EUVD-2026-44770Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Unauthenticated network-reachable transport parsing bug with a single crafted packet (AV:N/AC:L/PR:N/UI:N); impact is a server crash only, so C:N/I:N/A:H.
Primary rating from Vendor (github).
CVSS VectorVendor: github
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3DescriptionCVE.org
TDengine is a time-series database optimized for Internet of Things devices. Prior to 3.4.1.15, source/libs/transport/src/transComm.c transDecompressMsg() read STransCompMsg.contLen when pHead->comp == 1 without first validating that the RPC packet contained the 8-byte STransCompMsg structure, causing an unauthenticated out-of-bounds read, uncontrolled allocation, integer underflow, and server crash. This issue is fixed in version 3.4.1.15.
AnalysisAI
Denial of service in TDengine time-series database versions prior to 3.4.1.15 allows unauthenticated remote attackers to crash the server by sending a malformed compressed RPC packet. The transDecompressMsg() function trusts a compression-length field without verifying the packet is large enough to contain the 8-byte STransCompMsg header, leading to an out-of-bounds read, uncontrolled/underflowed allocation, and process crash. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the ability to send a single crafted RPC message to the TDengine transport listener with the packet header compression flag set (pHead->comp == 1) while the packet is deliberately shorter than the 8-byte STransCompMsg structure it claims to carry. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, base 7.5) is internally consistent: network-reachable, low complexity, no authentication, no user interaction, and an availability-only impact - matching the described crash with no confidentiality or integrity loss. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with network reachability to a TDengine server sends a crafted RPC packet with the compression flag set (comp == 1) but truncated so it does not contain the full 8-byte STransCompMsg header. transDecompressMsg() reads contLen past the buffer end, triggering an out-of-bounds read and underflowed allocation that crashes taosd, taking the database offline. … |
| Remediation | Vendor-released patch: upgrade TDengine to version 3.4.1.15 or later, which adds validation that the RPC packet contains the full 8-byte STransCompMsg structure before reading contLen. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and document all TDengine deployments in production, including their current versions. …
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Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Buffer Overflow
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External POC / Exploit Code
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