{"id":"CVE-2021-3470","aliases":["ALPINE-CVE-2021-3470","AZL-6852","BELL-CVE-2021-3470","DEBIAN-CVE-2021-3470","EUVD-2021-26792","GHSA-mqmr-8cxh-pqf6","OESA-2021-1172","UBUNTU-CVE-2021-3470"],"status":"published","title":"A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0...","description":"A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01144,"percentile":0.66944,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-119","CWE-787"],"published":"2021-03-31T13:44:13Z","modified":"2026-11-03T06:32:33Z","fixes":[{"ecosystem":"Alpine:v3.12","package":"redis","fixed_in":["5.0.11-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"redis","fixed_in":["6.0.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"redis","fixed_in":["6.2.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"redis","fixed_in":["6.2.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"redis","fixed_in":["6.2.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"redis","fixed_in":["6.2.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"redis","fixed_in":["6.2.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"redis","fixed_in":["6.2.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"redis","fixed_in":["6.2.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"redis","fixed_in":["6.2.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"redis","fixed_in":["6.2.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"redis","fixed_in":["6.2.0-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"redis","fixed_in":["6.2.0-r0"],"sources":["osv"]},{"ecosystem":"Azure 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Tracking","Patch","Third Party Advisory","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3470","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-mqmr-8cxh-pqf6"},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-3470","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2021-3470","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-3470","tags":["advisory"]},{"url":"https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1172","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-3470","tags":["report"]},{"url":"https://github.com/redis/redis/pull/7963","tags":["report"]},{"url":"https://github.com/redis/redis/commit/9824fe3e392caa04dc1b4071886e9ac402dd6d95","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-3470","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-3470","description":"A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.","status":"published","published":"2021-03-31T13:44:13Z","modified":"2024-08-03T16:53:17.725Z","cwes":["CWE-119"],"updated_at":"2026-11-02T14:33:04.020035Z"}],"euvd":[{"id":"EUVD-2021-26792","description":"A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.","status":"published","published":"2021-03-31T13:44:13Z","modified":"2024-08-03T16:53:17Z","updated_at":"2026-11-03T03:25:13.052236Z"}],"ghsa":[{"id":"GHSA-mqmr-8cxh-pqf6","title":"A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0...","description":"A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.","status":"published","published":"2022-05-24T17:46:00Z","modified":"2023-01-29T05:06:12Z","cwes":["CWE-119","CWE-787"],"updated_at":"2026-11-02T14:45:58.127346Z"}],"nvd":[{"id":"CVE-2021-3470","description":"A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.","status":"published","published":"2021-03-31T14:15:20.937Z","modified":"2026-06-17T04:05:09.757Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-119","CWE-787"],"updated_at":"2026-11-02T14:06:51.197859Z"}],"osv":[{"id":"ALPINE-CVE-2021-3470","description":"A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.","status":"published","published":"2021-03-31T14:15:20.937Z","modified":"2026-11-03T06:32:33.618018017Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-03T07:17:20.312441Z"},{"id":"AZL-6852","title":"CVE-2021-3470 affecting package redis for versions less than 5.0.5-7","description":"A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.","status":"published","published":"2021-03-31T14:15:20Z","modified":"2026-04-21T04:38:27.087179Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:28:08.630357Z"},{"id":"BELL-CVE-2021-3470","title":"CVE-2021-3470 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:15:10.824558Z","modified":"2026-01-26T09:46:39.565604Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:28:16.5265Z"},{"id":"CVE-2021-3470","description":"A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. 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Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.","status":"published","published":"2021-03-31T14:15:20.937Z","modified":"2026-10-23T18:04:50.783585753Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:45:35.233346Z"},{"id":"OESA-2021-1172","title":"redis security update","description":"Redis is an advanced key-value store. It is often referred to as a dattructure server since keys can contain strings, hashes ,lists, sets anorted sets.\r\n\r\nSecurity Fix(es):\r\n\r\nA heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc\u0026apos;s malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.(CVE-2021-3470)","status":"published","published":"2021-05-06T11:04:24Z","modified":"2026-08-18T01:15:34.154129224Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:52:38.987987Z"},{"id":"UBUNTU-CVE-2021-3470","description":"A heap overflow issue was found in Redis in versions before 5.0.10, before 6.0.9 and before 6.2.0 when using a heap allocator other than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.","status":"published","published":"2021-03-31T14:15:00Z","modified":"2026-04-14T09:49:33.405671Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:54:27.870979Z"}]}}