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Fencer Vulns
medium 6.5

CVE-2026-58013 json

Glib: buffer over-read in glib/giochannel.c via "g_io_channel_read_line_backend"

published 2026-06-30 4 mo ago modified 2026-11-06 2 d ago also EUVD-2026-40315 , GHSA-4x46-h598-64qr , JLSEC-2026-1246

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

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.

Patch / fix

  • julia Glib_jll 2.88.3+0
  • GNOME GLib 2.88.1
  • Red Hat Red Hat Enterprise Linux 10 0:2.80.4-12.el10_2.21
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:2.80.4-4.el10_0.17
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.56.1-13.el7_9.1
  • Red Hat Red Hat Enterprise Linux 8 0:2.56.4-177.el8_10, 0:2.70.1-9.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.56.4-10.el8_4.7
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.56.4-10.el8_4.7
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.56.4-158.el8_6.7
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:2.56.4-158.el8_6.7
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:2.56.4-165.el8_8.2
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.56.4-165.el8_8.2
  • Red Hat Red Hat Enterprise Linux 9 0:2.68.4-19.el9_8.9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.68.4-7.el9_2.7
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:2.68.4-14.el9_4.8
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.68.4-16.el9_6.7
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.17 1791371069, 1791371080, 1791378395, 1791788287, 1791970484
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.18 1789029076, 1791459707, 1791459711, 1791459759, 1791966259
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.19 1788348522, 1788348571, 1788348594
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20 1790223279, 1790223719, 1790272426, 1790589855, 1790589912, 1790589914, 1790589998, 1790598593
  • Red Hat Red Hat AI Inference Server 3.2 1790621713, 1790621714, 1790621718
  • Red Hat Red Hat AI Inference Server 3.5 1791425869, 1791427182, 1791473614, 1791473631, 1791803821, 1791818357
  • Red Hat Red Hat Discovery 2 1788205779, 1788206196
  • Red Hat Red Hat Enterprise Linux AI 3.5 1793135861, 1793135863, 1793194815, 1793194817, 1793194834, 1793206758
  • Red Hat Red Hat OpenShift AI 3.0 1790276884, 1790276886, 1790276889, 1790276974, 1790277045
  • Red Hat Red Hat OpenShift AI 3.2 1790703494, 1790703497, 1790703506, 1790703568, 1790703586, 1790703590
  • Red Hat Red Hat OpenShift AI 3.4 1790703539, 1790703541, 1790703542, 1790703545, 1790703553, 1790703597, 1790703630, 1790703631, 1790703641, 1791231926, 1791232048
  • Red Hat Red Hat OpenShift AI 3.5 1790703552, 1790703554, 1790703557, 1790703630, 1790703645, 1790703656, 1790703706, 1790703707
  • Red Hat Red Hat Update Infrastructure 5 1787135742, 1787241211, 1787241260, 1788765051, 1788880445, 1788880456, 1788880464, 1788880581
  • glib2.0 Debian 13 2.84.4-3~deb13u4
  • glib2.0 Debian 14 2.88.1-2

debian advisories DEBIAN-CVE-2026-58013

  • glib2.0 Ubuntu 22.04 LTS 2.72.4-0ubuntu2.10
  • glib2.0 Ubuntu 24.04 LTS 2.80.0-6ubuntu3.9
  • glib2.0 Ubuntu 26.04 LTS 2.88.0-1ubuntu0.1
  • glib2.0 Ubuntu Pro 14.04 LTS 2.40.2-0ubuntu1.1+esm8
  • glib2.0 Ubuntu Pro 16.04 LTS 2.48.2-0ubuntu4.8+esm6
  • glib2.0 Ubuntu Pro 18.04 LTS 2.56.4-0ubuntu0.18.04.9+esm6
  • glib2.0 Ubuntu Pro 20.04 LTS 2.64.6-1~ubuntu20.04.9+esm2

ubuntu advisories UBUNTU-CVE-2026-58013

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • glib2 RHEL 8 2.56.4-177.el8_10
  • glib2-fam RHEL 8 2.56.4-177.el8_10
  • glib2-tests RHEL 8 2.56.4-177.el8_10
  • glib2 RHEL 10.2 2.80.4-12.el10_2.21
  • glib2-tests RHEL 10.2 2.80.4-12.el10_2.21
  • glib2 RHEL 9 2.68.4-19.el9_8.9
  • glib2-tests RHEL 9 2.68.4-19.el9_8.9
  • mingw-glib2 RHEL 8 2.70.1-9.el8_10

red hat advisories RHSA-2026:65773RHSA-2026:65770RHSA-2026:65771RHSA-2026:65767RHSA-2026:65768RHSA-2026:65769

