8.6.6
Security 10
- Fix miscalculated buffer size in CMSketch RDB loading that may lead to heap out-of-bounds write (CVE-2026-62356)
- Fix out-of-bounds access in TopK heap cleanup path (MOD-15410)
- Fix use-after-free in the TLS pending-data list when a command closes another pending connection
- Fix ACL key permission bypass in SORT, GEORADIUS/GEORADIUSBYMEMBER and XREAD/XREADGROUP where validated keys could differ from actually accessed keys
- Fix memory corruption during RDB loading caused by out-of-range SLOT_INFO slot id that may lead to Remote Code Execution
- Fix Vector Sets missing node level validation when loading from RDB that may lead to out-of-bounds access
- Fix Vector Sets use-after-free when VREM mutates the HNSW graph while background VSIM threads are running
- Fix Vector Sets negative hnsw_search() return treated as huge unsigned count, reading past the end of result arrays
- Fix TLS client certificate authentication bypass where Common Name containing embedded NUL byte was truncated, allowing client to authenticate as another ACL user
- Fix use-after-free in the blocked-client list when reprocessing a command evicts another client blocked on the same key
From Redis
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