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Multiple Ruby Vulnerabilities in Oracle Linux Require Immediate Attention

Multiple Ruby Vulnerabilities in Oracle Linux Require Immediate Attention

First seen 7 Jul 2026, 01:50 UTC • •
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ThreatCluster AI
ThreatCluster •July 8, 2026 at 00:00 UTC
  • •Critical vulnerabilities in Ruby affect Oracle Linux 8 and 9, requiring urgent updates.
  • •CVE-2026-41316 allows arbitrary code execution via deserialization bypass.
  • •Denial of service vulnerabilities (CVE-2026-42245, CVE-2026-33210) can lead to information disclosure.

Recent updates for Oracle Linux address critical vulnerabilities in Ruby affecting versions 2.5, 3.3, and 4.0. Key issues include a code execution flaw (CVE-2026-41316) and denial of service vulnerabilities (CVE-2026-42245, CVE-2026-33210) that could be exploited via crafted IMAP responses and format string injections. The vulnerabilities impact various Ruby gems and could allow attackers to execute arbitrary code or disclose sensitive information. Systems running Oracle Linux 8 and 9 are at risk, necessitating immediate patching. The vulnerabilities were disclosed between March and May 2026, with some having public proof-of-concept exploits. Administrators are advised to update their Ruby installations and associated gems promptly to mitigate these risks.

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Timeline

2019-11-16
CVE-2019-19012 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2021-12-08
CVE-2021-43809 published
Vulnerability assigned a CVE identifier and published in the National Vulnerability Database.
MITRE
2026-03-20
CVE-2026-33210 published
Denial of service vulnerability via format string injection disclosed, affecting Ruby.
Linuxsecurity
2026-04-24
CVE-2026-41316 published
Arbitrary code execution vulnerability due to deserialization bypass in Ruby disclosed.
Linuxsecurity
2026-05-09
CVE-2026-42245 published
Denial of service vulnerability via crafted IMAP responses disclosed, affecting Ruby.
Linuxsecurity
2026-05-09
CVE-2026-42246 published
Information disclosure vulnerability via MITM attack in Ruby disclosed, affecting net-imap.
Linuxsecurity
2026-05-09
CVE-2026-42258 published
Command injection vulnerability in Ruby disclosed, affecting net-imap.
Linuxsecurity

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Extracted Entities (14)

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