A flaw was found in GLib. A buffer over-read can occur in g_io_channel_read_line_backend() in the giochannel.c file when a custom line terminator with a length greater than one is set, causing memcmp to read past the GString buffer. This vulnerability can cause a minor information disclosure of 7 bytes or a denial of service when the buffer over-read crosses a page boundary.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00853.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
GNOME GLib unaffected
Version Status Constraints
0 affected < 2.88.1
Red Hat Red Hat Enterprise Linux 10 affected
Version Status Constraints
0:2.80.4-12.el10_2.21 unaffected < *
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support affected
Version Status Constraints
0:2.80.4-4.el10_0.17 unaffected < *
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support affected
Version Status Constraints
0:2.56.1-13.el7_9.1 unaffected < *
Red Hat Red Hat Enterprise Linux 8 affected
Version Status Constraints
0:2.70.1-9.el8_10 unaffected < *
Red Hat Red Hat Enterprise Linux 8 affected
Version Status Constraints
0:2.56.4-177.el8_10 unaffected < *
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support affected
Version Status Constraints
0:2.56.4-10.el8_4.7 unaffected < *
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On affected
Version Status Constraints
0:2.56.4-10.el8_4.7 unaffected < *
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support affected
Version Status Constraints
0:2.56.4-158.el8_6.7 unaffected < *
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On affected
Version Status Constraints
0:2.56.4-158.el8_6.7 unaffected < *
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service affected
Version Status Constraints
0:2.56.4-165.el8_8.2 unaffected < *
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions affected
Version Status Constraints
0:2.56.4-165.el8_8.2 unaffected < *
Red Hat Red Hat Enterprise Linux 9 affected
Version Status Constraints
0:2.68.4-19.el9_8.9 unaffected < *
Red Hat Red Hat Enterprise Linux 9 affected
Version Status Constraints
0:2.68.4-19.el9_8.9 unaffected < *
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions affected
Version Status Constraints
0:2.68.4-7.el9_2.7 unaffected < *
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions affected
Version Status Constraints
0:2.68.4-14.el9_4.8 unaffected < *
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support affected
Version Status Constraints
0:2.68.4-16.el9_6.7 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 affected
Version Status Constraints
1788348522 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 affected
Version Status Constraints
1788348571 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 affected
Version Status Constraints
1788348571 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 affected
Version Status Constraints
1788348594 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 affected
Version Status Constraints
1790223279 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 affected
Version Status Constraints
1790223719 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 affected
Version Status Constraints
1790272426 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 affected
Version Status Constraints
1790589998 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 affected
Version Status Constraints
1790589912 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 affected
Version Status Constraints
1790589914 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 affected
Version Status Constraints
1790589855 unaffected < *
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 affected
Version Status Constraints
1790598593 unaffected < *
Red Hat Red Hat AI Inference Server 3.2 affected
Version Status Constraints
1790621714 unaffected < *
Red Hat Red Hat Discovery 2 affected
Version Status Constraints
1788205779 unaffected < *
Red Hat Red Hat Discovery 2 affected
Version Status Constraints
1788206196 unaffected < *
Red Hat Red Hat Update Infrastructure 5 affected
Version Status Constraints
1787241211 unaffected < *
Red Hat Red Hat Update Infrastructure 5 affected
Version Status Constraints
1787135742 unaffected < *
Red Hat Red Hat Update Infrastructure 5 affected
Version Status Constraints
1787241260 unaffected < *
Red Hat Red Hat Update Infrastructure 5 affected
Version Status Constraints
1788880445 unaffected < *
Red Hat Red Hat Update Infrastructure 5 affected
Version Status Constraints
1788880464 unaffected < *
Red Hat Red Hat Update Infrastructure 5 affected
Version Status Constraints
1788880456 unaffected < *
Red Hat Red Hat Update Infrastructure 5 affected
Version Status Constraints
1788765051 unaffected < *
Red Hat Red Hat Update Infrastructure 5 affected
Version Status Constraints
1788880581 unaffected < *
Red Hat Red Hat Enterprise Linux 10 affected —
Red Hat Red Hat Enterprise Linux 6 affected —
Red Hat Red Hat Enterprise Linux 9 affected —
Red Hat Red Hat Hardened Images unaffected —

Configuration 1 [-]

OR cpe:2.3:a:gnome:glib:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

No data.

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Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8794-1 GLib vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

To mitigate this vulnerability, restrict any custom line terminator string passed to g_io_channel_set_line_term() to a maximum length of one byte before calling g_io_channel_read_line_backend(). Using the default line terminators will completely neutralize this issue.

