Hi,

The following vulnerability was published for libdbi-perl.

CVE-2026-73193[0]:
| DBI versions before 1.652 for Perl allow a heap out-of-bounds write
| on 32-bit perl via an integer wraparound in the output buffer size
| computed by preparse.  preparse reserves its output buffer with
| `newSV(strlen(statement) * 7 + 16)`, budgeting seven output bytes
| per input byte for the longest ':p99999' expansion. The product is
| computed in STRLEN, which is 32 bits wide on a 32-bit perl build, so
| a statement of 613,566,757 bytes multiplies to 4,294,967,299, wraps
| modulo 2^32 to 3, and reserves 19 bytes. The parser then copies the
| statement out through a raw pointer with no capacity check, writing
| the whole 585 MB input past the end of the allocation. The 99,999
| placeholder limit does not bound this path, which is reached by
| ordinary non-placeholder content.  Any caller that passes an
| untrusted statement of that length to preparse on a 32-bit perl gets
| a heap out-of-bounds write of attacker controlled bytes. Builds with
| a 64-bit STRLEN are not affected, since the wrap there needs a
| statement of about 2.3 exabytes.


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-2026-73193
https://www.cve.org/CVERecord?id=CVE-2026-73193
[1] https://lists.security.metacpan.org/cve-announce/msg/42707360/

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore

We believe that the bug you reported is fixed in the latest version of
libdbi-perl, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1144470@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
gregor herrmann <gregoa@debian.org> (supplier of updated libdbi-perl package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sat, 15 Aug 2026 17:13:20 +0200
Source: libdbi-perl
Architecture: source
Version: 1.652-1
Distribution: unstable
Urgency: medium
Maintainer: Debian Perl Group <pkg-perl-maintainers@lists.alioth.debian.org>
Changed-By: gregor herrmann <gregoa@debian.org>
Closes: 1144470 1144471
Changes:
 libdbi-perl (1.652-1) unstable; urgency=medium
 .
   * Import upstream version 1.652.
     + Limit statements to 292 Mb in preparse (CVE-2026-73193)
       (Closes: #1144470)
     + Force placeholder limit on :# and :p# too (CVE-2026-73194)
       (Closes: #1144471)
   * Install new SECURITY.md file.
   * Refresh t__40profile.t__NTP.patch (offset).
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Files:
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Git-Tag-Info: tag=f7c427d0b058284f51bf3866709ca4c443188e0c fp=d1e1316e93a760a8104d85fabb3a68018649aa06
Git-Tag-Tagger: gregor herrmann <gregoa@debian.org>
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