# CVE-2026-110755: libtext-csv-xs-perl: Text::CSV_XS versions before 1.65 for Perl allow quadratic CPU use by copying the unparsed remainder per record of CR...

CVE-2026-110755 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-110755, released October 20, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-110755
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0041
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 15, 2026

## Description

Text::CSV_XS versions before 1.65 for Perl allow quadratic CPU use by copying the unparsed remainder per record of CR-only input in getline.  With eol unset, the default, getline reads with Perl's default line separator, so input with CR-only line endings arrives as one chunk. After each record the parser copies the whole unparsed remainder into a new buffer, which the next call parses and copies again, so the work grows with the square of the input size.  A reader with default options that is sent CSV with classic Mac line endings spends seconds of CPU time on a megabyte of input.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libtext-csv-xs-perl Debian 14 | 1.65-1 | [DEBIAN-CVE-2026-110755](https://patchblox.com/security/data/fix/linux/debian-cve-2026-110755.md) | Oct 20, 2026 |
| Linux | perl-Text-CSV_XS Fedora 43 | 1.65-1.fc43 | [FEDORA-2026-39D5C46C12](https://patchblox.com/security/data/fix/linux/fedora-2026-39d5c46c12.md) | Nov 7, 2026 |
| Linux | perl-Text-CSV_XS amzn 2023 | 1.65-1.amzn2023.0.1 | [ALAS2023-2026-3340](https://patchblox.com/security/data/fix/linux/alas2023-2026-3340.md) | Nov 7, 2026 |
| Linux | perl-Text-CSV_XS sles 15.6 | 1.34-150000.3.6.1 | [SUSE-SU-2026:5120-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5120-1.md) | Nov 7, 2026 |
| Linux | perl-Text-CSV_XS sles 15.7 | 1.34-150000.3.6.1 | [SUSE-SU-2026:5120-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5120-1.md) | Nov 7, 2026 |
| Linux | perl-Text-CSV_XS-debuginfo Fedora 43 | 1.65-1.fc43 | [FEDORA-2026-39D5C46C12](https://patchblox.com/security/data/fix/linux/fedora-2026-39d5c46c12.md) | Nov 7, 2026 |
| Linux | perl-Text-CSV_XS-debuginfo amzn 2023 | 1.65-1.amzn2023.0.1 | [ALAS2023-2026-3340](https://patchblox.com/security/data/fix/linux/alas2023-2026-3340.md) | Nov 7, 2026 |
| Linux | perl-Text-CSV_XS-debugsource Fedora 43 | 1.65-1.fc43 | [FEDORA-2026-39D5C46C12](https://patchblox.com/security/data/fix/linux/fedora-2026-39d5c46c12.md) | Nov 7, 2026 |
| Linux | perl-Text-CSV_XS-debugsource amzn 2023 | 1.65-1.amzn2023.0.1 | [ALAS2023-2026-3340](https://patchblox.com/security/data/fix/linux/alas2023-2026-3340.md) | Nov 7, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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