Skip to content
Fencer Vulns
critical 9.1

CVE-2026-73194 json

DBI versions before 1.652 for Perl allow a heap out-of-bounds write via an unvalidated numeric placeholder that sets the binder counter in preparse

published 2026-08-15 2 mo ago modified 2026-08-28 2 mo ago also EUVD-2026-59745

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

DBI versions before 1.652 for Perl allow a heap out-of-bounds write via an unvalidated numeric placeholder that sets the binder counter in preparse.

preparse reserves seven output bytes per input byte, the width of the longest ':p99999' expansion. The ':N' branch parses the number with `atoi(src)` and assigns it to the binder counter with no range check, so a statement containing ':2147483648' leaves the counter negative (-2147483648 with glibc, where atoi wraps). Each following '?' then expands through `sprintf(start, ":p%d", idx++)` to ':p-2147483648', 14 bytes with the terminating NUL where the buffer budgets 7. The placeholder limit added in 1.650 tests the counter against 99,999, which a negative counter passes.

Any caller that preparses an untrusted statement into ':pN' style placeholders gets a heap out-of-bounds write that grows with the number of '?' marks following the poisoned placeholder. The '?' and '%s' return styles compare the parsed number against the expected sequence and error out, and are unaffected.

Patch / fix

  • perl dbi 1.652
  • libdbi-perl Debian 12 1.643-4+deb12u2
  • libdbi-perl Debian 13 1.652-2~deb13u1
  • libdbi-perl Debian 14 1.652-1

debian advisories DEBIAN-CVE-2026-73194

  • libdbi-perl Ubuntu 22.04 LTS 1.643-3ubuntu0.3
  • libdbi-perl Ubuntu 24.04 LTS 1.643-4ubuntu0.3
  • libdbi-perl Ubuntu 26.04 LTS 1.647-1ubuntu0.26.04.3
  • libdbi-perl Ubuntu Pro 14.04 LTS 1.630-1ubuntu0.1~esm8
  • libdbi-perl Ubuntu Pro 16.04 LTS 1.634-1ubuntu0.2+esm4
  • libdbi-perl Ubuntu Pro 18.04 LTS 1.640-1ubuntu0.3+esm3
  • libdbi-perl Ubuntu Pro 20.04 LTS 1.643-1ubuntu0.1+esm3

ubuntu advisories UBUNTU-CVE-2026-73194

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • perl-DBI RHEL 8 1.641-3.el8_10
  • perl-DBI RHEL 9 1.643-9.el9_8.6
  • perl-DBI RHEL 10.2 1.643-26.el10_2.6
  • perl-DBI RHEL 8 1.641-10.module+el8.10.0+24875+bc962974

red hat advisories RHSA-2026:71608RHSA-2026:71422RHSA-2026:70753RHSA-2026:69112

  • perl-DBI openSUSE Tumbleweed 1.653.0-1.1

opensuse advisories openSUSE-SU-2026:11754-1

  • perl-DBI AlmaLinux 9 1.643-9.el9_8.6
  • perl-DBI AlmaLinux 8 1.641-3.el8_10
  • perl-DBI AlmaLinux 10 1.643-26.el10_2.6
  • perl-DBI AlmaLinux 8 1.641-10.module_el8.10.0+4282+4ee1dbd0

almalinux advisories ALSA-2026:71422ALSA-2026:71608ALSA-2026:70753ALSA-2026:69112

  • perl-DBI Rocky Linux 8 1.641-3.el8_10
  • perl-DBI Rocky Linux 9 1.643-9.el9_8.6
  • perl-DBI Rocky Linux 10 1.643-26.el10_2.6
  • perl-DBI Rocky Linux 8 1.641-10.module+el8.10.0+40328+bc090241
  • perl-DBI Rocky Linux 8 1.641-10.module+el8.10.0+40328+f4c7f87b
  • perl-DBI Rocky Linux 8 1.641-10.module+el8.10.0+40328+3ea70367
  • perl-DBI Rocky Linux 8 1.641-10.module+el8.10.0+40328+0878361a

rocky linux advisories RLSA-2026:71608RLSA-2026:71422RLSA-2026:70753RLSA-2026:69112

  • perl-DBI Azure Linux 3.0 1.652-1

azure linux advisories AZL-96704

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-73194 updated cvss 7.3

perl-DBI: DBI for Perl: Heap out-of-bounds write via unvalidated numeric placeholder

  • Red Hat Enterprise Linux 6 perl-DBI 1.609-4.el6
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 perl-DBI 1.609-4.el6
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 8) perl-DBI 1.641-10.module+el8.10.0+24875+7c5253dc, perl-DBI 1.641-10.module+el8.10.0+24875+bc962974
    fixed: vendor fix RHSA-2026:69112
  • Red Hat Enterprise Linux AppStream (v. 9) perl-DBI 1.643-9.el9_8.6
    fixed: vendor fix RHSA-2026:71422
  • Red Hat Enterprise Linux AppStream (v. 10) perl-DBI 1.643-26.el10_2.6
    fixed: vendor fix RHSA-2026:70753
  • Red Hat Enterprise Linux BaseOS (v. 8) perl-DBI 1.641-3.el8_10
    fixed: vendor fix RHSA-2026:71608

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Classification

Weakness
  • CWE-1284 Improper Validation of Specified Quantity in Input
  • CWE-787 Out-of-bounds Write

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.