Type confusion in DBI
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 4 fixed, 2 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-843 and the CVSS impact.
Summary
DBI versions before 1.654 for Perl incorrectly treat numeric values as strings in sql_type_cast_svpv. When casting to SQL_NUMERIC, sql_type_cast_svpv passes the string pointer and length of the SV to grok_number without stringifying it first. An integer (IV) or floating-point (NV) value has no valid string pointer, so grok_number reads from an invalid address, triggering a segmentation fault. This is reachable in Perl using the sql_type_cast function: my $num = 42; DBI::sql_type_cast( $num, DBI::SQL_NUMERIC, 0 );
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | DBI | before 1.654 | 1.654 | Patch available | CNA |
- DBI Vendor— Affected before 1.654 Fixed in 1.654 Patch available CNA
Remediation
- Fix · CNA DBI Fixed in 1.654
Red Hat 4 advisories
- RHSA-2026:85916 Released 2026-10-20 · Red Hat rating Importantperl-DBI:1.641 security update
- Red Hat Enterprise Linux AppStream (v. 8) perl-DBI-1.641-11.module+el8.10.0+25025+b6ff827c.aarch64::perl-DBI:1.641, perl-DBI-1.641-11.module+el8.10.0+25025+b6ff827c.ppc64le::perl-DBI:1.641, perl-DBI-1.641-11.module+el8.10.0+25025+b6ff827c.s390x::perl-DBI:1.641 +7
- RHSA-2026:76760 Released 2026-10-08 · Red Hat rating Importantperl-DBI security update
- Red Hat Enterprise Linux AppStream (v. 9) perl-DBI-1.643-9.el9_8.7
- RHSA-2026:77576 Released 2026-10-07 · Red Hat rating Importantperl-DBI security update
- Red Hat Enterprise Linux BaseOS (v. 8) perl-DBI-1.641-4.el8_10
Show 1 more Red Hat advisories
- RHSA-2026:76762 Released 2026-10-06 · Red Hat rating Importantperl-DBI security update
- Red Hat Enterprise Linux AppStream (v. 10) perl-DBI-1.643-26.el10_2.7
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:76762 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2026:85916 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:76760 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2026:77576 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-88815
- 2026-10-07 Fix available: RHSA-2026:76762 · Red Hat
- 2026-10-07 Fix available: Red Hat Enterprise Linux AppStream (v. 10) · Red Hat
- 2026-10-07 Fix available: RHSA-2026:77576 · Red Hat
- 2026-10-08 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 8) · Red Hat
- 2026-10-09 Fix available: RHSA-2026:76760 · Red Hat
- 2026-10-20 Fix available: RHSA-2026:85916 · Red Hat
- 2026-10-21 Fix available: Red Hat Enterprise Linux AppStream (v. 8) · Red Hat
References
Sources
- CVE-2026-88815 · CVE Program
- CVE-2026-88815 · NVD
- FIRST EPSS
- CVE-2026-88815 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences