Redis contains a use-after-free vulnerability in the tlsProcessPendingData() function, which handles the TLS pending-data list if Redis is configured with TLS support. A remote, unauthenticated attacker may be able to execute arbitrary commands with the privileges of the Redis server.
Weakness
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | RedHat | redis:6-8100020260821173603.489197e6 | * |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | RedHat | redis:6-8040020260916133739.522a0ee4 | * |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | RedHat | redis:6-8040020260916133739.522a0ee4 | * |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | RedHat | redis:6-8060020260916133704.ad008a3a | * |
| Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | RedHat | redis:6-8060020260916133704.ad008a3a | * |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service | RedHat | redis:6-8080020260916133522.63b34585 | * |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | RedHat | redis:6-8080020260916133522.63b34585 | * |
| Red Hat Enterprise Linux 9 | RedHat | redis-0:6.2.24-1.el9_8 | * |
| Red Hat Enterprise Linux 9 | RedHat | redis:7-9080020260821173335.9 | * |
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | RedHat | redis-0:6.2.7-1.el9_2.7 | * |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | RedHat | redis:7-9040020260917140622.9 | * |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | RedHat | redis-0:6.2.7-1.el9_4.7 | * |
| Red Hat Enterprise Linux 9.6 Extended Update Support | RedHat | redis-0:6.2.24-1.el9_6 | * |
| Red Hat Enterprise Linux 9.6 Extended Update Support | RedHat | redis:7-9060020260917140656.9 | * |
| Redis | Ubuntu | esm-apps/jammy | * |
| Redis | Ubuntu | esm-apps/noble | * |
| Redis | Ubuntu | esm-apps/resolute | * |
| Redis | Ubuntu | jammy | * |
| Redis | Ubuntu | noble | * |
| Redis | Ubuntu | resolute | * |
| Redis | Ubuntu | upstream | * |
Potential Mitigations
References
- https://github.com/redis/redis/commit/6d088c335d5c3ec49a6c28486140b498e70b7834
- https://github.com/redis/redis/releases/tag/6.2.24
- https://github.com/redis/redis/releases/tag/7.2.16
- https://github.com/redis/redis/releases/tag/7.4.11
- https://github.com/redis/redis/releases/tag/8.10.1
- https://github.com/redis/redis/releases/tag/8.2.9
- https://github.com/redis/redis/releases/tag/8.4.6
- https://github.com/redis/redis/releases/tag/8.6.6
- https://github.com/redis/redis/releases/tag/8.8.2
- https://github.com/v12-security/pocs/tree/main/redis/server_ssl
- https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-239-01.json
- https://raw.githubusercontent.com/redis/redis/6.2/00-RELEASENOTES
- https://raw.githubusercontent.com/redis/redis/7.2/00-RELEASENOTES
- https://raw.githubusercontent.com/redis/redis/7.4/00-RELEASENOTES
- https://raw.githubusercontent.com/redis/redis/8.10/00-RELEASENOTES
- https://raw.githubusercontent.com/redis/redis/8.2/00-RELEASENOTES
- https://raw.githubusercontent.com/redis/redis/8.4/00-RELEASENOTES
- https://raw.githubusercontent.com/redis/redis/8.6/00-RELEASENOTES
- https://raw.githubusercontent.com/redis/redis/8.8/00-RELEASENOTES
- https://redis.io/docs/latest/operate/rs/release-notes/rs-7-22-releases/rs-7-22-2-179/
- https://redis.io/docs/latest/operate/rs/release-notes/rs-7-8-releases/rs-7-8-6-303/
- https://redis.io/docs/latest/operate/rs/release-notes/rs-8-0-releases/rs-8-0-20-96/
- https://redis.io/docs/latest/operate/rs/release-notes/rs-8-2-releases/rs-8-2-0-46/
- https://www.cve.org/CVERecord?id=CVE-2026-81934