{"id":"CVE-2025-49844","summary":"Redis Lua Use-After-Free may lead to remote code execution","details":"Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to manipulate the garbage collector, trigger a use-after-free and potentially lead to remote code execution. The problem exists in all versions of Redis with Lua scripting. This issue is fixed in version 8.2.2. To workaround this issue without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL to restrict EVAL and EVALSHA commands.","aliases":["BIT-keydb-2025-49844","BIT-redis-2025-49844","BIT-valkey-2025-49844","GHSA-4789-qfc9-5f9q"],"modified":"2026-09-12T14:19:16.298694Z","published":"2025-10-03T19:27:23.609Z","related":["ALSA-2025:19237","ALSA-2025:19238","ALSA-2025:19345","ALSA-2025:19675","ALSA-2025:20926","ALSA-2025:20955","ALSA-2025:21916","ALSA-2025:21936","SUSE-SU-2025:03499-1","SUSE-SU-2025:03500-1","SUSE-SU-2025:03501-1","SUSE-SU-2025:03502-1","SUSE-SU-2025:03505-1","SUSE-SU-2025:03506-1","SUSE-SU-2025:03507-1","SUSE-SU-2026:20022-1","openSUSE-SU-2025:15600-1","openSUSE-SU-2025:15604-1","openSUSE-SU-2025:20121-1","openSUSE-SU-2026:20003-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-416"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49844.json"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2025/10/07/2"},{"type":"WEB","url":"https://github.com/redis/redis/releases/tag/8.2.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49844.json"},{"type":"ADVISORY","url":"https://github.com/redis/redis/security/advisories/GHSA-4789-qfc9-5f9q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-49844"},{"type":"FIX","url":"https://github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539"},{"type":"EVIDENCE","url":"https://github.com/lastvocher/redis-CVE-2025-49844"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/redis/redis","events":[{"introduced":"0"},{"fixed":"86b64d6098b3cfb839ab9a65e0104c840c696eee"},{"introduced":"d375595d5e3ae2e5c29e6c00a2dc3d60578fd9fc"},{"fixed":"d4c381df7a729c06a5207c4f18d804febe956dc4"},{"introduced":"c9d29f6a918c335bc1778d9f68e521c1bbb36a0f"},{"fixed":"4b03ddfdac5a5c007358df8d08873f508f2fbfe3"},{"introduced":"e91a340e241cf0abe3c6a0c254214fbe4aa1d95f"},{"fixed":"0ebb3381cd146c45f4ea14d5999d257a1649221d"},{"introduced":"4fa8bf356b4bf0f1ce345286a4f02d022a4badcb"},{"fixed":"9829bdbfd9e7eeb8fb6c79ce36bcc77a681824b1"},{"fixed":"d5728cb5795c966c5b5b1e0f0ac576a7e69af539"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"6.2.20"},{"introduced":"7.0"},{"fixed":"7.2.11"},{"introduced":"7.4.0"},{"fixed":"7.4.6"},{"introduced":"8.0.0"},{"fixed":"8.0.4"},{"introduced":"8.2.0"},{"fixed":"8.2.2"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*"}},{"type":"GIT","repo":"https://github.com/valkey-io/valkey","events":[{"introduced":"0"},{"fixed":"97b6663c775193cce6e41c752e7683f000f80ad5"},{"introduced":"2b5c7a0dbd61fd4281ef6166b7d119ba7fe7368c"},{"fixed":"1cac48f92dc938f292480ea229877a18b001bb46"},{"introduced":"67c8683792fc9ab7e295f833478eca180c5e4691"},{"fixed":"5f4bae3ea10174a7c872cc099c953b0e91afa93a"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"7.2.11"},{"introduced":"8.0.0"},{"fixed":"8.0.6"},{"introduced":"8.1.0"},{"fixed":"8.1.4"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:lfprojects:valkey:*:*:*:*:*:*:*:*"}}],"versions":["8.2.2-int","6.2.19","8.0.3","8.2.1","8.2.1-int","7.2.10","8.2.0","7.4.5","7.2.9","6.2.18","7.4.4","8.0.2","8.0.1","7.2.8","7.4.3","8.0.1-int","8.0.0","7.4.2","7.2.7","6.2.17","7.2.6","7.4.1","6.2.16","6.2.15","6.2.14","7.4.0","7.2.5","7.2.4","7.2.3","7.2.2","7.2.1","6.2.13","7.2.0","7.2-rc3","7.2-rc2","6.2.12","7.2-rc1","6.2.11","6.2.10","6.2.9","6.2.8","6.2.7","6.2.6","6.2.5","6.2.4","6.2.3","6.2.2","6.2.1","6.2.0","6.2-rc3","6.2-rc2","6.2-rc1","2.3-alpha0","2.2.0-rc1","2.2-alpha6","2.2-alpha5","2.2-alpha4","2.2-alpha3","2.2-alpha2","2.2-alpha1","2.2-alpha0","v2.0.0-rc1","v2.1.1-watch","v1.3.11","v1.3.10","v1.3.9","v1.3.8","v1.3.7","1.3.6","vm-playpen","8.0.5","8.0.4","8.1.3","8.1.2","8.1.1","8.1.0","7.2.5-rc1","7.2.4-rc1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-49844.json","vanir_signatures_modified":"2026-09-12T14:19:16Z","vanir_signatures":[{"target":{"file":"src/defrag.c","function":"defragStream"},"deprecated":false,"digest":{"function_hash":"231823367469822555940742382288933873230","length":564},"id":"CVE-2025-49844-1bff8e25","signature_type":"Function","signature_version":"v1","source":"https://github.com/redis/redis/commit/9829bdbfd9e7eeb8fb6c79ce36bcc77a681824b1"},{"signature_version":"v1","source":"https://github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539","target":{"file":"deps/lua/src/lparser.c","function":"luaY_parser"},"deprecated":false,"digest":{"length":486,"function_hash":"321506632171630486713949632549336694198"},"id":"CVE-2025-49844-27870a37","signature_type":"Function"},{"target":{"function":"defragStreamConsumerGroup","file":"src/defrag.c"},"deprecated":false,"digest":{"function_hash":"288446850232562980440863683026214219231","length":274},"id":"CVE-2025-49844-2f43472c","signature_type":"Function","signature_version":"v1","source":"https://github.com/redis/redis/commit/9829bdbfd9e7eeb8fb