Eclipse Openj9

In Eclipse OpenJ9 versions prior to 0.63.0, the JITServer component fails to perform cross-field validation on attacker-controlled `_size`, `_paddingSize`, and `_dataOffset` fields during `DataDescriptor` message deserialization. An unauthenticated remote attacker can send a crafted network payload that triggers an unsigned integer underflow in `DataDescriptor::getPayloadSize()` and `DataDescriptor::getNextDescriptor()`. This results in an out-of-bounds heap read and an immediate process crash (SIGSEGV), causing a denial of service.

Published: 2026-10-21T08:00:32.804Z
Updated: 2026-10-26T17:57:34.946Z

In Eclipse OpenJ9 versions prior to 0.63.0, the JITServer component is vulnerable to a pre-authentication remote denial of service. When processing the initial 4-byte length field of an incoming TCP connection, an integer overflow in `MessageBuffer::computeRequiredCapacity()` causes the receiving compilation worker thread to enter an infinite loop consuming ~100% CPU. An unauthenticated remote attacker can exploit this by opening a small number of crafted TCP connections to exhaust the entire worker thread pool, silently halting compilation services for all connected client JVMs.

Published: 2026-10-21T07:57:16.912Z
Updated: 2026-10-26T17:57:35.098Z

In Eclipse OpenJ9 versions up to 0.63.0, the JITServer component is vulnerable to denial of service due to improper boundary checks during protocol message and reply handling. An unauthenticated remote attacker or malicious JITServer can transmit malformed network payloads that cause out-of-bounds heap reads, immediately crashing the JITServer daemon or client JVM process via a segmentation fault (SIGSEGV).

Published: 2026-10-21T08:03:26.062Z
Updated: 2026-10-26T17:57:34.803Z

In Eclipse OpenJ9 versions up to 0.63, opening a supplied diagnostic dump bundle with the jdmpview tool, or equivalent DTFJ code, may cause the analyst's machine to read an arbitrary local file named inside the bundle and send its contents to an arbitrary remote host.

Published: 2026-10-20T14:08:17.229Z
Updated: 2026-10-20T15:39:43.964Z

In Eclipse Open9J versions 0.21 to 0.58, a pre-authentication remote attacker can crash JITServer by sending a 32-byte crafted TCP message.

Published: 2026-05-05T12:29:09.667Z
Updated: 2026-07-15T00:40:27.495Z