Bug 2554507 (CVE-2026-110753)

Summary: CVE-2026-110753 perl-text-csv_xs: perl-text-csv_xs: Denial of Service via use-after-free when parsing empty rows
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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A flaw was found in perl-text-csv_xs. This flaw allows an attacker who supplies specially crafted CSV input to trigger a Denial of Service (DoS). When processing CSV data configured with bound column variables, the parser improperly releases memory references upon encountering empty rows. Subsequent access to this freed memory leads to a use-after-free condition, causing the application to crash.
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Bug Depends On: 2555380, 2555381    
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Description OSIDB Bzimport 2026-10-16 22:22:17 UTC 
Text::CSV_XS versions from 1.46 before 1.65 for Perl have a use-after-free of bind_columns variables when skip_empty_rows skips an empty line in getline.

With bind_columns, the parser writes each field into the caller's own scalar without taking a reference to it. When skip_empty_rows skips an empty last line, the parser frees the current field scalar without checking whether it is bound, dropping one reference from the application's variable. The "eof" mode does the same on any empty line.

The variable is then freed while the application still references it, so later code uses freed memory and can crash the process.