CVE-2026-35535
Sudo Privilege Escalation Vulnerability
Description
In Sudo through 1.9.17p2 before 3e474c2, a failure of a setuid, setgid, or setgroups call, during a privilege drop before running the mailer, is not a fatal error and can lead to privilege escalation.
INFO
Published Date :
April 3, 2026, 3:16 a.m.
Last Modified :
June 4, 2026, 4:16 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-35535
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Sudo to a version later than 1.9.17p2.
- Apply the patch 3e474c2 to Sudo.
- Ensure all setuid, setgid, and setgroups calls succeed.
Public PoC/Exploit Available at Github
CVE-2026-35535 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-35535.
| URL | Resource |
|---|---|
| https://bugs.debian.org/1130593 | Broken Link |
| https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/2143042 | Issue Tracking |
| https://github.com/sudo-project/sudo/commit/3e474c2f201484be83d994ae10a4e20e8c81bb69 | Patch |
| https://www.qualys.com/2026/03/10/crack-armor.txt | Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2026/06/msg00003.html | |
| https://cert-portal.siemens.com/productcert/html/ssa-253495.html | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-35535 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-35535
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Read-only Linux host checker for supply-chain incident response, including vulnerable kernel posture, risky module state, and known developer-tooling persistence indicators
JavaScript PowerShell
security scan and patch for linux system
Shell
DSA and DLA for Debian last 14 days
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-35535 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-35535 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jun. 04, 2026
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2026/06/msg00003.html -
Reanalysis by [email protected]
Jun. 02, 2026
Action Type Old Value New Value Changed CPE Configuration AND OR *cpe:2.3:o:siemens:ruggedcom_rst2428p_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0 OR cpe:2.3:h:siemens:ruggedcom_rst2428p:-:*:*:*:*:*:*:* AND OR *cpe:2.3:o:siemens:sinec_os:*:*:*:*:*:*:*:* versions up to (excluding) 4.0 OR cpe:2.3:h:siemens:ruggedcom_rst2428p:-:*:*:*:*:*:*:* -
Initial Analysis by [email protected]
Jun. 02, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:* versions up to (excluding) 1.9.17 *cpe:2.3:a:sudo_project:sudo:1.9.17:-:*:*:*:*:*:* *cpe:2.3:a:sudo_project:sudo:1.9.17:p1:*:*:*:*:*:* *cpe:2.3:a:sudo_project:sudo:1.9.17:p2:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:ruggedcom_rst2428p_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 4.0 OR cpe:2.3:h:siemens:ruggedcom_rst2428p:-:*:*:*:*:*:*:* Added Reference Type MITRE: https://bugs.debian.org/1130593 Types: Broken Link Added Reference Type MITRE: https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/2143042 Types: Issue Tracking Added Reference Type siemens-SADP: https://cert-portal.siemens.com/productcert/html/ssa-253495.html Types: Third Party Advisory Added Reference Type MITRE: https://github.com/sudo-project/sudo/commit/3e474c2f201484be83d994ae10a4e20e8c81bb69 Types: Patch Added Reference Type MITRE: https://www.qualys.com/2026/03/10/crack-armor.txt Types: Third Party Advisory -
CVE Modified by 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Jun. 02, 2026
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/html/ssa-253495.html -
New CVE Received by [email protected]
Apr. 03, 2026
Action Type Old Value New Value Added Description In Sudo through 1.9.17p2 before 3e474c2, a failure of a setuid, setgid, or setgroups call, during a privilege drop before running the mailer, is not a fatal error and can lead to privilege escalation. Added CVSS V3.1 AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-271 Added Reference https://bugs.debian.org/1130593 Added Reference https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/2143042 Added Reference https://github.com/sudo-project/sudo/commit/3e474c2f201484be83d994ae10a4e20e8c81bb69 Added Reference https://www.qualys.com/2026/03/10/crack-armor.txt