CVE-2026-15588Proof of concept (PoC) published · CISA

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

CVSS score

5.3

EPSS probability

%0.5

Risk score

0.0

Published

2 mo ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

Only the personal products you have added to your account are assessed; an organisation's inventory does not appear here.

Checking session…

Vulnerability description

DayBreach CVE AI Research

CVE-2026-15588 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-15588 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	Red Hat	Red Hat Enterprise Linux 10	View
2	Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support	View
3	Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support	View
4	Red Hat	Red Hat Enterprise Linux 8	View
5	Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	View
6	Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	View
7	Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	View
8	Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	View
9	Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	View
10	Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	View
11	Red Hat	Red Hat Enterprise Linux 9	View
12	Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	View
13	Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	View
14	Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support	View
15	Red Hat	Cert Manager support for Red Hat OpenShift release 1.17	View
16	Red Hat	Cert Manager support for Red Hat OpenShift release 1.17	View
17	Red Hat	Cert Manager support for Red Hat OpenShift release 1.17	View
18	Red Hat	Cert Manager support for Red Hat OpenShift release 1.17	View
19	Red Hat	Cert Manager support for Red Hat OpenShift release 1.17	View
20	Red Hat	Cert Manager support for Red Hat OpenShift release 1.18	View
21	Red Hat	Cert Manager support for Red Hat OpenShift release 1.18	View
22	Red Hat	Cert Manager support for Red Hat OpenShift release 1.18	View
23	Red Hat	Cert Manager support for Red Hat OpenShift release 1.18	View
24	Red Hat	Cert Manager support for Red Hat OpenShift release 1.18	View
25	Red Hat	Cert Manager support for Red Hat OpenShift release 1.19	View
26	Red Hat	Cert Manager support for Red Hat OpenShift release 1.19	View
27	Red Hat	Cert Manager support for Red Hat OpenShift release 1.19	View
28	Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	View
29	Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	View
30	Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	View
31	Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	View
32	Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	View
33	Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	View
34	Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	View
35	Red Hat	Cert Manager support for Red Hat OpenShift release 1.20	View
36	Red Hat	Red Hat AI Inference Server 3.2	View
37	Red Hat	Red Hat AI Inference Server 3.2	View
38	Red Hat	Red Hat AI Inference Server 3.2	View
39	Red Hat	Red Hat AI Inference Server 3.5	View
40	Red Hat	Red Hat AI Inference Server 3.5	View
41	Red Hat	Red Hat AI Inference Server 3.5	View
42	Red Hat	Red Hat AI Inference Server 3.5	View
43	Red Hat	Red Hat AI Inference Server 3.5	View
44	Red Hat	Red Hat AI Inference Server 3.5	View
45	Red Hat	Red Hat Discovery 2	View
46	Red Hat	Red Hat Discovery 2	View
47	Red Hat	Red Hat Hardened Images	View
48	Red Hat	Red Hat Hardened Images	View
49	Red Hat	Red Hat Hardened Images	View
50	Red Hat	Red Hat OpenShift AI 3.0	View
51	Red Hat	Red Hat OpenShift AI 3.0	View
52	Red Hat	Red Hat OpenShift AI 3.0	View
53	Red Hat	Red Hat OpenShift AI 3.0	View
54	Red Hat	Red Hat OpenShift AI 3.0	View
55	Red Hat	Red Hat OpenShift AI 3.2	View
56	Red Hat	Red Hat OpenShift AI 3.2	View
57	Red Hat	Red Hat OpenShift AI 3.2	View
58	Red Hat	Red Hat OpenShift AI 3.2	View
59	Red Hat	Red Hat OpenShift AI 3.2	View
60	Red Hat	Red Hat OpenShift AI 3.2	View
61	Red Hat	Red Hat OpenShift AI 3.4	View
62	Red Hat	Red Hat OpenShift AI 3.4	View
63	Red Hat	Red Hat OpenShift AI 3.4	View
64	Red Hat	Red Hat OpenShift AI 3.4	View
65	Red Hat	Red Hat OpenShift AI 3.4	View
66	Red Hat	Red Hat OpenShift AI 3.4	View
67	Red Hat	Red Hat OpenShift AI 3.4	View
68	Red Hat	Red Hat OpenShift AI 3.4	View
69	Red Hat	Red Hat OpenShift AI 3.4	View
70	Red Hat	Red Hat OpenShift AI 3.4	View
71	Red Hat	Red Hat OpenShift AI 3.4	View
72	Red Hat	Red Hat OpenShift AI 3.5	View
73	Red Hat	Red Hat OpenShift AI 3.5	View
74	Red Hat	Red Hat OpenShift AI 3.5	View
75	Red Hat	Red Hat OpenShift AI 3.5	View
76	Red Hat	Red Hat OpenShift AI 3.5	View
77	Red Hat	Red Hat OpenShift AI 3.5	View
78	Red Hat	Red Hat OpenShift AI 3.5	View
79	Red Hat	Red Hat OpenShift AI 3.5	View
80	Red Hat	Red Hat Update Infrastructure 5	View
81	Red Hat	Red Hat Update Infrastructure 5	View
82	Red Hat	Red Hat Update Infrastructure 5	View
83	Red Hat	Red Hat Update Infrastructure 5	View
84	Red Hat	Red Hat Update Infrastructure 5	View
85	Red Hat	Red Hat Update Infrastructure 5	View
86	Red Hat	Red Hat Update Infrastructure 5	View
87	Red Hat	Red Hat Update Infrastructure 5	View
88	Red Hat	Red Hat Enterprise Linux 10	View
89	Red Hat	Red Hat Enterprise Linux 6	View
90	Red Hat	Red Hat Enterprise Linux 8	View
91	Red Hat	Red Hat Enterprise Linux 9	View
92	Red Hat	Red Hat OpenShift Container Platform 4	View

