Bug#1144647: postgis: CVE-2026-73515

[Salvatore Bonaccorso]

Source: postgis
Version: 3.6.4+dfsg-2
Severity: important
Tags: security upstream
Forwarded: https://gitea.osgeo.org/postgis/postgis/pulls/669
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for postgis.

CVE-2026-73515[0]:
| PostGIS before 3.7.0beta2 contains an out-of-bounds read
| vulnerability that allows attackers to cause memory disclosure or a
| server crash by supplying a malformed FlatGeobuf buffer. The
| FlatGeobuf property metadata decoder verifies that a string length
| field is present but fails to verify that the subsequent string body
| is contained within the supplied buffer before materializing it into
| a SQL-visible value, enabling memory disclosure or denial of
| service.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-73515
    https://www.cve.org/CVERecord?id=CVE-2026-73515
[1] https://gitea.osgeo.org/postgis/postgis/pulls/669
[2] https://gitea.osgeo.org/postgis/postgis/commit/767fa40644253281f6d4e8b06811489b0a0f9b0d

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore