On 32-bit builds, quoting very long strings with the pdo_dblib or pdo_firebird drivers overflows an integer and writes out of bounds.
Affected versions
| Branch | Affected | Fixed in |
|---|---|---|
| PHP 8.3 | < 8.3.14 | 8.3.14 |
| PHP 8.2 | < 8.2.26 | 8.2.26 |
| PHP 8.1 | < 8.1.31 | 8.1.31 |
Older branches: not assessed
Exploitation conditions
- 32-bit builds only
- pdo_dblib or pdo_firebird in use
Remediation
Upgrade to 8.1.31, 8.2.26, 8.3.14 or a later release of your branch. If your branch is end-of-life, move to a supported branch. Distribution packages may carry a backported fix under an older version number; confirm with your vendor's security tracker.
A version number alone cannot prove patch status. Linux distributions and hosting providers often backport security fixes without changing the version. Check your vendor’s changelog.
Severity scores
| CVSS | Source | Vector |
|---|---|---|
| 9.8 v3.1 | NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
References
Data provenance
Secondary sources · pending primary verificationLast reviewed: Oct 24, 2026 · Source
Notes: The CVE description text mentions ldap_escape(); the php-src advisory identifies the PDO quoters (ldap_escape() is CVE-2024-8932).