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CVE-2026-58013— Glib: buffer over-read in glib/giochannel.c via "g_io_channel_read_line_backend"

Quick assessment

Affected
GNOME GLib
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GNOME glib是GNOME基金会开源的一个通用的、可移植的实用程序库。提供了许多有用的数据类型、宏、类型转换、字符串实用程序、文件实用程序、主循环抽象等。 GNOME glib 2.88.1之前版本存在缓冲区错误漏洞，该漏洞源于在giochannel.c文件的g_io_channel_read_line_backend函数中，当设置长度大于1的自定义行终止符时可能发生缓冲区过度读取，导致memcmp读取超出GString缓冲区，当缓冲区过度读取跨越页面边界时可导致信息泄露或拒绝服务。

CVSS 6.5 · Medium EPSS 0.50% · P41

Affected Version Matrix 93

VendorProduct Version RangeStatus
GNOME GLib < 2.88.1 affected
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 1791371080< * unaffected
1791371069< * unaffected
1791788287< * unaffected
1791378395< * unaffected
1791970484< * unaffected
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 1791459707< * unaffected
1791459711< * unaffected
1791459759< * unaffected
1789029076< * unaffected
1791966259< * unaffected
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 1788348522< * unaffected
1788348571< * unaffected
1788348571< * unaffected
1788348594< * unaffected
Red Hat Cert Manager support for Red Hat OpenShift release 1.20 1790223279< * unaffected
1790223719< * unaffected
1790272426< * unaffected
1790589998< * unaffected
1790589912< * unaffected
1790589914< * unaffected
1790589855< * unaffected
1790598593< * unaffected
Red Hat Red Hat AI Inference Server 3.2 1790621714< * unaffected
1790621718< * unaffected
1790621713< * unaffected
Red Hat Red Hat AI Inference Server 3.5 1791425869< * unaffected
1791427182< * unaffected
1791803821< * unaffected
1791473631< * unaffected
1791818357< * unaffected
1791473614< * unaffected
Red Hat Red Hat Discovery 2 1788205779< * unaffected
1788206196< * unaffected
Red Hat Red Hat Enterprise Linux 10 0:2.80.4-12.el10_2.21< * unaffected
any affected
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:2.80.4-4.el10_0.17< * unaffected
Red Hat Red Hat Enterprise Linux 6 any affected
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.56.1-13.el7_9.1< * unaffected
Red Hat Red Hat Enterprise Linux 8 0:2.70.1-9.el8_10< * unaffected
0:2.56.4-177.el8_10< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.56.4-10.el8_4.7< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.56.4-10.el8_4.7< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.56.4-158.el8_6.7< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:2.56.4-158.el8_6.7< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:2.56.4-165.el8_8.2< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.56.4-165.el8_8.2< * unaffected
Red Hat Red Hat Enterprise Linux 9 0:2.68.4-19.el9_8.9< * unaffected
0:2.68.4-19.el9_8.9< * unaffected
any affected
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.68.4-7.el9_2.7< * unaffected
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:2.68.4-14.el9_4.8< * unaffected
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.68.4-16.el9_6.7< * unaffected
Red Hat Red Hat Hardened Images any unaffected
Red Hat Red Hat OpenShift AI 3.0 1790276886< * unaffected
1790276884< * unaffected
1790277045< * unaffected
1790276889< * unaffected
1790276974< * unaffected
Red Hat Red Hat OpenShift AI 3.2 1790703497< * unaffected
1790703506< * unaffected
1790703590< * unaffected
1790703568< * unaffected
1790703586< * unaffected
1790703494< * unaffected
Red Hat Red Hat OpenShift AI 3.4 1790703542< * unaffected
1790703539< * unaffected
1790703553< * unaffected
1790703631< * unaffected
1790703597< * unaffected
1790703641< * unaffected
1790703630< * unaffected
1790703541< * unaffected
… +3 more rows
Red Hat Red Hat OpenShift AI 3.5 1790703552< * unaffected
1790703656< * unaffected
1790703557< * unaffected
1790703707< * unaffected
1790703645< * unaffected
1790703554< * unaffected
1790703554< * unaffected
1790703630< * unaffected
… +1 more rows
Red Hat Red Hat Update Infrastructure 5 1787241211< * unaffected
1787135742< * unaffected
1787241260< * unaffected
1788880445< * unaffected
1788880464< * unaffected
1788880456< * unaffected
1788765051< * unaffected
1788880581< * unaffected
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I. Basic Information for CVE-2026-58013

