Security8.8.2
Redis 8.8.2 Security Release
This release fixes multiple critical security vulnerabilities including heap buffer overflows, use-after-free issues, ACL bypass flaws, and TLS authentication bypasses across CMSketch, TopK, vector sets, and command handling. Applications should update immediately to patch remote code execution risks and unauthorized access issues.
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 - 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 - TLS client certificate authentication bypass: a Common Name containing an embedded NUL byte was truncated, allowing a client to authenticate as another (possibly privileged) ACL user
- #15594 Use-after-free in the blocked-client list when reprocessing a command evicts another client blocked on the same key
securitycverdbacltlscritical
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