Alpine v3.22 | valkey | 7.2.9-r0 | — |
| Alpine v3.21 | redict | 7.3.3-r0 | — |
| Alpine v3.21 | redis | 7.2.8-r0 | — |
| Alpine v3.21 | valkey | 7.2.9-r0 | — |
| Alpine v3.20 | redict | 7.3.3-r0 | — |
| Alpine v3.20 | redis | 7.2.8-r0 | — |
| Alpine v3.20 | valkey | 7.2.9-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | redis | 7.2.8-r0 | — |
| Alpine v3.18 | redis | 7.0.15-r3 | — |
| Alpine v3.15 | redis | 6.2.18-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | redis6 +2 | 6.2.14-2.amzn2023.0.4 | ALAS2023-2025-950 |
| Amazon Linux 2023 | valkey +1 | 8.0.2-3.amzn2023.0.1 | ALAS2023-2025-949 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | valkey | 8.0.3-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | valkey +1 | 8.0.3-1.el10_0 | ELSA-2025-7509 |
| Oracle Linux 9 | redis +2 | 6.2.18-1.el9_6 | ELSA-2025-7438, ELSA-2025-7429 |
| Oracle Linux 8 | redis +2 | 6.2.18-1.0.1.module+el8.10.0+90576+0f5e8f7a | ELSA-2025-7686 |
Advisories 37
- ALSA-2025:7509 Important: valkey security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:7429 Important: redis:7 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:7438 Important: redis security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:7686 Important: redis:6 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2025:7686 Red Hat Security Advisory: redis:6 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:7630 Red Hat Security Advisory: updated discovery-cli RPMs Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:7538 Red Hat Security Advisory: redis:7 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:7509 Red Hat Security Advisory: valkey security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:7438 Red Hat Security Advisory: redis security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:7429 Red Hat Security Advisory: redis:7 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:4788 Red Hat Security Advisory: redis security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:4789 Red Hat Security Advisory: redis security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:4607 Red Hat Security Advisory: redis:6 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:4577 Red Hat Security Advisory: redis security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:4561 Red Hat Security Advisory: redis:6 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2025:4441 Red Hat Security Advisory: redis:6 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- openSUSE-SU-2025:15293-1 redis-8.0.2-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:1433-1 Security update for redis SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:01942-1 Security update for valkey SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:1432-1 Security update for redis SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4162-1 redis - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:1420-1 Security update for redis SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:02010-1 Security update for redis SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1419-1 Security update for redis SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1566-1 Security update for valkey SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:15035-1 valkey-8.0.3-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-0877 Redis: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Nov 27, 2025
- RLSA-2025:7509 Important: valkey security update Rocky Linux Security Advisories · Oct 8, 2025
- RLSA-2025:7438 Important: redis security update Rocky Linux Security Advisories · Oct 7, 2025
- RLSA-2025:7429 Important: redis:7 security update Rocky Linux Security Advisories · Oct 7, 2025
- RLSA-2025:7686 Important: redis:6 security update Rocky Linux Security Advisories · Jul 29, 2025
- ELSA-2025-7509 Important: valkey security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jun 26, 2025
- ELSA-2025-7438 Important: redis security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 22, 2025
- ELSA-2025-7429 Important: redis:7 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 21, 2025
- ELSA-2025-7686 Important: redis:6 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 16, 2025
- ALAS2023-2025-949 Important: valkey security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 29, 2025
- ALAS2023-2025-950 Important: redis6 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 29, 2025