SUSE SLED15: flatpak / flatpak-devel / flatpak-remote-flathub / etc (SUSE-SU-2026:4944-1)

high Nessus Plugin ID 374780

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4944-1 advisory.

- CVE-2026-90616: missing symlink protection allows a malicious sandboxed app to obtain arbitrary read and write access to files on the host (bsc#1280236).
- CVE-2026-92162: path traversal via unvalidated `arch` parameter in `DeployAppstream` (bsc#1282514).
- CVE-2026-96275: arbitrary write access as root via extra-data extraction (bsc#1282515).
- CVE-2026-96276: arbitrary write in host context via `flatpak build-init` (bsc#1282516).
- CVE-2026-96280: buffer overflow in OCI delta stream path names (bsc#1282518).
- CVE-2026-96281: unprivileged active user can bypass anti-downgrade checks for system apps/runtimes (bsc#1282519).
- CVE-2026-96282: extension metadata path traversal file existence oracle (bsc#1282520).
- CVE-2026-96807: fixed-filename writes to arbitrary locations via symlink attack on `.ld.so` (bsc#1282523).
- CVE-2026-96808: `revokefs` symlink path traversal allows local privilege escalation via commit tampering (bsc#1282524).

Changes for flatpak:

- Update to version 1.16.6 (jsc#PED-17048):
+ Fix file descriptor leaks affecting Chromium-based browsers.
+ Fix installing extra-data without a runtime, including openh264.
+ Fix unusable sandbox-expose paths affecting Epiphany.
+ Fix installed tests and handling of file descriptor arguments.
- Changes from version 1.16.5:
+ Fix regressions from the sandbox escape security fix affecting browsers, browser-based apps and Steam.
+ Expand test coverage of flatpak-run features used by the portal.
- Changes from version 1.16.4:
+ Prevent arbitrary file reads in the system-helper context (GHSA-2fxp-43j9-pwvc).
+ Prevent orphaning cross-user pull operations (GHSA-89xm-3m96-w3jg).
- Changes from version 1.16.3:
+ Be selective about mapping font-dirs.xml in flatpak build.
- Changes from version 1.16.2:
+ Support reinstalling bundle installations and Intel Xe VA-API.
+ Add cancellation support for curl downloads.
+ Fix font configuration, mask and pin configuration reloads, unintended home directory access, flatpak kill, OCI support, memory leaks and crashes.
- Changes from version 1.16.1:
+ Allow updating existing apps under parental controls by default.
+ Use instance IDs for systemd scopes and include /dev/udmabuf with --device=dri.
+ Speed up prune --dry-run and permission-reset.
+ Support TLS certificates in /etc/containers/certs.d for OCI.
+ Fix portal crashes, sandbox environment handling, accessibility bus discovery, error reporting and shell completion.
+ Update documentation and translations.

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

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

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 374780

File Name: suse_SU-2026-4944-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 11/1/2026

Updated: 11/1/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

Percentile: 96.5

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-96275

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS Score Source: CVE-2026-96276

CVSS v4

Risk Factor: High

Base Score: 7.2

Threat Score: 6.3

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-92162

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:flatpak-devel, p-cpe:/a:novell:suse_linux:flatpak-remote-flathub, p-cpe:/a:novell:suse_linux:flatpak-zsh-completion, p-cpe:/a:novell:suse_linux:flatpak, p-cpe:/a:novell:suse_linux:libflatpak0, p-cpe:/a:novell:suse_linux:system-user-flatpak, p-cpe:/a:novell:suse_linux:typelib-1_0-flatpak-1_0

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/29/2026

Vulnerability Publication Date: 9/12/2026

Reference Information

CVE: CVE-2026-90616, CVE-2026-92162, CVE-2026-96275, CVE-2026-96276, CVE-2026-96280, CVE-2026-96281, CVE-2026-96282, CVE-2026-96807, CVE-2026-96808

IAVA: 2026-A-0990

SuSE: SUSE-SU-2026:4944-1

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