{"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":0.07089,"ingestedAt":"2026-07-02T12:34:40.461Z","slug":"CVE-2026-35535","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `sudo < 1.9.17`\n- `sudo = 1.9.17`\n- `sinec_os < 4.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `sudo 1.9.17`\n- `sinec_os 4.0`\n\n## Vendor advisories\n\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)\n- **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)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}