During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.

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

  - During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason     `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.
    (CVE-2026-92392)

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

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 14dab969-c797-11f1-a6ea-8447094a420f advisory.

    The Curl project reports:

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

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

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6558 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6558-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     October 14, 2026                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : curl     CVE ID         : CVE-2026-92392

    It was discovered that the cURL URL transfer library, is prone to a     use-after-free vulnerability when handling a HTTP/2 RST_STREAM received     by a server during an upload, which could result in remote code     execution.

    For the stable distribution (trixie), this problem has been fixed in     version 8.14.1-2+deb13u7. The update additionally contains fixes for     CVE-2026-8286, CVE-2026-8924 and CVE-2026-8927 which were planned to be     released with the trixie 13.8 point release.

    We recommend that you upgrade your curl packages.

    For the detailed security status of curl please refer to its security     tracker page at:
    https://security-tracker.debian.org/tracker/curl

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

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

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

ID	Name	Product	Family	Type	Severity
365707	Linux Distros Unpatched Vulnerability : CVE-2026-92392	Nessus	Misc.	Local	critical
365567	FreeBSD : Curl -- Multiple vulnerabilities (14dab969-c797-11f1-a6ea-8447094a420f)	Nessus	FreeBSD Local Security Checks	Local	critical
365528	Debian dsa-6558 : curl - security update	Nessus	Debian Local Security Checks	Local	critical

Detections

Analytics

CVE-2026-92392

high

Tenable Plugins

critical

critical

critical