Total affected vendors: 1|Products: 92

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
5.3	CVSS 3.x	—	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L	Microsoft MSRC
5.3	CVSS V3_1	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L	CVE CNA
5.3	CVSS V31	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

1 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

reference

Yama veya çözüm referansı

Open source

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Apply the official update named in the evidence only to the matching product and version.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-15588 is associated with the following CWEs:

CWE-770: Allocation of Resources Without Limits or Throttling

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-15588 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureYerel erişim

PermissionsLow

UserGerekmiyor

Official Sources and Advisories

RHSA-2026:39985vendor-advisory RHSA-2026:40485vendor-advisory RHSA-2026:42329vendor-advisory RHSA-2026:55440vendor-advisory RHSA-2026:57015vendor-advisory RHSA-2026:58981vendor-advisory RHSA-2026:61766vendor-advisory RHSA-2026:61783vendor-advisory RHSA-2026:63135vendor-advisory RHSA-2026:63138vendor-advisory

CVSS Vector Radar Chart

5.3 / 10

Vulnerability Scoring Details

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

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow privileges

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)Low

Yama doğrulandı

1 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

Red Hat

Weakness Type (CWE & CAPEC)

CWE-770

Similar Vulnerabilities

9.8

CVE-2024-23897 Actively exploitedjenkins: Arbitrary file read vulnerability through the CLI can lead to RCE

VendorRed Hat Productred_hat_openshift_container_platform_3.11:jenkins+9 etkilenen

Partial patch Public Exploits:10EPSS %1002 y ago

9.8

CVE-2022-22963 Actively exploitedspring-cloud-function: Remote code execution by malicious Spring Expression

VendorRed Hat Product8Base-Openshift-Serverless-1.21:openshift-serverless-1/client-kn-rhel8@sha256:2199a60cb46225b1551c0882fa0694fa846df5d6e3246f7cfbf6ddf5b55f6b5f_ppc64le+9 etkilenen

Patch verified Public Exploits:11EPSS %1004 y ago

9.8

CVE-2023-46604 Actively exploitedactivemq-openwire: OpenWire Module: Unbounded deserialization causes ActiveMQ to be vulnerable to a remote code execution (RCE) attack

VendorRed Hat Productred_hat_jboss_fuse_service_works_6:activemq-openwire+8 etkilenen

Partial patch Public Exploits:9EPSS %1003 y ago

9.8

CVE-2020-16846 Actively exploitedsalt: sending crafted web requests to the Salt API, with the SSH client enabled, can result in shell injection

VendorRed Hat Productred_hat_ceph_storage_2:salt+3 etkilenen

No patch (vendor) Public Exploits:2EPSS %1006 y ago

9.8

CVE-2012-0507 Actively exploitedVulnerability in N/a

Vendorn/a Productn/a+24 etkilenen

Partial patch Public Exploits:1EPSS %9814 y ago

9.6

CVE-2023-4863 Actively exploitedlibwebp: Heap buffer overflow in WebP Codec

VendorRed Hat Productred_hat_enterprise_linux_6:firefox+24 etkilenen

Partial patch Public Exploits:8EPSS %1003 y ago

Get this vulnerability through the API

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

Get a free key Documentation

curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-15588"