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This backport is provided thanks to the Debian community [1].
- CVE-2026-35535:
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.
For more information, see:
https://www.cve.org/CVERecord?id=CVE-2026-35535
[1] https://salsa.debian.org/sudo-team/sudo/-/blob/debian/trixie/debian/patches/0006-exec_mailer-Set-group-as-well-as-uid-when-running-th.patch
Signed-off-by: Thomas Perale <thomas.perale@mind.be>
Signed-off-by: Fiona Klute <fiona.klute@gmx.de>