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Debian LTS openssl Important Use-After-Free NULL Pointer Issues DLA-4624-1

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Ubuntu 20.04 alsa-lib Important Denial of Service Fix USN-8044-2

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Ubuntu 26.04 LTS node-shell-quote Important Denial of Service CVE-2026-9277

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Mageia 9 Suricata Critical Performance Security Issues MGASA-2026-0181

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Mageia 9 PackageKit Important TOCTOU Race Escalation CVE-2026-41651

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Mageia 9 Unbound Critical Remote Code Execution Advisory 2026-0034

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Ubuntu 26.04 LTS Netatalk Multiple Security Issues USN-8395-1

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Fedora 43 mingw-objfw 1.5.5 Update Security Fix FEDORA-2026-de23fedf3e

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Fedora 43 objfw Important Update 1.5.5 Bug Fixes June 2026

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[{"id":483,"title":"Self-taught through trial and error","votes":549,"type":"x","order":1,"pct":78.54,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.29,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.86,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.3,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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Ls Advisories Ubuntu Esm H240
Price Tag 1security advisorydenial of serviceremote access

Ubuntu Exim Critical Denial of Service SMTP Smuggling Vuln 8382-1

Several security issues were fixed in Exim.. ========================================================================== Ubuntu Security Notice USN-8382-1 June 03, 2026 exim4 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: Several security issues were fixed in Exim. Software Description: - exim4: Exim is a mail transport agent Details: Timo Longin discovered that Exim incorrectly handled certain SMTP messages in PIPELINING/CHUNKING configurations. A remote attacker could possibly use this issue to perform SMTP smuggling. This issue only affected Ubuntu 14.04 LTS. (CVE-2023-51766) It was discovered that Exim incorrectly handled certain malformed JSON data in headers. A remote attacker could possibly use this issue to crash Exim, resulting in a denial of service, or execute arbitrary code. This issue only affected Ubuntu 20.04 LTS. (CVE-2026-40685) It was discovered that Exim incorrectly handled certain malformed UTF-8 headers. A remote attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 20.04 LTS. (CVE-2026-40686) It was discovered that Exim incorrectly handled certain SPA resources. A remote attacker could possibly use this issue to crash Exim, resulting in a denial of service, or obtain sensitive information. This issue only affected Ubuntu 20.04 LTS. (CVE-2026-40687) It was discovered that Exim incorrectly handled certain CHUNKING transfers in some GnuTLS configurations. A remote attacker could possibly use this issue to crash Exim, resulting in a denial of service, or execute arbitrary code. This issue only affected Ubuntu 20.04 LTS. (CVE-2026-45185) Warisjeet Singh discovered that Exim incorrectly handled certain proxy connections in builds with proxy support enabled. A remote attacker could possibly use this issue to obtain sensitive information.This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2026-48840) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS exim4 4.93-13ubuntu1.12+esm1 Available with Ubuntu Pro exim4-base 4.93-13ubuntu1.12+esm1 Available with Ubuntu Pro exim4-daemon-heavy 4.93-13ubuntu1.12+esm1 Available with Ubuntu Pro exim4-daemon-light 4.93-13ubuntu1.12+esm1 Available with Ubuntu Pro exim4-dev 4.93-13ubuntu1.12+esm1 Available with Ubuntu Pro eximon4 4.93-13ubuntu1.12+esm1 Available with Ubuntu Pro Ubuntu 18.04 LTS exim4 4.90.1-1ubuntu1.10+esm6 Available with Ubuntu Pro exim4-base 4.90.1-1ubuntu1.10+esm6 Available with Ubuntu Pro exim4-daemon-heavy 4.90.1-1ubuntu1.10+esm6 Available with Ubuntu Pro exim4-daemon-light 4.90.1-1ubuntu1.10+esm6 Available with Ubuntu Pro exim4-dev 4.90.1-1ubuntu1.10+esm6 Available with Ubuntu Pro eximon4 4.90.1-1ubuntu1.10+esm6 Available with Ubuntu Pro Ubuntu 16.04 LTS exim4 4.86.2-2ubuntu2.6+esm9 Available with Ubuntu Pro exim4-base 4.86.2-2ubuntu2.6+esm9 Available with Ubuntu Pro exim4-daemon-heavy 4.86.2-2ubuntu2.6+esm9 Available with Ubuntu Pro exim4-daemon-light 4.86.2-2ubuntu2.6+esm9 Available with Ubuntu Pro exim4-dev 4.86.2-2ubuntu2.6+esm9 Available with Ubuntu Pro eximon4 4.86.2-2ubuntu2.6+esm9 Available with Ubuntu Pro Ubuntu 14.04 LTS exim4 4.82-3ubuntu2.4+esm9 Available with Ubuntu Pro exim4-base 4.82-3ubuntu2.4+esm9 Available with Ubuntu Pro exim4-daemon-heavy 4.82-3ubuntu2.4+esm9 Available with Ubuntu Pro exim4-daemon-light 4.82-3ubuntu2.4+esm9 Available with Ubuntu Pro exim4-dev 4.82-3ubuntu2.4+esm9 Available with Ubuntu Pro eximon4 4.82-3ubuntu2.4+esm9 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-8382-1 CVE-2023-51766, CVE-2026-40685, CVE-2026-40686, CVE-2026-40687, CVE-2026-45185, CVE-2026-48840 . Multiple security issues in Exim on Ubuntu require attention to prevent remote attacks and potential service disruption.. Exim security, Ubuntu vulnerabilities, mail transport agent, remote access, denial of service. . Severity: Critical. LinuxSecurity.com Team

Calendar 2 Jun 05, 2026 •Critical Ubuntu
197
Ls Advisories Deblts Esm H240
Price Tag 1security advisorydebiansendmail

Debian 10: DLA-3829-2 Critical: Sendmail Fix for SMTP Smuggling

Fixing CVE-2023-51765 (smtp smuggling) requires to reject email that include NUL bytes, in some configuration. Previous security version of sendmail, by default, does not . - ------------------------------------------------------------------------- Debian LTS Advisory DLA-3829-2 This email address is being protected from spambots. You need JavaScript enabled to view it. https://www.debian.org/lts/security/ Bastien Roucariès June 20, 2024 https://wiki.debian.org/LTS - ------------------------------------------------------------------------- Package : sendmail Version : 8.15.2-14~deb10u3 Fixing CVE-2023-51765 (smtp smuggling) requires to reject email that include NUL bytes, in some configuration. Previous security version of sendmail, by default, does not reject email that include NUL bytes. For Debian 10 buster, this problem has been fixed in version 8.15.2-14~deb10u3. We recommend that you upgrade your sendmail packages. For the detailed security status of sendmail please refer to its security tracker page at: https://security-tracker.debian.org/tracker/source-package/sendmail 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 . Mitigations for sendmail weakness CVE-2023-51765 are incorporated in Debian LTS DLA-3829-2. It is advisable to upgrade for enhanced security.. Debian Sendmail Update, SMTP Smuggling Fix. . Severity: Critical. LinuxSecurity.com Team

Calendar 2 Jun 20, 2024 •Critical Debian LTS
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[{"id":483,"title":"Self-taught through trial and error","votes":549,"type":"x","order":1,"pct":78.54,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.29,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.86,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.3,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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