CPANSA-perl-2026-57432: perl vulnerability
| Publisher |
giterlizzi |
Document category |
csaf_security_advisory |
| Initial release date |
2026-07-13T00:00:00 |
Engine |
CSAF Perl Toolkit 0.26 |
| Current release date |
2026-07-13T00:00:00 |
Build Date |
|
| Current version |
1 |
Status |
final |
| CVSS v3.1 Base Score |
8.4
|
Severity |
|
| Original language |
|
Language |
en |
| Also referred to |
|
Vulnerability Description
Perl versions through 5.43.10 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack. S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds. A template derived from untrusted input can read heap memory past the buffer and return it to the caller.
Vulnerabilities
CVE-2026-57432
Vulnerability DescriptionPerl versions through 5.43.10 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack.
S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds.
A template derived from untrusted input can read heap memory past the buffer and return it to the caller.
| Weakness |
CWE-125 : Out-of-bounds Read
|
Product status
Known affected
| Product |
Score |
| perl greater than 0 and less than 5.40.5 |
|
| perl greater than or equal 5.41.0 and less than 5.42.3 |
|
| perl greater than or equal 5.43.0 and less than 5.43.11 |
|
Fixed
- perl greater than or equal 5.40.5 and less than 5.42.0
- perl greater than or equal 5.42.3 and less than 5.43.0
- perl greater than or equal 5.43.11
giterlizzi
Namespace: https://github.com/giterlizzi/
gdt@cpan.org
References
Revision history
| Version |
Date of the revision |
Summary of the revision |
| 1 |
Mon Jul 13 00:00:00 2026 |
First release |
Sharing rules
TLP:WHITE
For the TLP version see: https://www.first.org/tlp/