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
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Vulnerability Title
Glib: buffer over-read in glib/giochannel.c via "g_io_channel_read_line_backend"
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区上溢读取
Source: CVE Program / CVE List V5
Vulnerability Title
GNOME glib 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GNOME glib是GNOME基金会开源的一个通用的、可移植的实用程序库。提供了许多有用的数据类型、宏、类型转换、字符串实用程序、文件实用程序、主循环抽象等。 GNOME glib 2.88.1之前版本存在缓冲区错误漏洞，该漏洞源于在giochannel.c文件的g_io_channel_read_line_backend函数中，当设置长度大于1的自定义行终止符时可能发生缓冲区过度读取，导致memcmp读取超出GString缓冲区，当缓冲区过度读取跨越页面边界时可导致信息泄露或拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GNOME GLib 0 ~ 2.88.1 -
Red Hat Red Hat Enterprise Linux 10 0:2.80.4-12.el10_2.21 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:2.80.4-4.el10_0.17 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.56.1-13.el7_9.1 ~ * cpe:/o:redhat:rhel_els:7
Red Hat Red Hat Enterprise Linux 8 0:2.70.1-9.el8_10 ~ * cpe:/a:redhat:enterprise_linux:8::crb
Red Hat Red Hat Enterprise Linux 8 0:2.56.4-177.el8_10 ~ * cpe:/a:redhat:enterprise_linux:8::crb
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.56.4-10.el8_4.7 ~ * cpe:/o:redhat:rhel_aus:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.56.4-10.el8_4.7 ~ * cpe:/o:redhat:rhel_aus:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.56.4-158.el8_6.7 ~ * cpe:/o:redhat:rhel_aus:8.6::baseos
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:2.56.4-158.el8_6.7 ~ * cpe:/o:redhat:rhel_aus:8.6::baseos
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:2.56.4-165.el8_8.2 ~ * cpe:/o:redhat:rhel_e4s:8.8::baseos
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.56.4-165.el8_8.2 ~ * cpe:/o:redhat:rhel_e4s:8.8::baseos
Red Hat Red Hat Enterprise Linux 9 0:2.68.4-19.el9_8.9 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 0:2.68.4-19.el9_8.9 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.68.4-7.el9_2.7 ~ * cpe:/a:redhat:rhel_e4s:9.2::appstream
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:2.68.4-14.el9_4.8 ~ * cpe:/a:redhat:rhel_e4s:9.4::appstream
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.68.4-16.el9_6.7 ~ * cpe:/a:redhat:rhel_eus:9.6::appstream
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 1791371080 ~ * cpe:/a:redhat:cert_manager:1.17::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 1791371069 ~ * cpe:/a:redhat:cert_manager:1.17::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 1791788287 ~ * cpe:/a:redhat:cert_manager:1.17::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 1791378395 ~ * cpe:/a:redhat:cert_manager:1.17::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.17 1791970484 ~ * cpe:/a:redhat:cert_manager:1.17::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 1791459707 ~ * cpe:/a:redhat:cert_manager:1.18::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 1791459711 ~ * cpe:/a:redhat:cert_manager:1.18::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 1791459759 ~ * cpe:/a:redhat:cert_manager:1.18::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 1789029076 ~ * cpe:/a:redhat:cert_manager:1.18::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.18 1791966259 ~ * cpe:/a:redhat:cert_manager:1.18::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 1788348522 ~ * cpe:/a:redhat:cert_manager:1.19::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 1788348571 ~ * cpe:/a:redhat:cert_manager:1.19::el9
Red Hat Cert Manager support for Red Hat OpenShift release 1.19 1788348571 ~ * cpe:/a:redhat:cert_manager:1.19::el9

II. Public POCs for CVE-2026-58013

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-58013

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Vendor Advisories for CVE-2026-58013 (73)

Other References for CVE-2026-58013 (1)

Other References for CVE-2026-58013 (2)

Same Patch Batch · GNOME · 2026-06-30 · 7 CVEs total

CVE-2026-58016 7.5 HIGH Glib: integer underflow in gio/gdbusintrospection.c via "g_dbus_node_info_new_for_xml"
CVE-2026-58014 7.3 HIGH Glib: off-by-one error in glib/gkeyfile.c via "g_key_file_get_locale_string_list"
CVE-2026-58011 6.5 MEDIUM Glib: out-of-bounds read in glib/gdatetime.c:g_date_time_get_ymd via invalid gdatetime
CVE-2026-58012 6.5 MEDIUM Glib: buffer over-read in g_regex_replace() via glib/gregex.c:string_append() and g_utf8_n
CVE-2026-58010 6.5 MEDIUM Glib: buffer over-read in glib/gvariant-serialiser.c via gvs_tuple_is_normal()
CVE-2026-58015 5.9 MEDIUM Glib: path traversal in glib/gio/gdbusauthmechanismsha1.c via keyring_lookup_entry and mec

IV. Related Vulnerabilities

Same product: GLib
Same vendor: GNOME
Same weakness: CWE-126

V. Comments for CVE-2026-58013

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