redis-server use-after-free in unblock client flow may allow remote code execution
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.7epss 1.3%
from disclosure to weapon30 days
Published on NVDMay 5
1st PoC+30d
exploitation probability
1.3%top 33% of all CVEs
observed exploitation
nono source reports it
3 public exploit(s)
Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client flow does not handle an error return from `processCommandAndResetClient` when re-executing a blocked command. If a blocked client is evicted during this flow, an authenticated attacker can trigger a use-after-free that may lead to remote code execution. This has been patched in version 8.6.3.
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
redis · redispublic PoCs found — 3
githubgithub.com/jenniferreire26/CVE-2026-23479★ 0githubgithub.com/pduggusa/redis-cve-2026-23479-check★ 0githubgithub.com/v1c0mmrt/redis-cve-2026-23479-scanner★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://access.redhat.com/errata/RHSA-2026:14316https://access.redhat.com/errata/RHSA-2026:25216https://access.redhat.com/errata/RHSA-2026:25219https://access.redhat.com/errata/RHSA-2026:25925https://access.redhat.com/errata/RHSA-2026:26306https://access.redhat.com/errata/RHSA-2026:26540https://access.redhat.com/errata/RHSA-2026:7662https://access.redhat.com/security/cve/CVE-2026-23479https://bugzilla.redhat.com/show_bug.cgi?id=2466780https://github.com/redis/redis/releases/tag/8.6.3https://github.com/redis/redis/security/advisories/GHSA-93m2-935m-8rj3https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23479.json