  • glib2 Linux Micro 6.1 2.78.6-slfo.1.1_7.1
  • glib2 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 2.78.6-150600.4.38.1
  • glib2 Linux Micro 6.0 2.76.2-13.1
  • glib2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +8 more 2.70.5-150400.3.37.1
  • glib2 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 2.84.4-160000.4.1
  • glib2 SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 2.48.2-12.61.1

suse advisories SUSE-SU-2026:23078-1SUSE-SU-2026:3341-1SUSE-SU-2026:23009-1SUSE-SU-2026:3236-1SUSE-SU-2026:3235-1SUSE-SU-2026:22846-1

  • glib2 openSUSE Leap 16.0 2.84.4-160000.4.1

opensuse advisories openSUSE-SU-2026:21410-1

  • glib2 AlmaLinux 8 2.56.4-177.el8_10
  • glib2-fam AlmaLinux 8 2.56.4-177.el8_10
  • glib2-tests AlmaLinux 8 2.56.4-177.el8_10
  • glib2 AlmaLinux 10 2.80.4-12.el10_2.21
  • glib2-tests AlmaLinux 10 2.80.4-12.el10_2.21
  • glib2 AlmaLinux 9 2.68.4-19.el9_8.9
  • glib2-tests AlmaLinux 9 2.68.4-19.el9_8.9
  • mingw32-glib2 AlmaLinux 8 2.70.1-9.el8_10

almalinux advisories ALSA-2026:61766ALSA-2026:57015ALSA-2026:55440ALSA-2026:49512

  • glib2 Rocky Linux 8 2.56.4-177.el8_10
  • glib2 Rocky Linux 10 2.80.4-12.el10_2.21
  • glib2 Rocky Linux 9 2.68.4-19.el9_8.9
  • mingw-glib2 Rocky Linux 8 2.70.1-9.el8_10

rocky linux advisories RLSA-2026:61766RLSA-2026:57015RLSA-2026:55440RLSA-2026:49512

  • glib Alpine 3.23 2.86.4-r0

alpine advisories ALPINE-CVE-2026-58013

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • glib Azure Linux 3.0 2.78.6-11

azure linux advisories AZL-91442

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-58013 updated cvss 6.5

glib: buffer over-read in glib/giochannel.c via "g_io_channel_read_line_backend"

