AlmaLinux released a batch of security advisories to address critical vulnerabilities across multiple software packages. The updates target widely used tools like Samba, Ruby, Unbound, and Vim while patching remote code execution flaws and denial of service risks that could compromise system integrity. Administrators managing AlmaLinux versions eight through ten should prioritize these patches immediately since several issues allow attackers to bypass authentication or trigger arbitrary file overwrites. Regular maintenance cycles remain essential for keeping network infrastructure secure against rapidly evolving threats.

ALSA-2026:22730: vim security update (Moderate)
ALSA-2026:23231: unbound security update (Important)
ALSA-2026:22715: expat security update (Important)
ALSA-2026:23102: delve security update (Important)
ALSA-2026:22717: vim security update (Moderate)
ALSA-2026:22551: mod_http2 security update (Moderate)
ALSA-2026:20606: ruby4.0 security update (Important)
ALSA-2026:22963: samba security update (Critical)
ALSA-2026:23258: kernel security update (Important)

ALSA-2026:22730: vim security update (Moderate)

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AlmaLinux: 8
Type: Security
Severity: Moderate
Release date: 2026-06-04

Summary:

Vim (Vi IMproved) is an updated and improved version of the vi editor.

Security Fix(es):

* vim: zip.vim: Vim zip.vim plugin: Arbitrary file overwrite via path traversal bypass (CVE-2026-35177)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/8/ALSA-2026-22730.html

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Kind regards,
AlmaLinux Team

ALSA-2026:23231: unbound security update (Important)

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AlmaLinux: 10
Type: Security
Severity: Important
Release date: 2026-06-04

Summary:

The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.

Security Fix(es):

* unbound: Heap overflow and crash with multiple nsid, cookie, padding EDNS options (CVE-2026-42944)
* unbound: Unbound DNSSEC Validator Denial of Service via Incorrect Write Offset Counter in Chase-Reply Messages (CVE-2026-42959)
* unbound: Unbound DNSSEC Validator Use-After-Free via Deep Copy Pointer Overwrite Leading to DoS and Possible Remote Code Execution (CVE-2026-33278)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-23231.html

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Kind regards,
AlmaLinux Team

ALSA-2026:22715: expat security update (Important)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 10
Type: Security
Severity: Important
Release date: 2026-06-04

Summary:

Expat is a C library for parsing XML documents.

Security Fix(es):

* libexpat: denial of service via crafted XML input (CVE-2026-45186)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-22715.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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Kind regards,
AlmaLinux Team

ALSA-2026:23102: delve security update (Important)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 10
Type: Security
Severity: Important
Release date: 2026-06-04

Summary:

Delve is a debugger for the Go programming language. The goal of the project is to provide a simple, full featured debugging tool for Go. Delve should be easy to invoke and easy to use. Chances are if you're using a debugger, things aren't going your way. With that in mind, Delve should stay out of your way as much as possible.

Security Fix(es):

* crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281)
* crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283)
* crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-23102.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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Kind regards,
AlmaLinux Team

ALSA-2026:22717: vim security update (Moderate)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 9
Type: Security
Severity: Moderate
Release date: 2026-06-04

Summary:

Vim (Vi IMproved) is an updated and improved version of the vi editor.

Security Fix(es):

* vim: zip.vim: Vim zip.vim plugin: Arbitrary file overwrite via path traversal bypass (CVE-2026-35177)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-22717.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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Kind regards,
AlmaLinux Team

ALSA-2026:22551: mod_http2 security update (Moderate)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 9
Type: Security
Severity: Moderate
Release date: 2026-06-04

Summary:

The mod_h2 Apache httpd module implements the HTTP2 protocol (h2+h2c) on top of libnghttp2 for httpd 2.4 servers.

Security Fix(es):

* httpd: Apache HTTP Server: HTTP/2 DoS by Memory Increase (CVE-2025-53020)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2026-22551.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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Kind regards,
AlmaLinux Team

ALSA-2026:20606: ruby4.0 security update (Important)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 10
Type: Security
Severity: Important
Release date: 2026-06-04

Summary:

Ruby is the interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). It is simple, straight-forward, and extensible.

Security Fix(es):

* ruby/json: Ruby JSON: Denial of Service or Information Disclosure via format string injection (CVE-2026-33210)
* erb: ERB: Arbitrary code execution via deserialization bypass (CVE-2026-41316)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-20606.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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Kind regards,
AlmaLinux Team

ALSA-2026:22963: samba security update (Critical)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 10
Type: Security
Severity: Critical
Release date: 2026-06-04

Summary:

Samba is an open-source implementation of the Server Message Block (SMB) protocol and the related Common Internet File System (CIFS) protocol, which allow PC-compatible machines to share files, printers, and various information.

Security Fix(es):

* samba: Missing access check on reparse point operations (CVE-2026-1933)
* samba: vfs_worm does not block directory modification (CVE-2026-2340)
* samba: group policy certificate enrollment uses (http://) without validation (CVE-2026-3012)
* samba: Samba: Remote Code Execution in printing subsystem via unescaped job description (CVE-2026-4480)
* ngtcp2: ngtcp2: Denial of service via stack buffer overflow during QUIC handshake (CVE-2026-40170)
* samba: Remote Code Execution in SAMR (CVE-2026-4408)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/10/ALSA-2026-22963.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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Kind regards,
AlmaLinux Team

ALSA-2026:23258: kernel security update (Important)

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You are receiving an AlmaLinux Security update email because you subscribed to receive errata notifications from AlmaLinux.

AlmaLinux: 8
Type: Security
Severity: Important
Release date: 2026-06-04

Summary:

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/8/ALSA-2026-23258.html

This message is automatically generated, please don’t reply. For further questions, please, contact us via the AlmaLinux community chat: https://chat.almalinux.org/.
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Kind regards,
AlmaLinux Team