xorg-server is vulnerable to privilege escalation. Integer underflow exists in xserver, ProcXChangeFeedbackControl() leading to local privilege escalation.
www.openwall.com/lists/oss-security/2021/04/13/1
bugzilla.redhat.com/show_bug.cgi?id=1944167
gitlab.freedesktop.org/xorg/xserver/-/commit/7aaf54a1884f71dc363f0b884e57bcb67407a6cd
lists.debian.org/debian-lts-announce/2021/04/msg00013.html
lists.fedoraproject.org/archives/list/[email protected]/message/MDF7TAJE7NPZPNVOXSD5HBIFLNPUOD2V/
lists.fedoraproject.org/archives/list/[email protected]/message/MO6S5OPXUDYBSRSVWVLFLJ6AFERG4HNY/
lists.fedoraproject.org/archives/list/[email protected]/message/N63KL3T22HNFT4FJ7VMVF6U5Q4RFJIQF/
lists.fedoraproject.org/archives/list/[email protected]/message/PEXPCLMVU25AUZTUXC4MYBGPKOAIM5TW/
lists.x.org/archives/xorg-announce/2021-April/003080.html
secdb.alpinelinux.org/v3.10/main.yaml
secdb.alpinelinux.org/v3.11/main.yaml
secdb.alpinelinux.org/v3.12/main.yaml
secdb.alpinelinux.org/v3.13/community.yaml
seclists.org/oss-sec/2021/q2/20
security.gentoo.org/glsa/202104-02
www.debian.org/security/2021/dsa-4893
www.tenable.com/plugins/nessus/148701
www.zerodayinitiative.com/advisories/ZDI-21-463/