{"id":"CVE-2026-23479","state":"PUBLISHED","title":"redis-server use-after-free in unblock client flow may allow remote code execution","description":"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. 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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."}],"affected":[{"vendor":"redis","product":"redis","versions":[{"version":">= 7.2.0, < 8.6.3","status":"affected"}]}],"references":[{"url":"https://github.com/redis/redis/security/advisories/GHSA-93m2-935m-8rj3","name":"https://github.com/redis/redis/security/advisories/GHSA-93m2-935m-8rj3","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/redis/redis/releases/tag/8.6.3","name":"https://github.com/redis/redis/releases/tag/8.6.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","lang":"en","description":"CWE-416: Use After Free","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-05T16:41:47.303Z"},"source":{"advisory":"GHSA-93m2-935m-8rj3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-05T00:00:00+00:00","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3","id":"CVE-2026-23479"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-06T03:56:08.169Z"}},{"title":"redis: use-after-free in unblock client flow may allow remote code execution","descriptions":[{"lang":"en","value":"A flaw was found in Redis. The unblock client flow does not handle an error return from the `processCommandAndResetClient` when re-executing a blocked command. If a blocked client is evicted during this flow, an authenticated attacker can cause a use-after-free issue. This potentially leads to arbitrary code execution."}],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","packageName":"valkey","defaultStatus":"affected","versions":[{"version":"0:8.0.9-1.el10_2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","packageName":"valkey","defaultStatus":"affected","versions":[{"version":"0:8.0.9-1.el10_0","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 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Linux AppStream (v. 9)"},{"lang":"en","value":"RHSA-2026:25925: Red Hat Enterprise Linux AppStream (v. 9)"},{"lang":"en","value":"RHSA-2026:7662: Red Hat Hardened Images"},{"lang":"en","value":"RHSA-2026:14316: Red Hat Hardened Images"}],"timeline":[{"lang":"en","time":"2026-05-05T17:01:54.051Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-05-05T16:36:05.486Z","value":"Made public."}],"workarounds":[{"lang":"en","value":"Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}],"x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"}}]}}}