Debian released security advisories addressing vulnerabilities in xorg-server, OpenVPN, and Chromium that could result in privilege escalation, server crashes, and arbitrary code execution. The xorg-server patch resolves nine CVEs that allow attackers to gain elevated access when the X server runs with privileges, while the OpenVPN fix targets a race condition caused by use-after-free errors during TLS session promotion that risks memory leaks and denial of service. Chromium receives the most extensive update with eighteen CVEs resolved in the LTS distribution, preventing potential remote code execution, denial of service, and information disclosure.

[DSA 6370-1] xorg-server security update
ELA-1762-1 openvpn security update
[DLA 4654-1] chromium security update

[SECURITY] [DSA 6370-1] xorg-server security update

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Debian Security Advisory DSA-6370-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
June 27, 2026 https://www.debian.org/security/faq
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Package : xorg-server
CVE ID : CVE-2026-50256 CVE-2026-50257 CVE-2026-50258 CVE-2026-50259
CVE-2026-50260 CVE-2026-50261 CVE-2026-50262 CVE-2026-50263
CVE-2026-50264
Debian Bug : 1138680

Several vulnerabilities were discovered in the Xorg X server, which may
result in privilege escalation if the X server is running privileged.

For the stable distribution (trixie), these problems have been fixed in
version 2:21.1.16-1.3+deb13u3.

We recommend that you upgrade your xorg-server packages.

For the detailed security status of xorg-server please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/xorg-server

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

ELA-1762-1 openvpn security update (by )

Package : openvpn


Version : 2.4.0-6+deb9u6 (stretch), 2.4.7-1+deb10u3 (buster)


Related CVEs :

CVE-2026-40215



A vulnerability has been discovered in OpenVPN, a virtual private network
application.

CVE-2026-40215

A race condition allows remote attackers to potentially cause a server
crash or leak heap memory via a use-after-free triggered during TLS
session promotion.

ELA-1762-1 openvpn security update (by )

[SECURITY] [DLA 4654-1] chromium security update

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Debian LTS Advisory DLA-4654-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
June 27, 2026 https://wiki.debian.org/LTS
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Package : chromium
Version : 149.0.7827.196-1~deb12u1
CVE ID : CVE-2026-13021 CVE-2026-13022 CVE-2026-13023 CVE-2026-13024
CVE-2026-13025 CVE-2026-13026 CVE-2026-13027 CVE-2026-13028
CVE-2026-13029 CVE-2026-13030 CVE-2026-13031 CVE-2026-13032
CVE-2026-13033 CVE-2026-13034 CVE-2026-13035 CVE-2026-13036
CVE-2026-13037 CVE-2026-13038

Security issues were discovered in Chromium which could result
in the execution of arbitrary code, denial of service, or information
disclosure.

For Debian 12 bookworm, these problems have been fixed in version
149.0.7827.196-1~deb12u1.

We recommend that you upgrade your chromium packages.

For the detailed security status of chromium please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/chromium

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS