{"id":"CVE-2026-82631","state":"PUBLISHED","title":"valkey-io valkey Blocked-on-keys blocked.c handleClientsBlockedOnKey use after free","description":"A security flaw has been discovered in valkey-io valkey 9.1.0. The affected element is the function handleClientsBlockedOnKey of the file src/blocked.c of the component Blocked-on-keys Subsystem. The manipulation results in use after free. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is described as difficult. The exploit has been released to the public and may be used for attacks. The patch is identified as b2fb0e13f5b4c8c2fb63dcfc2c37a067a0d6d20b. Applying a patch is advised to resolve this issue.","publishedAt":"2026-08-31T07:45:13.359Z","updatedAt":"2026-08-31T11:33:30.966Z","severity":{"score":2.1,"label":"Low","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","source":"VulDB"},"assigner":"VulDB","products":["valkey-io valkey"],"affected":[{"vendor":"valkey-io","product":"valkey","versions":[{"version":"9.1.0","status":"affected"}],"cpes":["cpe:2.3:a:valkey-io:valkey:*:*:*:*:*:*:*:*"],"modules":["Blocked-on-keys Subsystem"]}],"references":["https://vuldb.com/vuln/397129","https://vuldb.com/vuln/397129/cti","https://vuldb.com/cve/CVE-2026-82631","https://vuldb.com/submit/893793","https://github.com/valkey-io/valkey/issues/4198","https://github.com/valkey-io/valkey/pull/4212","https://github.com/user-attachments/files/30111628/PoC.zip","https://github.com/valkey-io/valkey/commit/b2fb0e13f5b4c8c2fb63dcfc2c37a067a0d6d20b","https://github.com/valkey-io/valkey/"],"weaknesses":["CWE-416","CWE-119"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/82xxx/CVE-2026-82631.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-82631","state":"PUBLISHED","datePublished":"2026-08-31T07:45:13.359Z","dateUpdated":"2026-08-31T11:33:30.966Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-08-30T10:10:33.072Z"},"containers":{"cna":{"title":"valkey-io valkey Blocked-on-keys blocked.c handleClientsBlockedOnKey use after free","descriptions":[{"lang":"en","value":"A security flaw has been discovered in valkey-io valkey 9.1.0. The affected element is the function handleClientsBlockedOnKey of the file src/blocked.c of the component Blocked-on-keys Subsystem. The manipulation results in use after free. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is described as difficult. The exploit has been released to the public and may be used for attacks. The patch is identified as b2fb0e13f5b4c8c2fb63dcfc2c37a067a0d6d20b. Applying a patch is advised to resolve this issue."}],"affected":[{"vendor":"valkey-io","product":"valkey","versions":[{"version":"9.1.0","status":"affected"}],"cpes":["cpe:2.3:a:valkey-io:valkey:*:*:*:*:*:*:*:*"],"modules":["Blocked-on-keys Subsystem"]}],"references":[{"url":"https://vuldb.com/vuln/397129","name":"VDB-397129 | valkey-io valkey Blocked-on-keys blocked.c handleClientsBlockedOnKey use after free","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/397129/cti","name":"VDB-397129 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/cve/CVE-2026-82631","name":"CVE-2026-82631 | CVE Analysis and Report","tags":["third-party-advisory"]},{"url":"https://vuldb.com/submit/893793","name":"Submit #893793 | Valkey Project Valkey 9.1.0 Heap Use After Free","tags":["third-party-advisory"]},{"url":"https://github.com/valkey-io/valkey/issues/4198","tags":["issue-tracking"]},{"url":"https://github.com/valkey-io/valkey/pull/4212","tags":["issue-tracking","patch"]},{"url":"https://github.com/user-attachments/files/30111628/PoC.zip","tags":["exploit"]},{"url":"https://github.com/valkey-io/valkey/commit/b2fb0e13f5b4c8c2fb63dcfc2c37a067a0d6d20b","tags":["patch"]},{"url":"https://github.com/valkey-io/valkey/","tags":["product"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":2.1,"vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","baseSeverity":"LOW"}},{"cvssV3_1":{"version":"3.1","baseScore":2.2,"vectorString":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","baseSeverity":"LOW"}},{"cvssV3_0":{"version":"3.0","baseScore":2.2,"vectorString":"CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","baseSeverity":"LOW"}},{"cvssV2_0":{"version":"2.0","baseScore":1.7,"vectorString":"AV:N/AC:H/Au:M/C:N/I:N/A:P/E:POC/RL:OF/RC:C"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","type":"CWE","lang":"en","description":"Use After Free"}]},{"descriptions":[{"cweId":"CWE-119","type":"CWE","lang":"en","description":"Memory Corruption"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-08-31T07:45:13.359Z"},"timeline":[{"time":"2026-08-30T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-08-30T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-08-30T12:15:38.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"VULL (VulDB User)","type":"reporter"}],"tags":["x_open-source"],"x_generator":["VulDB PVTS v202608"]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-31T11:22:07.646542Z","id":"CVE-2026-82631","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-31T11:33:30.966Z"}}]}}}