CVE-2026-46300 (Fragnesia) is a Linux kernel privilege escalation in the XFRM ESP-in-TCP subsystem. Public PoC, no race condition. Dirty Frag patches do not fix it.

CVE-2026-46300 (Fragnesia): Linux Kernel ESP-in-TCP LPE FAQ | Tenable®

Debian Linux - linux - None

Red Hat Enterprise Linux - kernel: "Fragnesia" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local Privilege Escalation (LPE) vulnerability in the Linux kernel

Ubuntu Linux - Fragnesia linux kernel local privilege escalation issue

Fragnesia is a new Linux Kernel elevation of privilege vulnerability in the Dirty Frag vulnerability class. Patches should be applied as soon as possible.

The remote Fedora 42 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-ec1c523fdb advisory.

    The 6.19.14-102 stable kernel update contains a fix for the Fragnesia CVE-2026-46300.

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 packages installed that are affected by a vulnerability as referenced in the FEDORA-2026-4462efc052 advisory.

    The 7.0.6 stable kernel update contains a number of important fixes across the tree. It also contains a     fix for the Fragnesia CVE-2026-46300

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 43 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2026-cccb681166 advisory.

    The 7.0.6 stable kernel update contains a number of important fixes across the tree. It also contains a     fix for the Fragnesia CVE-2026-46300

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.

  - The 6.19.14-102 stable kernel update contains a fix for the Fragnesia CVE-2026-46300. (CVE-2026-46300)

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

ID	Name	Product	Family	Severity
314601	Fedora 42 : kernel (2026-ec1c523fdb)	Nessus	Fedora Local Security Checks	high
314533	Fedora 44 : kernel / kernel-headers (2026-4462efc052)	Nessus	Fedora Local Security Checks	high
314531	Fedora 43 : kernel / kernel-headers (2026-cccb681166)	Nessus	Fedora Local Security Checks	high
314469	Linux Distros Unpatched Vulnerability : CVE-2026-46300	Nessus	Misc.	high

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CVE-2026-46300

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