Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during raw IPv6 scans.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-602d919dbc advisory.

    - Fix CVE-2026-58058 (rhbz#2494410)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-3b30fa1da4 advisory.

    - Fix CVE-2026-58058 (rhbz#2494410)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 45 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-0245fd9f84 advisory.

    Automatic update for nmap-7.92-11.fc45.

    ##### **Changelog**

    ```
    * Tue Jun 30 2026 Martin Osvald <mosvald@redhat.com> - 4:7.92-11
    - Fix CVE-2026-58058 (rhbz#2494410)

    ```

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

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

  - Nmap through 7.99 does not keep the IPv6 extension-header walk within the captured packet in     ipv6_get_data_primitive (libnetutil/netutil.cc), so the pointer advances past the buffer and the     remaining-length computation underflows to a large value. A scanned target or on-path attacker returning a     crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads and a crash during     raw IPv6 scans. (CVE-2026-58058)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
326230	Fedora 43 : nmap (2026-602d919dbc)	Nessus	Fedora Local Security Checks	medium
324927	Fedora 44 : nmap (2026-3b30fa1da4)	Nessus	Fedora Local Security Checks	medium
324742	Fedora 45 : nmap (2026-0245fd9f84)	Nessus	Fedora Local Security Checks	medium
323536	Linux Distros Unpatched Vulnerability : CVE-2026-58058	Nessus	Misc.	medium

Detections

Analytics

CVE-2026-58058

medium

Tenable Plugins

medium

medium

medium

medium