CVE-2026-15588: Allocation of Resources Without Limits or Throttling in Red Hat Red Hat Enterprise Linux 10
A denial-of-service and resource exhaustion vulnerability exists within the `GDBus` component of GLib. The `gdbusauth` authentication mechanism fails to enforce proper length limitations on data lines read from a client. An unauthenticated local or remote attacker can exploit this lack of input validation by sending excessively long streams of data, causing the application to consume massive amounts of system memory and CPU, potentially leading to a crash or system hang.
AI Analysis
Technical Summary
The vulnerability CVE-2026-15588 affects the GDBus component of GLib used in Red Hat Enterprise Linux 9. The gdbusauth authentication mechanism fails to impose proper length restrictions on input data lines from clients. An attacker, without authentication, can exploit this by sending overly long data streams, resulting in excessive consumption of system memory and CPU resources. This can cause the affected application to crash or the system to hang due to resource exhaustion. Red Hat has issued security advisories and updates to the glib2 RPM packages (versions 2.89.1-1.1.hum1 and 2.89.1-1.2.hum1) that include fixes for this vulnerability.
Potential Impact
An unauthenticated local or remote attacker can exploit this vulnerability to cause denial of service by exhausting system memory and CPU resources. This may lead to application crashes or system hangs, impacting availability. The confidentiality and integrity impacts are rated low, but availability impact is high enough to merit a medium severity rating.
Mitigation Recommendations
Red Hat has released fixed versions of the glib2 packages to address CVE-2026-15588. Users should apply the security updates available in Red Hat Hardened Images RPMs, specifically glib2 versions 2.89.1-1.1.hum1 and 2.89.1-1.2.hum1 or later. Refer to the Red Hat advisories RHSA-2026:39985 and RHSA-2026:40485 for detailed update instructions. Patch status is confirmed by the vendor advisories. No alternative mitigations or workarounds are indicated.
CVE-2026-15588: Allocation of Resources Without Limits or Throttling in Red Hat Red Hat Enterprise Linux 10
Description
A denial-of-service and resource exhaustion vulnerability exists within the `GDBus` component of GLib. The `gdbusauth` authentication mechanism fails to enforce proper length limitations on data lines read from a client. An unauthenticated local or remote attacker can exploit this lack of input validation by sending excessively long streams of data, causing the application to consume massive amounts of system memory and CPU, potentially leading to a crash or system hang.
CVSS v3.1
Score 5.3medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-15588 affects the GDBus component of GLib used in Red Hat Enterprise Linux 9. The gdbusauth authentication mechanism fails to impose proper length restrictions on input data lines from clients. An attacker, without authentication, can exploit this by sending overly long data streams, resulting in excessive consumption of system memory and CPU resources. This can cause the affected application to crash or the system to hang due to resource exhaustion. Red Hat has issued security advisories and updates to the glib2 RPM packages (versions 2.89.1-1.1.hum1 and 2.89.1-1.2.hum1) that include fixes for this vulnerability.
Potential Impact
An unauthenticated local or remote attacker can exploit this vulnerability to cause denial of service by exhausting system memory and CPU resources. This may lead to application crashes or system hangs, impacting availability. The confidentiality and integrity impacts are rated low, but availability impact is high enough to merit a medium severity rating.
Mitigation Recommendations
Red Hat has released fixed versions of the glib2 packages to address CVE-2026-15588. Users should apply the security updates available in Red Hat Hardened Images RPMs, specifically glib2 versions 2.89.1-1.1.hum1 and 2.89.1-1.2.hum1 or later. Refer to the Red Hat advisories RHSA-2026:39985 and RHSA-2026:40485 for detailed update instructions. Patch status is confirmed by the vendor advisories. No alternative mitigations or workarounds are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-07-13T13:21:08.322Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-15588","vendor":"Red Hat"}]
Threat ID: 6a5e143c2a4a8d598907dea3
Added to database: 07/20/2026, 12:27:40 UTC
Last enriched: 08/17/2026, 13:24:29 UTC
Last updated: 09/03/2026, 22:52:09 UTC
Views: 101
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