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.

According to the versions of the nmap packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    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)

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

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1788629925 advisory.

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

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1788628939 advisory.

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

The AlmaLinux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1788628939 advisory.

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

The remote SUSE Linux SLES12 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2026:3333-1 advisory.

    This update for nmap fixes the following issue

    - CVE-2026-58058: crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads     and a crash (bsc#1269570).

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:3340-1 advisory.

    This update for nmap fixes the following issue:

    - CVE-2026-58058: crafted IPv6 response with a truncated extension header can trigger out-of-bounds reads     and a crash       (bsc#1269570).

Tenable has extracted the preceding description block directly from the SUSE 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 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	Type	Severity
364957	EulerOS 2.0 SP11 : nmap (EulerOS-SA-2026-4349)	Nessus	Huawei Local Security Checks	Local	medium
364800	EulerOS 2.0 SP11 : nmap (EulerOS-SA-2026-4259)	Nessus	Huawei Local Security Checks	Local	medium
474207	Chainguard: multiple nmap packages: security update to 7.991-r0	Tenable Cloud Security	Chainguard Local Security Checks	Local	medium
474207	Chainguard: multiple nmap packages: security update to 7.991-r0	Tenable Self-Hosted Container Security	Chainguard Local Security Checks	Local	medium
460968	Echo: nmap: security update to 7.95+dfsg-3+e1	Tenable Cloud Security	Echo Local Security Checks	Local	medium
460968	Echo: nmap: security update to 7.95+dfsg-3+e1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
360187	AlmaLinux 9.2 [TuxCare] Security Update: nmap / nmap-ncat (ALMALINUX9.2:CLSA-2026:1788629925)	Nessus	Alma Linux Local Security Checks	Local	medium
352569	Rocky Linux 9.6 [TuxCare] Security Update: nmap / nmap-ncat (ALMALINUX9.6:CLSA-2026:1788628939)	Nessus	Rocky Linux Local Security Checks	Local	medium
352348	AlmaLinux 9.6 [TuxCare] Security Update: nmap / nmap-ncat (ALMALINUX9.6:CLSA-2026:1788628939)	Nessus	Alma Linux Local Security Checks	Local	medium
348002	EulerOS 2.0 SP10 : nmap (EulerOS-SA-2026-3708)	Nessus	Huawei Local Security Checks	Local	medium
347110	EulerOS 2.0 SP10 : nmap (EulerOS-SA-2026-3755)	Nessus	Huawei Local Security Checks	Local	medium
343706	EulerOS 2.0 SP12 : nmap (EulerOS-SA-2026-3287)	Nessus	Huawei Local Security Checks	Local	medium
343615	EulerOS 2.0 SP12 : nmap (EulerOS-SA-2026-3362)	Nessus	Huawei Local Security Checks	Local	medium
330555	SUSE SLES12 Security Update : nmap (SUSE-SU-2026:3333-1)	Nessus	SuSE Local Security Checks	Local	medium
330543	SUSE SLED15 / SLES15 Security Update : nmap (SUSE-SU-2026:3340-1)	Nessus	SuSE Local Security Checks	Local	medium
326230	Fedora 43 : nmap (2026-602d919dbc)	Nessus	Fedora Local Security Checks	Local	medium
324927	Fedora 44 : nmap (2026-3b30fa1da4)	Nessus	Fedora Local Security Checks	Local	medium
324742	Fedora 45 : nmap (2026-0245fd9f84)	Nessus	Fedora Local Security Checks	Local	medium
323536	Linux Distros Unpatched Vulnerability : CVE-2026-58058	Nessus	Misc.	Local	medium

Detections

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CVE-2026-58058

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