EUVD-2026-33818
GHSA-9m6p-w8rp-5v54
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from Vendor (VulDB) · only source for this CVE.
CVSS VectorVendor: VulDB
Lifecycle Timeline
3DescriptionCVE.org
A vulnerability has been found in PackageKit up to 1.3.5. Affected is the function g_file_test of the file src/pk-transaction.c of the component API. Such manipulation of the argument frontend-socket leads to improper authorization. The attack can be executed remotely. The exploit has been disclosed to the public and may be used.
AnalysisAI
Improper authorization in PackageKit up to 1.3.5 allows a low-privileged authenticated remote attacker to bypass access controls via manipulation of the frontend-socket argument in the g_file_test function within pk-transaction.c, resulting in unauthorized confidentiality exposure (C:L). The vulnerability is tagged as an authentication bypass and publicly available exploit code exists, disclosed via GitHub issue #969 against the PackageKit project. No CISA KEV listing is present, but the combination of a publicly known proof-of-concept and low attack complexity (AC:L) elevates practical risk beyond what the base CVSS score of 4.3 alone suggests.
Technical ContextAI
PackageKit is a Linux system service that abstracts package management operations across distributions via a D-Bus API, enabling frontend applications to install, remove, and query packages without direct root interaction. The vulnerable code resides in src/pk-transaction.c, which handles the lifecycle of package management transactions. The g_file_test() function - a GLib utility for file existence and property checks - is called against an attacker-influenced frontend-socket argument, and the authorization logic gating that check can be bypassed. CWE-285 (Improper Authorization) identifies the root cause as a failure to correctly enforce access controls, specifically when evaluating whether a caller is permitted to interact with a given socket path. The CPE string (cpe:2.3:a:n/a:packagekit:*:*:*:*:*:*:*:*) confirms all PackageKit application variants through version 1.3.5 are in scope, though the vendor/namespace field is unresolved (n/a), suggesting NVD CPE assignment is incomplete.
RemediationAI
No vendor-released patched version was identified at time of analysis; the upstream fix status should be tracked via the GitHub issue at https://github.com/PackageKit/PackageKit/issues/969, which serves as the primary POC and potential fix discussion thread. As a compensating control, restrict access to the PackageKit D-Bus API by tightening PolicyKit (polkit) rules to limit which users or processes may initiate transactions, reducing the pool of PR:L authenticated callers who could reach the vulnerable code path. Disabling or firewalling remote D-Bus exposure (if applicable to the deployment) would reduce the AV:N attack surface. Monitoring PackageKit transaction logs for anomalous frontend-socket arguments is an additional detective control. Note that restricting polkit rules may break legitimate package management workflows for non-root users; test in a staging environment before deploying broadly. Reference the VulDB entry at https://vuldb.com/vuln/367587 for updated patch status.
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Same weakness CWE-285 – Improper Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today