--- id: CVE-2026-35535 title: >- 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. summary: >- 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. severity: high cvss: 7.4 cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H' cwe: - CWE-271 - CWE-272 vendor: sudo_project product: sudo affected: - sudo < 1.9.17 - sudo = 1.9.17 - sinec_os < 4.0 patched: - sudo 1.9.17 - sinec_os 4.0 published: '2026-04-03' updated: '2026-07-02' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-35535' references: - url: 'https://bugs.debian.org/1130593' label: cve@mitre.org - url: 'https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/2143042' label: cve@mitre.org - url: >- https://github.com/sudo-project/sudo/commit/3e474c2f201484be83d994ae10a4e20e8c81bb69 label: cve@mitre.org - url: 'https://www.qualys.com/2026/03/10/crack-armor.txt' label: cve@mitre.org - url: 'https://lists.debian.org/debian-lts-announce/2026/06/msg00003.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2026:10758' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:11521' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:12310' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13731' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13888' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13889' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13891' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13892' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13895' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13896' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:14228' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:14437' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:19067' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:19220' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:20040' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:20087' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:21275' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:21656' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:21690' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:21695' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:23233' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:28887' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:30088' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/security/cve/CVE-2026-35535' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2454714' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://cert-portal.siemens.com/productcert/html/ssa-253495.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35535.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://www.cve.org/CVERecord?id=CVE-2026-35535' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-35535' - url: 'https://access.redhat.com/errata/RHSA-2026:34098' tags: - nvd - csaf - vex - red-hat epss: 0.00173 epssPercentile: 0.07083 ingestedAt: '2026-07-02T12:34:40.461Z' --- ## Overview 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. ## Affected - `sudo < 1.9.17` - `sudo = 1.9.17` - `sinec_os < 4.0` ## Remediation Upgrade past the affected range: - `sudo 1.9.17` - `sinec_os 4.0` ## Vendor advisories - **RHSA-2026:13896** · Red Hat · fixed in: Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION), Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION) · released 2026-05-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:13896) - **RHSA-2026:13895** · Red Hat · fixed in: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS) · released 2026-05-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:13895) - **RHSA-2026:21695** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.12 · released 2026-06-04 · [advisory](https://access.redhat.com/errata/RHSA-2026:21695) - **RHSA-2026:21690** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.13 · released 2026-06-04 · [advisory](https://access.redhat.com/errata/RHSA-2026:21690) - **RHSA-2026:28887** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.14 · released 2026-07-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:28887) - **RHSA-2026:23233** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.15 · released 2026-06-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:23233) - **RHSA-2026:20087** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.16 · released 2026-05-29 · [advisory](https://access.redhat.com/errata/RHSA-2026:20087) - **RHSA-2026:34098** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.17 · released 2026-07-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:34098) - **RHSA-2026:21656** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.18 · released 2026-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:21656) - **RHSA-2026:20040** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.19 · released 2026-05-27 · [advisory](https://access.redhat.com/errata/RHSA-2026:20040) - **RHSA-2026:13888** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0) · released 2026-05-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:13888) - **Red Hat VEX** · Important · affected: Red Hat Hardened Images, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Hardened Images, Red Hat OpenShift Container Platform 4 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35535.json)