The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. A     polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and subsequent     denial of service. This CVE covers quadratic complexity issues when parsing text which leads with either     large numbers of `_` characters. This issue has been addressed in version 0.29.0.gfm.10. Users are advised     to upgrade. Users unable to upgrade should validate that their input comes from trusted sources. ###     Impact A polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and     subsequent denial of service. ### Proof of concept ``` $ ~/cmark-gfm$ python3 -c 'pad = _ * 100000;
    print(pad + . + pad, end=)' | time ./build/src/cmark-gfm --to plaintext ``` Increasing the number     10000 in the above commands causes the running time to increase quadratically. ### Patches This     vulnerability have been patched in 0.29.0.gfm.10. ### Note on cmark and cmark-gfm XXX: TBD [cmark-     gfm](https://github.com/github/cmark-gfm) is a fork of [cmark](https://github.com/commonmark/cmark) that     adds the GitHub Flavored Markdown extensions. The two codebases have diverged over time, but share a     common core. These bugs affect both `cmark` and `cmark-gfm`. ### Credit We would like to thank @gravypod     for reporting this vulnerability. ### References https://en.wikipedia.org/wiki/Time_complexity ### For     more information If you have any questions or comments about this advisory: * Open an issue in     [github/cmark-gfm](https://github.com/github/cmark-gfm) (CVE-2023-26485)

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Detections

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Linux Distros Unpatched Vulnerability : CVE-2023-26485

high Nessus Plugin ID 257262

Version 1.4

Version 1.2

Version 1.1

Version 1.4 Oct 28, 2025, 9:02 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202510280902
Version 1.2 Sep 3, 2025, 6:28 AM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin Feed: 202509030628
Version 1.1 Aug 28, 2025, 1:38 AM New Plugin Feed: 202508280138