6c79ce36bcc77a681824b1"},{"signature_version":"v1","source":"https://github.com/redis/redis/commit/9829bdbfd9e7eeb8fb6c79ce36bcc77a681824b1","target":{"file":"src/defrag.c","function":"defragStreamConsumerPendingEntry"},"deprecated":false,"digest":{"function_hash":"269273620982420028349368441170132491277","length":316},"id":"CVE-2025-49844-77eb7a7a","signature_type":"Function"},{"target":{"file":"src/ebuckets.c","function":"ebDefragRaxBucket"},"deprecated":false,"digest":{"function_hash":"278644848284550820802314798222846137842","length":1028},"id":"CVE-2025-49844-90636aee","signature_type":"Function","signature_version":"v1","source":"https://github.com/redis/redis/commit/9829bdbfd9e7eeb8fb6c79ce36bcc77a681824b1"},{"deprecated":false,"digest":{"line_hashes":["138051693839747285096021458702403893111","217792725282971082265874066493719589089","314104092114484613540366304337620153799","289838893004834880788220210160086127357","261640981466269970594854736063516974006","310366546339259136490471016273997718966","32133616761046458240624936400794999717","99379125398230922191097416962833631765","141940563608976522218604452044168104567","11220539234012554404348468137403013259","232481408480410736814504528475544114533","51866787026042368566811775065054533143","63433160957720909299274972010261027892","294256383012553041837446580576855146212","89382824653771948252974872163098475979","125843216691037721002607267089725657746","134688872856233222990888740724026394481","48326925826003410695033980425698456909","67996540693667022215470987524713099413","136018837045987266595679134463638862968","333375019022085398980596780008619891568","29915176327139359699601310212482016515","78998988978891701179665002117073134153","17549832641806627852119609812055732197","42446296350911664275182979645220907226","138975645959192329129097852787418759626","149158348708285902087935202222825724476","142605691491218526884160292427755441470","11688604414306184430853572012154672997","148558868641076683043063174755617384651","21028590655927164121484625827791262156","46089719024847428095945812658394875858","132152125759967892984304802846013499407","252710555466710673955941017321669831749","239262572873833474405578058531672783359","66720547795711375935066349761282397334","228824034014002333793286778567671435553","140423370034328928159919286536412352374","34259259009794645587500028432093165186","32714089352387174407290605263289841726","142160850842147572350805881228483295868","232067484793209163755223773554912439711","294077731618297973044671231562754097105","216744741664175839129273154417262477100","995446791351321522154638928135859875","191256389506455193250670539930255527581","302732920957766076804960979292947649450","26025635131505467470119512320366390742"],"threshold":0.9},"id":"CVE-2025-49844-9771037c","signature_type":"Line","signature_version":"v1","source":"https://github.com/redis/redis/commit/9829bdbfd9e7eeb8fb6c79ce36bcc77a681824b1","target":{"file":"src/defrag.c"}},{"signature_type":"Line","signature_version":"v1","source":"https://github.com/redis/redis/commit/9829bdbfd9e7eeb8fb6c79ce36bcc77a681824b1","target":{"file":"src/ebuckets.c"},"deprecated":false,"digest":{"line_hashes":["244502848865928883332908724730119052311","141797934241402737746765354854429761657","121189225860232617002299124820059699861","325221416935840389820722274695630580016","303490719280172131208887830823944185073","43864785869962988976065089075595503762","53490938445701540411614375924248395921","23408075982072842741195268914820996812","320872889493649556307334100222506094780","244730142365431892013328866901959544225","170283847187515741955371454705299138105","235864933409515329941478345542925607458"],"threshold":0.9},"id":"CVE-2025-49844-b3bba80f"},{"deprecated":false,"digest":{"function_hash":"43521981978878587750908260601344872279","length":307},"id":"CVE-2025-49844-c715e681","signature_type":"Function","signature_version":"v1","source":"https://github.com/redis/redis/commit/9829bdbfd9e7eeb8fb6c79ce36bcc77a681824b1","target":{"file":"src/defrag.c","function":"activeDefragAlloc"}},{"deprecated":false,"digest":{"line_hashes":["57570898305689458958332301683931575571","36906201956794226912783182277021364422","206654048748389588612752319617331375802","68762524842066567607259279459644233204","282825045466725342599148073302753308383","152482350335428791735637751027103377835","119984268715756700597320888926724857104","120339940818362166945376559839411645577","32217262958225340175258903683352322637","49635208541836677045240184656187964552"],"threshold":0.9},"id":"CVE-2025-49844-e0301299","signature_type":"Line","signature_version":"v1","source":"https://github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539","target":{"file":"deps/lua/src/lparser.c"}},{"id":"CVE-2025-49844-f6afd884","signature_type":"Function","signature_version":"v1","source":"https://github.com/redis/redis/commit/9829bdbfd9e7eeb8fb6c79ce36bcc77a681824b1","target":{"file":"src/defrag.c","function":"activeDefragHExpiresOB"},"deprecated":false,"digest":{"length":654,"function_hash":"307600606145985118090248030247413925373"}}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}