  • Red Hat Enterprise Linux 6 glib2
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 mingw-glib2, mingw32-glib2, mingw64-glib2 Red Hat Enterprise Linux 10 mingw-glib2, mingw32-glib2, mingw64-glib2
    affected: workaround, no fix available
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.17 cert-manager/cert-manager-operator-rhel9 1791788287, cert-manager/jetstack-cert-manager-rhel9 1791371069, cert-manager/cert-manager-istio-csr-rhel9 1791378395, cert-manager/cert-manager-operator-bundle 1791970484, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791371080
    fixed: vendor fix RHSA-2026:82336
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.18 cert-manager/cert-manager-operator-rhel9 1789029076, cert-manager/jetstack-cert-manager-rhel9 1791459711, cert-manager/cert-manager-istio-csr-rhel9 1791459759, cert-manager/cert-manager-operator-bundle 1791966259, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791459707
    fixed: vendor fix RHSA-2026:82354
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.19 cert-manager/cert-manager-operator-rhel9 1788348522, cert-manager/jetstack-cert-manager-rhel9 1788348571, cert-manager/cert-manager-istio-csr-rhel9 1788348594, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1788348571
    fixed: vendor fix RHSA-2026:63140
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20 cert-manager/cert-manager-operator-rhel9 1790272426, cert-manager/cert-manager-operator-rhel9 1790589855, cert-manager/jetstack-cert-manager-rhel9 1790223279, cert-manager/jetstack-cert-manager-rhel9 1790589912, cert-manager/cert-manager-istio-csr-rhel9 1790223719, cert-manager/cert-manager-istio-csr-rhel9 1790589914, +2 more
    fixed: vendor fix RHSA-2026:72475
  • Red Hat AI Inference Server 3.2 rhaiis/vllm-cuda-rhel9 1790621718, rhaiis/vllm-rocm-rhel9 1790621713, rhaiis/model-opt-cuda-rhel9 1790621714
    fixed: vendor fix RHSA-2026:73859
  • Red Hat AI Inference Server 3.5 rhaii/vllm-cpu-rhel9 1791473614, rhaii/vllm-cuda-rhel9 1791473631, rhaii/vllm-rocm-rhel9 1791425869, rhaii/vllm-gaudi-rhel9 1791427182, rhaii/vllm-spyre-rhel9 1791818357, rhaii/model-opt-cuda-rhel9 1791803821
    fixed: vendor fix RHSA-2026:82066
show 30 more
  • Red Hat CodeReady Linux Builder EUS (v.9.6) glib2-static 2.68.4-16.el9_6.7, glib2-debuginfo 2.68.4-16.el9_6.7, glib2-debugsource 2.68.4-16.el9_6.7, glib2-devel-debuginfo 2.68.4-16.el9_6.7, glib2-tests-debuginfo 2.68.4-16.el9_6.7
    fixed: vendor fix RHSA-2026:65763
  • Red Hat Discovery 2 discovery/discovery-ui-rhel9 1788206196, discovery/discovery-server-rhel9 1788205779
    fixed: vendor fix RHSA-2026:61783
  • Red Hat Enterprise Linux AI 3.5 rhelai3/bootc-cuda-rhel9 1793135861, rhelai3/bootc-rocm-rhel9 1793135863, rhelai3/bootc-aws-cuda-rhel9 1793194817, rhelai3/bootc-gcp-cuda-rhel9 1793194815, rhelai3/disk-image-cuda-rhel9 1793206758, rhelai3/bootc-azure-cuda-rhel9 1793194815, +1 more
    fixed: vendor fix RHSA-2026:92452
  • Red Hat Enterprise Linux AppStream (v. 9) glib2-tests 2.68.4-19.el9_8.9
    fixed: vendor fix RHSA-2026:55440
  • Red Hat Enterprise Linux AppStream (v. 10) glib2-tests 2.80.4-12.el10_2.21
    fixed: vendor fix RHSA-2026:57015
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) glib2-tests 2.68.4-7.el9_2.7
    fixed: vendor fix RHSA-2026:65768
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) glib2-tests 2.68.4-14.el9_4.8
    fixed: vendor fix RHSA-2026:65770
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) glib2-tests 2.80.4-4.el10_0.17
    fixed: vendor fix RHSA-2026:65767
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) glib2-tests 2.68.4-16.el9_6.7
    fixed: vendor fix RHSA-2026:65763
  • Red Hat Enterprise Linux BaseOS (v. 8) glib2 2.56.4-177.el8_10, glib2-fam 2.56.4-177.el8_10, glib2-tests 2.56.4-177.el8_10
    fixed: vendor fix RHSA-2026:61766
  • Red Hat Enterprise Linux BaseOS (v. 9) glib2 2.68.4-19.el9_8.9
    fixed: vendor fix RHSA-2026:55440
  • Red Hat Enterprise Linux BaseOS (v. 10) glib2 2.80.4-12.el10_2.21
    fixed: vendor fix RHSA-2026:57015
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) glib2 2.56.4-10.el8_4.7, glib2-fam 2.56.4-10.el8_4.7, glib2-tests 2.56.4-10.el8_4.7
    fixed: vendor fix RHSA-2026:65762
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) glib2 2.56.4-158.el8_6.7, glib2-fam 2.56.4-158.el8_6.7, glib2-tests 2.56.4-158.el8_6.7
    fixed: vendor fix RHSA-2026:65769
