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CVE-2026-58010

Glib: buffer over-read in glib/gvariant-serialiser.c via gvs_tuple_is_normal()

Medium6.5EPSS 0.49%
Published
Updated
Reserved
Assigned by
redhat

Description

A flaw was found in GLib. An off-by-one error can occur in the gvs_tuple_is_normal function in the glib/gvariant-serialiser.c file when doing an alignment padding check because the bounds check uses > instead of >=, causing an out-of-bounds read of only 1 byte. This issue can cause a minor information disclosure of 1 byte and a denial of service when the out-of-bounds read crosses a page boundary.

Scores

CVSS scores of CVE-2026-58010, by who scored it
Scored byCVSSScoreVector
redhatCNA (assigner)3.1Medium6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
NVDNVD · Modified3.1High8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
EPSS (exploitation in 30 days)
0.49% · top 58% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

Affected products

What to do

Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

References (78)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .