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MEDIUM

CVE-2026-58013

CVSS v3

6.5

MEDIUM

EPSS Score

0.5 %

exploit probability, as of 2026-10-17

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • glib2AlmaLinux:10all versions · fixed in 2.80.4-12.el10_2.21and 4 other packages
  • glib2AlmaLinux:9all versions · fixed in 2.68.4-19.el9_8.9and 4 other packages
  • glib2AlmaLinux:8all versions · fixed in 2.56.4-177.el8_10and 5 other packages
  • mingw32-glib2AlmaLinux:8all versions · fixed in 2.70.1-9.el8_10and 3 other packages

Vendor advisories

  • CVE-2026-58013 Red Hat Product Security815 products fixed · 15 known affected

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

    mingw-glib2.src as a component of Red Hat Enterprise Linux 10 · mingw32-glib2 as a component of Red Hat Enterprise Linux 10 · mingw32-glib2-static as a component of Red Hat Enterprise Linux 10

  • RHSA-2026:82888 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2

  • RHSA-2026:82857 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2

  • RHSA-2026:82415 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (cpu)

  • RHSA-2026:82371 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (spyre)

  • RHSA-2026:82368 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: Red Hat AI Inference 3.5.2 (cuda)

65 more advisories

Full record on NVD

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Published
2026-06-30
Last Modified
2026-06-30
MSRC Title
Glib: buffer over-read in glib/giochannel.c via "g_io_channel_read_line_backend"

Frequently asked questions

What is CVE-2026-58013?

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.

Is CVE-2026-58013 actively exploited?

Active exploitation of CVE-2026-58013 has not been confirmed. Its EPSS score was 0.5% on 2026-10-17, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-58013?

CVE-2026-58013 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.

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