High severity · published Sep 2, 2026
CVE-2026-84484
ION-DTN before 4.2.0 Out-of-Bounds Read via decodeSdnv
7.5
CVSS
0.9%
EPSS
No
On KEV
Description
ION-DTN versions before 4.2.0 contain an out-of-bounds read vulnerability in the decodeSdnv function that allows unauthenticated remote attackers to read memory by sending truncated SDNV values. Attackers can send a UDP datagram to the LTP link service input port with a truncated SDNV to trigger reads up to nine bytes past buffer boundaries and underflow byte counters.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IO
ION-DTN · nasa-jpl
before 4.2.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84484
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84484
github.com
https://github.com/nasa-jpl/ION-DTN
github.com
https://github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/library/ion.c#L1693
github.com
https://github.com/nasa-jpl/ION-DTN/blob/ion-open-source-4.1.4/ici/library/platform.c#L1982
github.com
https://github.com/nasa-jpl/ION-DTN/commit/d52d22bdd383798712357f86a2778757f740e812
github.com
https://github.com/nasa-jpl/ION-DTN/releases/tag/ion-open-source-4.2.0
github.com
https://github.com/nasa-jpl/ION-DTN/security/advisories/GHSA-85pw-28vw-2jf7
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