Redis 8.4.6 - Security Fixes
This release addresses multiple critical security vulnerabilities including buffer overflows, use-after-free bugs, ACL permission bypasses, and out-of-bounds access issues in RDB loading and Vector Sets. These fixes prevent potential remote code execution and memory corruption attacks.
Update urgency: SECURITY: There are security fixes in the release.
Security fixes
- (CVE-2026-62356) Miscalculated buffer size in
CMSketchRDB loading may lead to heap OOB write - Out-of-bounds access in TopK heap cleanup path (MOD-15410)
- Use-after-free in the TLS pending-data list when a command closes another pending connection
- #15478 ACL key permission bypass in
SORT,GEORADIUS/GEORADIUSBYMEMBERandXREAD/XREADGROUP: the keys validated by ACL could differ from the keys the command actually accesses - #14847 Out-of-bounds
argvaccess during key extraction when checking ACL permissions of a KEYNUM keyspec command (e.g.EVAL) with wrong arity - A malicious RDB payload with an out-of-range
SLOT_INFOslot id causes memory corruption during RDB loading, which may lead to Remote Code Execution - Vector Sets: missing node level validation when loading a vector set from RDB may lead to out-of-bounds access
- Vector Sets: use-after-free when
VREMmutates the HNSW graph while backgroundVSIMthreads are still running - Vector Sets: a negative
hnsw_search()return was treated as a huge unsigned count, reading past the end of the result arrays - #15594 Use-after-free in the blocked-client list when reprocessing a command evicts another client blocked on the same key
Source: original entry ↗
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