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) glib2 2.56.4-165.el8_8.2, glib2-fam 2.56.4-165.el8_8.2, glib2-tests 2.56.4-165.el8_8.2
    fixed: vendor fix RHSA-2026:65771
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) glib2 2.68.4-7.el9_2.7
    fixed: vendor fix RHSA-2026:65768
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) glib2 2.68.4-14.el9_4.8
    fixed: vendor fix RHSA-2026:65770
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) glib2 2.80.4-4.el10_0.17
    fixed: vendor fix RHSA-2026:65767
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) glib2 2.68.4-16.el9_6.7
    fixed: vendor fix RHSA-2026:65763
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) glib2 2.56.4-10.el8_4.7, glib2-fam 2.56.4-10.el8_4.7, glib2-tests 2.56.4-10.el8_4.7
    fixed: vendor fix RHSA-2026:65762
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) glib2 2.56.4-158.el8_6.7, glib2-fam 2.56.4-158.el8_6.7, glib2-tests 2.56.4-158.el8_6.7
    fixed: vendor fix RHSA-2026:65769
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) glib2 2.56.4-165.el8_8.2, glib2-fam 2.56.4-165.el8_8.2, glib2-tests 2.56.4-165.el8_8.2
    fixed: vendor fix RHSA-2026:65771
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) glib2-static 2.68.4-19.el9_8.9, glib2-debuginfo 2.68.4-19.el9_8.9, glib2-debugsource 2.68.4-19.el9_8.9, glib2-devel-debuginfo 2.68.4-19.el9_8.9, glib2-tests-debuginfo 2.68.4-19.el9_8.9
    fixed: vendor fix RHSA-2026:55440
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) glib2-doc 2.80.4-12.el10_2.21, glib2-static 2.80.4-12.el10_2.21, glib2-debuginfo 2.80.4-12.el10_2.21, glib2-debugsource 2.80.4-12.el10_2.21, glib2-devel-debuginfo 2.80.4-12.el10_2.21, glib2-tests-debuginfo 2.80.4-12.el10_2.21
    fixed: vendor fix RHSA-2026:57015
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) glib2-doc 2.80.4-4.el10_0.17, glib2-static 2.80.4-4.el10_0.17, glib2-debuginfo 2.80.4-4.el10_0.17, glib2-debugsource 2.80.4-4.el10_0.17, glib2-devel-debuginfo 2.80.4-4.el10_0.17, glib2-tests-debuginfo 2.80.4-4.el10_0.17
    fixed: vendor fix RHSA-2026:65767
  • Red Hat Enterprise Linux CRB (v. 8) mingw-glib2 2.70.1-9.el8_10, mingw32-glib2 2.70.1-9.el8_10, mingw64-glib2 2.70.1-9.el8_10
    fixed: vendor fix RHSA-2026:61766
  • Red Hat Enterprise Linux Server (v. 7 ELS) glib2 2.56.1-13.el7_9.1 Red Hat Enterprise Linux Server Optional (v. 7 ELS) glib2-fam 2.56.1-13.el7_9.1, glib2-tests 2.56.1-13.el7_9.1
    fixed: vendor fix RHSA-2026:65773
  • Red Hat OpenShift AI 3.0 rhai/base-image-cpu-rhel9 1790277045, rhai/base-image-tpu-rhel9 1790276884, rhai/base-image-cuda-rhel9 1790276974, rhai/base-image-rocm-rhel9 1790276886, rhai/base-image-spyre-rhel9 1790276889
    fixed: vendor fix RHSA-2026:73960
  • Red Hat OpenShift AI 3.2 rhai/base-image-cpu-rhel9 1790703590, rhai/base-image-tpu-rhel9 1790703497, rhai/base-image-cuda-rhel9 1790703586, rhai/base-image-rocm-rhel9 1790703494, rhai/base-image-rocm-rhel9 1790703506, rhai/base-image-spyre-rhel9 1790703568
    fixed: vendor fix RHSA-2026:74460
  • Red Hat OpenShift AI 3.4 rhai/base-image-cpu-rhel9 1790703631, rhai/base-image-tpu-rhel9 1790703539, rhai/base-image-gaudi-rhel9 1790703553, rhai/base-image-spyre-rhel9 1790703597, rhai/base-image-neuron-rhel9 1790703542, rhai/base-image-rocm-6.4-rhel9 1790703545, +5 more
    fixed: vendor fix RHSA-2026:74679

2 more fixed, 4 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • gitlab.gnome.org https://gitlab.gnome.org/GNOME/glib/-/issues/3925 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
NVD 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
OSV 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia Glib_jll
<2.88.3+0
2.88.3+0

Affected products

  • GNOME GLib
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.17
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.18
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.19
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.20
  • Red Hat Red Hat AI Inference Server 3.2
  • Red Hat Red Hat AI Inference Server 3.5
  • Red Hat Red Hat Discovery 2
  • Red Hat Red Hat Enterprise Linux AI 3.5
  • Red Hat Red Hat OpenShift AI 3.0
  • Red Hat Red Hat OpenShift AI 3.2
  • Red Hat Red Hat OpenShift AI 3.4
  • Red Hat Red Hat OpenShift AI 3.5
  • Red Hat Red Hat Update Infrastructure 5
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat OpenShift AI (RHOAI)

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.