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5.3 Medium

CVE-2026-15588 Gdbusserver: glib2: gdbusserver pre-authentication dos via unbounded sasl line buffering

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 3.1 detail

Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Exploitable with local access to the machine, with an ordinary account and without any user action; the impact on data or service is limited.

Attack vector
Local
Attack complexity
Low
Privileges required
Low
Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Affected products and versions

Product Affected versions Fixed in
Red Hat Enterprise Linux 10 Versions not published
Red Hat Enterprise Linux 6 Versions not published
Red Hat Enterprise Linux 7 Versions not published
Red Hat Enterprise Linux 8 Versions not published
Red Hat Enterprise Linux 9 Versions not published
Red Hat Hardened Images 2.89 earliest → < 2.89.2-2.hum1 2.89.2-2.hum1
Red Hat OpenShift Container Platform 4 Versions not published
Red Hat Update Infrastructure 5 1788880581 earliest → < 1788880581 1788880581
Red Hat Discovery 2 1788206196 earliest → < 1788206196 1788206196
Show the 24 other branches
Product Affected versions Fixed in
Cert Manager support for Red Hat OpenShift release 1.19 1788348594 earliest → < 1788348594 1788348594
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Versions not published
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Versions not published
Red Hat Enterprise Linux 7 Extended Lifecycle Support Versions not published
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 10.0 Extended Update Support Versions not published
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Versions not published
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Versions not published
Red Hat Enterprise Linux 8.8 Telecommunications Update Service Versions not published
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Versions not published
Red Hat Enterprise Linux 9.6 Extended Update Support Versions not published
Cert Manager support for Red Hat OpenShift release 1.20 1790598593 earliest → < 1790598593 1790598593
Red Hat AI Inference Server 3.2 1790621713 earliest → < 1790621713 1790621713
Red Hat OpenShift AI 3.0 1790276974 earliest → < 1790276974 1790276974
Red Hat OpenShift AI 3.2 1790703494 earliest → < 1790703494 1790703494
Red Hat OpenShift AI 3.4 1791232048 earliest → < 1791232048 1791232048
Red Hat OpenShift AI 3.5 1790703706 earliest → < 1790703706 1790703706
Red Hat AI Inference Server 3.5 1791473614 earliest → < 1791473614 1791473614
Cert Manager support for Red Hat OpenShift release 1.17 1791970484 earliest → < 1791970484 1791970484
Cert Manager support for Red Hat OpenShift release 1.18 1791966259 earliest → < 1791966259 1791966259
Red Hat Enterprise Linux AI 3.5 1793135863 earliest → < 1793135863 1793135863
Red Hat OpenShift Container Platform 5 Versions not published
Red Hat OpenShift AI (RHOAI) Versions not published

Other CVEs of Red Hat Enterprise Linux 10

The 1455 CVEs of Red Hat Enterprise Linux 10 →
CVE-2026-120749 Dbus: dbus-daemon: dbus-daemon aborts (reply_serial != 0) when a broadcast from the driver cannot be delivered to a monitored bus 6.2 Medium CVE-2026-123151 Gdb: gdb: stack buffer overflow in parse_tsv_definition via stale rs->buf tail Not rated CVE-2026-121997 Gdb: gdbserver: heap buffer overflow in cmd_qtdpsrc via qtdpsrc declared/actual length mismatch 8.1 High CVE-2026-121996 Gdb: gdbserver: heap disclosure and wild pointer in gdb_parse_agent_expr via untrusted agent-expression length 8.2 High
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