CVE-2026-58013

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

0.5% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-06-30 13:19 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-11-06 08:17 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.5% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-06-30 13:19 UTC

Last modified

2026-11-06 08:17 UTC

Exploit probability

0.5% · EPSS, next 30 days

Weakness

CWE-126

Record status

Modified

Affected

• Gnome Glib < 2.88.1
• Redhat Enterprise Linux 6.0
• Redhat Enterprise Linux 7.0
• Redhat Enterprise Linux 8.0
• Redhat Enterprise Linux 9.0
• Redhat Enterprise Linux 10.0

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-58013.md and follow it. Check whether this project is affected by CVE-2026-58013. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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