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

mediumCVSS 6.5CVE-2026-58013

CSIRTS triage

vendor: null product: Glib Information disclosureaffected: null

What: This vulnerability involves a buffer over-read in the g_io_channel_read_line_backend function.
Who is affected: Deployments using the affected Glib library.
Urgency: Remediation is medium due to the severity rating of 6.5.
Action: Apply the patch for CVE-2026-58013.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 6.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58013

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-580130.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 33% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58013	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] Red Hat Enterprise Linux (glib2): Multiple vulnerabilitiescert-bund
unknownMultiple vulnerabilities in Microsoft Azure Linux (July 15, 2026)cert-fr-avis
mediumCVE-2026-58013: A flaw was found in GLib. A buffer over-read can occur in g_io_channel_read_line_backend() in …nvd

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