Detections
Analytics
Linux Distros Unpatched Vulnerability : CVE-2026-93599
high Nessus Plugin ID 348652
Language:
Synopsis
The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.Description
The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.- rustls-webpki through 0.103.12 (and 0.104.0-alpha releases before 0.104.0-alpha.7) contains a reachable panic in bit_string_flags() in src/der.rs. The input guard fails to reject a named-bit BIT STRING whose content is exactly [0x00] (zero padding bits and no data bytes), so raw_bits.len() - 1 underflows on the empty slice and the subsequent index operation panics (subtract-with-overflow in debug, index-out-of- bounds in release). The condition is reachable through the public API BorrowedCertRevocationList::from_der() when a CRL contains an issuingDistributionPoint extension with such an onlySomeReasons value. Exploitation requires an application that explicitly opts in to CRL revocation checking by passing RevocationOptions to verify_for_usage() and that parses CRL bytes obtained from a source the attacker can influence; the default rustls configuration, which does not use RevocationOptions, is unaffected. A crafted CRL causes a denial of service via the panic. Fixed in 0.103.13 and 0.104.0-alpha.7. (CVE-2026-93599)
Note that Nessus relies on the presence of the package as reported by the vendor.
Solution
There is no known solution at this time.See Also
https://access.redhat.com/security/cve/cve-2026-93599
Plugin Details
Severity: High
ID: 348652
File Name: unpatched_CVE_2026_93599.nasl
Version: 1.7
Type: Local
Agent: unix
Family: Misc.
Published: 9/21/2026
Updated: 9/29/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.66
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 6.6
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2026-93599
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.9
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C
CVSS v4
Risk Factor: High
Base Score: 8.7
Threat Score: 6.6
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Vulnerability Information
CPE: cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:7, cpe:/o:centos:centos:8, cpe:/o:debian:debian_linux:13.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:rust-rustls-webpki, p-cpe:/a:centos:centos:clevis-pin-trustee, p-cpe:/a:centos:centos:coreos-installer-bootinfra, p-cpe:/a:centos:centos:coreos-installer-dracut, p-cpe:/a:centos:centos:coreos-installer, p-cpe:/a:centos:centos:firefox-x11, p-cpe:/a:centos:centos:firefox, p-cpe:/a:centos:centos:glx-utils, p-cpe:/a:centos:centos:goose, p-cpe:/a:centos:centos:mesa-demos, p-cpe:/a:centos:centos:mesa-dri-drivers, p-cpe:/a:centos:centos:mesa-filesystem, p-cpe:/a:centos:centos:mesa-libegl-devel, p-cpe:/a:centos:centos:mesa-libegl, p-cpe:/a:centos:centos:mesa-libgbm-devel, p-cpe:/a:centos:centos:mesa-libgbm, p-cpe:/a:centos:centos:mesa-libgl-devel, p-cpe:/a:centos:centos:mesa-libgl, p-cpe:/a:centos:centos:mesa-libglapi, p-cpe:/a:centos:centos:mesa-libglu-devel, p-cpe:/a:centos:centos:mesa-libglu, p-cpe:/a:centos:centos:mesa-libosmesa-devel, p-cpe:/a:centos:centos:mesa-libosmesa, p-cpe:/a:centos:centos:mesa-libxatracker, p-cpe:/a:centos:centos:mesa-vulkan-drivers, p-cpe:/a:centos:centos:rpm-ostree-devel, p-cpe:/a:centos:centos:rpm-ostree-libs, p-cpe:/a:centos:centos:rpm-ostree, p-cpe:/a:centos:centos:rust-sequoia-sq, p-cpe:/a:centos:centos:sequoia-sq, p-cpe:/a:centos:centos:thunderbird, p-cpe:/a:centos:centos:trustee-kbs, p-cpe:/a:debian:debian_linux:rust-rustls-webpki, p-cpe:/a:redhat:enterprise_linux:clevis-pin-trustee, p-cpe:/a:redhat:enterprise_linux:coreos-installer-bootinfra, p-cpe:/a:redhat:enterprise_linux:coreos-installer-dracut, p-cpe:/a:redhat:enterprise_linux:coreos-installer, p-cpe:/a:redhat:enterprise_linux:firefox-x11, p-cpe:/a:redhat:enterprise_linux:firefox, p-cpe:/a:redhat:enterprise_linux:glx-utils, p-cpe:/a:redhat:enterprise_linux:goose, p-cpe:/a:redhat:enterprise_linux:mesa-demos, p-cpe:/a:redhat:enterprise_linux:mesa-dri-drivers, p-cpe:/a:redhat:enterprise_linux:mesa-filesystem, p-cpe:/a:redhat:enterprise_linux:mesa-libegl-devel, p-cpe:/a:redhat:enterprise_linux:mesa-libegl, p-cpe:/a:redhat:enterprise_linux:mesa-libgbm-devel, p-cpe:/a:redhat:enterprise_linux:mesa-libgbm, p-cpe:/a:redhat:enterprise_linux:mesa-libgl-devel, p-cpe:/a:redhat:enterprise_linux:mesa-libgl, p-cpe:/a:redhat:enterprise_linux:mesa-libglapi, p-cpe:/a:redhat:enterprise_linux:mesa-libglu-devel, p-cpe:/a:redhat:enterprise_linux:mesa-libglu, p-cpe:/a:redhat:enterprise_linux:mesa-libosmesa-devel, p-cpe:/a:redhat:enterprise_linux:mesa-libosmesa, p-cpe:/a:redhat:enterprise_linux:mesa-libxatracker, p-cpe:/a:redhat:enterprise_linux:mesa-vulkan-drivers, p-cpe:/a:redhat:enterprise_linux:rpm-ostree-devel, p-cpe:/a:redhat:enterprise_linux:rpm-ostree-libs, p-cpe:/a:redhat:enterprise_linux:rpm-ostree, p-cpe:/a:redhat:enterprise_linux:rust-sequoia-sq, p-cpe:/a:redhat:enterprise_linux:sequoia-sq, p-cpe:/a:redhat:enterprise_linux:thunderbird, p-cpe:/a:redhat:enterprise_linux:trustee-kbs
Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 9/18/2026
Reference Information
CVE: CVE-2026-93599