Vulnerability · Published Oct 20, 2026 · Assigned by CPANSec
CVE-2026-108518DBI versions before 1.656 for Perl crash via type confusion in dbi_profile when a database handle is destroyed under a Profile Path with an {attr} element
Low 2.9
In plain English
A low-severity type confusion in DBI. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
DBI versions before 1.656 for Perl crash via type confusion in dbi_profile when a database handle is destroyed under a Profile Path with an {attr} element. An {attr} element names a database handle attribute, which dbi_profile reads from the handle's inner hash. It expects the inner handle as a reference and dereferences it, but a handle that is being destroyed hands back the inner hash itself, so the dereference yields the hash's bucket array. A type check on that pointer usually fails and the call goes unprofiled. When the memory it addresses passes the check, the attribute lookup dereferences a NULL or invalid pointer and the process dies on SIGSEGV. The Path is set by the application, by the Profile handle attribute, or by the DBI_PROFILE environment variable, so `DBI_PROFILE={ImplementorClass}` can crash an unmodified program.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libdbi-perl | no fix listed | DEBIAN-CVE-2026-108518 |
| Debian:13 | libdbi-perl | no fix listed | DEBIAN-CVE-2026-108518 |
| Debian:14 | libdbi-perl | 1.656-1 | DEBIAN-CVE-2026-108518 |
| Ubuntu:22.04:LTS | libdbi-perl | no fix listed | UBUNTU-CVE-2026-108518 |
| Ubuntu:24.04:LTS | libdbi-perl | no fix listed | UBUNTU-CVE-2026-108518 |
| Ubuntu:26.04:LTS | libdbi-perl | no fix listed | UBUNTU-CVE-2026-108518 |
| Ubuntu:26.10 | libdbi-perl | no fix listed | UBUNTU-CVE-2026-108518 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| DBI | 0 – before 1.656 |
Weakness: CWE-843 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- https://github.com/perl5-dbi/dbi/security/advisories/GHSA-7393-6f8r-fhh3 vendor-advisory
- https://github.com/perl5-dbi/dbi/commit/c2ff4df575d7af625bb4d0d1ef7539f90b22d8b2.patch patch
- https://metacpan.org/release/HMBRAND/DBI-1.656/changes release-notes
- http://www.openwall.com/lists/oss-security/2026/10/20/37