References
Link Providers
https://access.redhat.com/errata/RHSA-2026:49512 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:55440 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:57015 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:58981 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:61766 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:61783 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:63135 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:63138 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:63140 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:65762 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:65763 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:65767 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:65768 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:65769 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:65770 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:65771 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:65773 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:66018 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:72394 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:72395 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:72399 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:72470 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:72475 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:72476 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:72502 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:73859 cve-icon cve-icon
https://access.redhat.com/security/cve/CVE-2026-58013 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2492248 cve-icon cve-icon
https://gitlab.gnome.org/GNOME/glib/-/issues/3925 cve-icon cve-icon
History

Wed, 30 Sep 2026 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat ai Inference Server
CPEs cpe:/a:redhat:ai_inference_server:3.2::el9
Vendors & Products Redhat ai Inference Server
References

Tue, 29 Sep 2026 01:00:00 +0000

Type Values Removed Values Added
References

Mon, 28 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
References

Mon, 28 Sep 2026 10:30:00 +0000

Type Values Removed Values Added
References

Mon, 28 Sep 2026 08:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:cert_manager:1.20::el9
References

Thu, 10 Sep 2026 17:30:00 +0000

Type Values Removed Values Added
References

Wed, 09 Sep 2026 08:00:00 +0000

Type Values Removed Values Added
First Time appeared Redhat enterprise Linux Eus
Redhat rhel Eus
Redhat rhel Tus
CPEs cpe:/a:redhat:rhel_eus:9.6::appstream
cpe:/a:redhat:rhel_eus:9.6::crb
cpe:/o:redhat:enterprise_linux_eus:10.0
cpe:/o:redhat:rhel_aus:8.6::baseos
cpe:/o:redhat:rhel_e4s:8.8::baseos
cpe:/o:redhat:rhel_eus:9.6::baseos
cpe:/o:redhat:rhel_eus_long_life:8.6::baseos
cpe:/o:redhat:rhel_tus:8.8::baseos
Vendors & Products Redhat enterprise Linux Eus
Redhat rhel Eus
Redhat rhel Tus
References

Wed, 09 Sep 2026 04:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel E4s
Redhat rhel Els
CPEs cpe:/o:redhat:enterprise_linux:7 cpe:/a:redhat:rhel_e4s:9.2::appstream
cpe:/a:redhat:rhel_e4s:9.4::appstream
cpe:/o:redhat:rhel_e4s:9.2::baseos
cpe:/o:redhat:rhel_e4s:9.4::baseos
cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat rhel E4s
Redhat rhel Els
References

Wed, 09 Sep 2026 03:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhel Aus
Redhat rhel Eus Long Life
CPEs cpe:/o:redhat:rhel_aus:8.4::baseos
cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
Vendors & Products Redhat rhel Aus
Redhat rhel Eus Long Life
References

Tue, 08 Sep 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Redhat cert Manager
CPEs cpe:/a:redhat:cert_manager:1.19::el9
Vendors & Products Redhat cert Manager
References

Tue, 01 Sep 2026 02:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat discovery
CPEs cpe:/a:redhat:discovery:2::el9
Vendors & Products Redhat discovery
References

Mon, 31 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:8::baseos
References

Tue, 25 Aug 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Redhat rhui
CPEs cpe:/a:redhat:rhui:5::el9
Vendors & Products Redhat rhui
References

Wed, 19 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:10.2
References

Mon, 17 Aug 2026 09:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:9::appstream
cpe:/a:redhat:enterprise_linux:9::crb
cpe:/o:redhat:enterprise_linux:9::baseos
References

Mon, 03 Aug 2026 05:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:8::crb
References

Wed, 01 Jul 2026 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Gnome
Gnome glib
Redhat hardened Images
Vendors & Products Gnome
Gnome glib
Redhat hardened Images

Tue, 30 Jun 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 30 Jun 2026 13:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in GLib. A buffer over-read can occur in g_io_channel_read_line_backend() in the giochannel.c file when a custom line terminator with a length greater than one is set, causing memcmp to read past the GString buffer. This vulnerability can cause a minor information disclosure of 7 bytes or a denial of service when the buffer over-read crosses a page boundary.
Title Glib: buffer over-read in glib/giochannel.c via "g_io_channel_read_line_backend"
First Time appeared Redhat
Redhat enterprise Linux
Redhat hummingbird
Weaknesses CWE-126
CPEs cpe:/a:redhat:hummingbird:1
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat hummingbird
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-30T10:24:03.955Z

Reserved: 2026-06-26T20:59:47.855Z

Link: CVE-2026-58013

cve-icon Vulnrichment

Updated: 2026-06-30T14:17:59.369Z

cve-icon NVD

Status : Modified

Published: 2026-06-30T13:19:17.457

Modified: 2026-09-30T11:16:45.833

Link: CVE-2026-58013

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-01T10:01:37Z

Weaknesses