Double free and use-after-free in FalkorDB RdbLoadDeletedNodes allows remote code execution via crafted RDB
A double free and use-after-free vulnerability in the RdbLoadDeletedNodes function of the RDB graph decoders (src/serializers/decoders/*/decode_graph_entities.c) in FalkorDB before 4.18.1 allows a remote attacker who can issue Redis replication commands (for example, against an instance with no password configured) to cause a denial of service or execute arbitrary code in the redis-server process by supplying a crafted RDB stream whose deleted-nodes buffer length is not a multiple of sizeof(NodeID). The length check relies on ASSERT(), which is compiled out in release builds, so the function continues after freeing the buffer, reading it and freeing it a second time.
CVE-2026-5759
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-5759
FalkorDB
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"cpes": [
"cpe:2.3:a:falkordb:falkordb:*:*:*:*:*:*:*:*"
],
"repo": "https://github.com/FalkorDB/FalkorDB",
"vendor": "FalkorDB",
"modules": [
"RDB serializer / graph decoder"
],
"product": "FalkorDB",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "4.18.1",
"versionType": "semver"
}
],
"programFiles": [
"src/serializers/decoders/current/v19/decode_graph_entities.c",
"src/serializers/decoders/prev/v18/decode_graph_entities.c",
"src/serializers/decoders/prev/v17/decode_graph_entities.c"
],
"collectionURL": "https://github.com/FalkorDB/FalkorDB",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "RdbLoadDeletedNodes_v17"
},
{
"name": "RdbLoadDeletedNodes_v18"
},
{
"name": "RdbLoadDeletedNodes_v19"
}
]
}
]- Related CVEs
- CVE-2026-5759
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #20529 · Revision 1
- Added to Heist Feed
- Publisher date