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Vendor Solution
Upgrade to psqlODBC 18.00.0006 or later. The driver rejects a keyset value that does not fit its buffer, and the query fails with SQLSTATE HY000.
Vendor Workaround
Set UpdatableCursors=0 in the connection string or DSN, so the driver does not add the keyset columns.
Tracking
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Mon, 02 Nov 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Postgresql
Postgresql psqlodbc |
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| Vendors & Products |
Postgresql
Postgresql psqlodbc |
Mon, 02 Nov 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 02 Nov 2026 19:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | For updatable cursors, which are enabled by default, psqlODBC adds hidden ctid and, for tables with OIDs, oid columns to the query. It copies each value into a 32-byte stack buffer using the length the server sent, without checking it against the buffer size, so a value of 32 bytes or more writes past the buffer. A server not trusted under current SSL settings can send such a value. So can any database user who can create a view with its own column named ctid that the application reads with an updatable cursor. Builds with _FORTIFY_SOURCE abort; other builds overwrite adjacent stack memory. Versions before psqlODBC 18.00.0006 are affected. | |
| Title | psqlODBC stack buffer overflow copying ctid and oid values for updatable cursors | |
| Weaknesses | CWE-121 CWE-787 |
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| References |
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| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: PostgreSQL
Published:
Updated: 2026-11-02T19:33:08.506Z
Reserved: 2026-10-30T19:25:18.920Z
Link: CVE-2026-120067
Updated: 2026-11-02T19:33:00.937Z
Status : Awaiting Analysis
Published: 2026-11-02T19:18:04.120
Modified: 2026-11-02T20:17:40.043
Link: CVE-2026-120067
No data.
OpenCVE Enrichment
Updated: 2026-11-02T20:45:07Z