CVE-2026-35535 Privilege escalation in Sudo
High 7.4
Published
Updated
Check this codebase for CVE-2026-35535 and fix it if it is affected.
What it is: CVE-2026-35535 is a high-severity vulnerability in Sudo, published on 3 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-35535 in the wild and no public exploit code.
Affected product: Sudo. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-35535/ (Markdown: https://insights.sbomify.com/CVE-2026-35535/index.md)
Attackers can escalate privileges if setuid or setgid calls fail during mailer execution in Sudo before the fix.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-35535?
CVE-2026-35535 is a high-severity vulnerability in Sudo, published on 3 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-35535?
It affects 2 products.
Linux distribution packages (40)
sudo AlmaLinux:10 | All versions | 1.9.15-10.p5.el10_1 |
sudo AlmaLinux:10 | All versions | 1.9.17-4.p2.el10_2 |
sudo-python-plugin AlmaLinux:10 | All versions | 1.9.15-10.p5.el10_1 |
sudo-python-plugin AlmaLinux:10 | All versions | 1.9.17-4.p2.el10_2 |
sudo AlmaLinux:8 | All versions | 1.9.5p2-1.el8_10.5 |
sudo AlmaLinux:9 | All versions | 1.9.17p2-3.el9_8 |
sudo AlmaLinux:9 | All versions | 1.9.5p2-15.el9_7 |
sudo-python-plugin AlmaLinux:9 | All versions | 1.9.17p2-3.el9_8 |
sudo-python-plugin AlmaLinux:9 | All versions | 1.9.5p2-15.el9_7 |
sudo Red Hat:enterprise_linux:10.1 | All versions | 0:1.9.15-10.p5.el10_1 |
sudo-debuginfo Red Hat:enterprise_linux:10.1 | All versions | 0:1.9.15-10.p5.el10_1 |
sudo-debugsource Red Hat:enterprise_linux:10.1 | All versions | 0:1.9.15-10.p5.el10_1 |
sudo-python-plugin Red Hat:enterprise_linux:10.1 | All versions | 0:1.9.15-10.p5.el10_1 |
sudo-python-plugin-debuginfo Red Hat:enterprise_linux:10.1 | All versions | 0:1.9.15-10.p5.el10_1 |
sudo Red Hat:enterprise_linux:10.2 | All versions | 0:1.9.17-4.p2.el10_2 |
sudo-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:1.9.17-4.p2.el10_2 |
sudo-debugsource Red Hat:enterprise_linux:10.2 | All versions | 0:1.9.17-4.p2.el10_2 |
sudo-python-plugin Red Hat:enterprise_linux:10.2 | All versions | 0:1.9.17-4.p2.el10_2 |
sudo-python-plugin-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:1.9.17-4.p2.el10_2 |
sudo Red Hat:enterprise_linux:8::baseos | All versions | 0:1.9.5p2-1.el8_10.5 |
sudo-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:1.9.5p2-1.el8_10.5 |
sudo-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:1.9.5p2-1.el8_10.5 |
sudo-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:1.9.17p2-3.el9_8 |
sudo-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:1.9.5p2-15.el9_7 |
sudo-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 0:1.9.17p2-3.el9_8 |
sudo-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 0:1.9.5p2-15.el9_7 |
sudo-python-plugin Red Hat:enterprise_linux:9::appstream | All versions | 0:1.9.17p2-3.el9_8 |
sudo-python-plugin Red Hat:enterprise_linux:9::appstream | All versions | 0:1.9.5p2-15.el9_7 |
sudo-python-plugin-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:1.9.17p2-3.el9_8 |
sudo-python-plugin-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:1.9.5p2-15.el9_7 |
sudo Red Hat:enterprise_linux:9::baseos | All versions | 0:1.9.17p2-3.el9_8 |
sudo Red Hat:enterprise_linux:9::baseos | All versions | 0:1.9.5p2-15.el9_7 |
sudo-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:1.9.17p2-3.el9_8 |
sudo-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:1.9.5p2-15.el9_7 |
sudo-debugsource Red Hat:enterprise_linux:9::baseos | All versions | 0:1.9.17p2-3.el9_8 |
sudo-debugsource Red Hat:enterprise_linux:9::baseos | All versions | 0:1.9.5p2-15.el9_7 |
sudo-python-plugin-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:1.9.17p2-3.el9_8 |
sudo-python-plugin-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:1.9.5p2-15.el9_7 |
sudo Red Hat:enterprise_linux_eus:10.0 | All versions | 0:1.9.15-8.p5.el10_0.3 |
sudo-debuginfo Red Hat:enterprise_linux_eus:10.0 | All versions | 0:1.9.15-8.p5.el10_0.3 |
Products include Siemens Sinec Os, Sudo Project Sudo.
How do I fix CVE-2026-35535?
Apply the vendor's patch.
Is CVE-2026-35535 being exploited?
There is no known exploitation of CVE-2026-35535 in the wild and no public exploit code.
Sources
Also known as ALSA-2026:10758, ALSA-2026:11521, ALSA-2026:12310, ALSA-2026:19067, ALSA-2026:19220, AZL-81861 and 49 more.