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CVE-2026-15588 (GCVE-0-2026-15588)

Vulnerability from cvelistv5 – Published: 2026-07-20 12:12 – Updated: 2026-09-09 07:45
VLAI
Title
Gdbusserver: glib2: gdbusserver pre-authentication dos via unbounded sasl line buffering
Summary
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 13:49 UTC
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:39985 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:40485 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:42329 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:55440 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:57015 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:58981 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:61766 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:61783 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:63135 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:63138 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:63140 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65762 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65763 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65767 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65768 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65769 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65770 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65771 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:65773 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-15588 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2499675 issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/glib/-/issues/3985
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:2.80.4-12.el10_2.21 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:2.80.4-4.el10_0.17 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:2.56.1-13.el7_9.1 , < * (rpm)
    cpe:/o:redhat:rhel_els:7
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:2.56.4-177.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::crb
    cpe:/o:redhat:enterprise_linux:8::baseos
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Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:2.56.4-10.el8_4.7 , < * (rpm)
    cpe:/o:redhat:rhel_aus:8.4::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
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Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:2.56.4-10.el8_4.7 , < * (rpm)
    cpe:/o:redhat:rhel_aus:8.4::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
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Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:2.56.4-158.el8_6.7 , < * (rpm)
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.6::baseos
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Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:2.56.4-158.el8_6.7 , < * (rpm)
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.6::baseos
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Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:2.56.4-165.el8_8.2 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.8::baseos
    cpe:/o:redhat:rhel_tus:8.8::baseos
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Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:2.56.4-165.el8_8.2 , < * (rpm)
    cpe:/o:redhat:rhel_e4s:8.8::baseos
    cpe:/o:redhat:rhel_tus:8.8::baseos
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:2.68.4-19.el9_8.9 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
    cpe:/o:redhat:enterprise_linux:9::baseos
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Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:2.68.4-7.el9_2.7 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::appstream
    cpe:/o:redhat:rhel_e4s:9.2::baseos
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Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:2.68.4-14.el9_4.8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4::appstream
    cpe:/o:redhat:rhel_e4s:9.4::baseos
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:2.68.4-16.el9_6.7 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6::appstream
    cpe:/a:redhat:rhel_eus:9.6::crb
    cpe:/o:redhat:rhel_eus:9.6::baseos
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Red Hat Cert Manager support for Red Hat OpenShift release 1.19 Unaffected: 1788348522 , < * (rpm)
    cpe:/a:redhat:cert_manager:1.19::el9
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Red Hat Cert Manager support for Red Hat OpenShift release 1.19 Unaffected: 1788348571 , < * (rpm)
    cpe:/a:redhat:cert_manager:1.19::el9
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Red Hat Cert Manager support for Red Hat OpenShift release 1.19 Unaffected: 1788348594 , < * (rpm)
    cpe:/a:redhat:cert_manager:1.19::el9
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Red Hat Red Hat Discovery 2 Unaffected: 1788205779 , < * (rpm)
    cpe:/a:redhat:discovery:2::el9
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Red Hat Red Hat Discovery 2 Unaffected: 1788206196 , < * (rpm)
    cpe:/a:redhat:discovery:2::el9
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Red Hat Red Hat Hardened Images Unaffected: 2.89.1-1.1.hum1 , < * (rpm)
    cpe:/a:redhat:hummingbird:1
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Red Hat Red Hat Hardened Images Unaffected: 2.89.1-1.2.hum1 , < * (rpm)
    cpe:/a:redhat:hummingbird:1
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Red Hat Red Hat Hardened Images Unaffected: 2.89.2-2.hum1 , < * (rpm)
    cpe:/a:redhat:hummingbird:1
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Red Hat Red Hat Update Infrastructure 5 Unaffected: 1787241211 , < * (rpm)
    cpe:/a:redhat:rhui:5::el9
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Red Hat Red Hat Update Infrastructure 5 Unaffected: 1787135742 , < * (rpm)
    cpe:/a:redhat:rhui:5::el9
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Red Hat Red Hat Update Infrastructure 5 Unaffected: 1787241260 , < * (rpm)
    cpe:/a:redhat:rhui:5::el9
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Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
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Date Public
2026-07-12 10:10
Credits
Red Hat would like to thank Gitee Codepecker Lab for reporting this issue.
Show details on NVD website
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      "dataType": "CVE_RECORD",
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    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.