Risk Scores
CVSS v3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian | policykit-1 |
Timeline
- Apr 30, 2026 CVE Published
=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4420 policykit-1 security update 30 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: policykit-1 Publisher: Debian Operating System: Debian GNU/Linux Resolution: Patch/Upgrade CVE Names: CVE-2021-4115 CVE-2026-4897 Original Bulletin: https://lists.debian.org/debian-lts-announce/2026/04/msg00034.html Comment: CVSS (Max): 5.5 CVE-2026-4897 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) CVSS Source: [Red Hat], NIST Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H EPSS (Max): 0.1% (28th) CVE-2021-4115 2026-04-29 - --------------------------BEGIN INCLUDED TEXT-------------------- ------------------------------------------------------------------------- Debian LTS Advisory DLA-4553-1 debian-lts@lists.debian.org https://www.debian.org/lts/security/ Andreas Henriksson April 29, 2026 https://wiki.debian.org/LTS ------------------------------------------------------------------------- Package : policykit-1 Version : 0.105-31+deb11u2 CVE ID : CVE-2021-4115 CVE-2026-4897 Debian Bug : 1005784 1132234 Multiple vulnerabilities where identified in polkit, a toolkit for defining and handling the policy that allows unprivileged processes to speak to privileged processes. CVE-2021-4115 Kevin Backhouse of GitHub Security Lab (GHSL) found that there is a file descriptor leak in polkit, which can enable an unprivileged user to cause polkit to crash, due to file descriptor exhaustion. This could lead to currently ongoing authentication attempts to fail to authenticate resulting in a Denial of Service (DoS). CVE-2026-4897 Pavel Kohout, Aisle Research found that a local user provide a specially crafted, excessively long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system. For Debian 11 bullseye, these problems have been fixed in version 0.105-31+deb11u2. We recommend that you upgrade your policykit-1 packages. For the detailed security status of policykit-1 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/policykit-1 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================
| Vendor | Product | Versions |
|---|---|---|
| Debian | policykit-1 |