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fluent-bit

In Fluent Bit 2.1.8 through 2.2.1, a NULL pointer dereference can be caused via an invalid HTTP payload with the content type of x-www-form-urlencoded. It crashes and does not restart. This could result in logs not being delivered properly.

CVE-2024-23722 affects Fluent Bit, a widely used open-source log processor and forwarder, specifically versions 2.1.8 through 2.2.1. The vulnerability arises when Fluent Bit processes an HTTP request with an invalid payload of content type x-www-form-urlencoded, leading to a NULL pointer dereference. This dereference causes the Fluent Bit process to crash and, critically, it does not automatically restart, resulting in a denial of service condition where logs are not forwarded or delivered. The vulnerability is remotely exploitable without any authentication or user interaction, making it accessible to attackers who can send crafted HTTP requests to affected Fluent Bit instances. The flaw is identified as CWE-476, indicating improper handling of NULL pointers in the codebase. Although no active exploitation has been reported, the potential for disruption in logging infrastructure is high, especially in environments where Fluent Bit is deployed as a critical component for log collection and forwarding. The CVSS v3.1 base score is 7.5, reflecting high severity due to network attack vector, low attack complexity, no privileges required, and no user interaction needed, with impact focused on availability. No official patches or updates are linked yet, so mitigation relies on workarounds or configuration changes until a fix is released.

Detailed information about CVE-2024-23722: n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2024-23722: n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2024-23722: n/a

fluent-bit 2.2.2 contains a Use-After-Free vulnerability in /fluent-bit/plugins/custom_calyptia/calyptia.c.

CVE-2024-26455 is a Use-After-Free (CWE-416) vulnerability identified in fluent-bit version 2.2.2, specifically within the /fluent-bit/plugins/custom_calyptia/calyptia.c source code. Use-After-Free vulnerabilities occur when a program continues to use memory after it has been freed, leading to undefined behavior such as crashes or potential code execution. In this case, the vulnerability allows remote attackers to cause a denial of service by triggering a crash in the fluent-bit logging agent without requiring any privileges or user interaction. The vulnerability is remotely exploitable over the network (AV:N), with low attack complexity (AC:L), no privileges required (PR:N), and no user interaction needed (UI:N). The scope is unchanged (S:U), and the impact affects availability only (A:H), with no impact on confidentiality or integrity. Although no public exploits have been reported yet, the vulnerability poses a significant risk to systems running the affected version of fluent-bit, especially in environments relying on the custom_calyptia plugin for log processing. Fluent-bit is widely used in cloud-native environments for log forwarding and processing, making this vulnerability relevant for many organizations. The absence of a patch link indicates that a fix may not yet be publicly available, increasing the urgency for mitigation and monitoring.

Detailed information about CVE-2024-26455: n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2024-26455: n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2024-26455: n/a


CVE-2024-23722: n/aCVE-2024-23722 0 In Fluent Bit 2.1.8 through 2.2.1, a NULL pointer dereference can be caused via an invalid HTTP payload with the content type of x-www-form-urlencoded. It crashes and does not restart. This could result in logs not being delivered properly. HighVulnerabilityUnited StatesGermanyUnited Kingdom+7#cve #cve-2024-23722 Join the discussion	CVE Database V5	03/26/2024, 00:00:00 UTC Added: 02/25/2026, 21:44:49 UTC
CVE-2024-26455: n/aCVE-2024-26455 0 fluent-bit 2.2.2 contains a Use-After-Free vulnerability in /fluent-bit/plugins/custom_calyptia/calyptia.c. HighVulnerabilityUnited StatesGermanyJapan+7#cve #cve-2024-26455 Join the discussion	CVE Database V5	02/26/2024, 00:00:00 UTC Added: 02/25/2026, 21:45:25 UTC

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