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CVE Record

CVE-2026-58012: Glib: buffer over-read in g_regex_replace() via glib/gregex.c:string_append() and g_utf8_next_char()

A flaw was found in GLib. A buffer over-read can occur in the g_regex_replace function when used with the `G_REGEX_RAW` compile flag and case-change replacement escapes because the string_append function processes matched substrings using UTF-8 functions that assume valid UTF-8 input, even when the string is treated as raw bytes. This vulnerability can cause a minor information disclosure of 1-5 bytes and a denial of service when the buffer over-read crosses a page boundary.

MediumCVSS 6.5Not KEV-listedUpdated
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Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-126: Exact CWE lookup

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Container behavior lookup

The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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CVE-2026-58012 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
5Timeline events
1ADP providers
41Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L3.92.5redhat

Vulnerability scoring details

Base CVSS 3.1 score

6.5Medium
CVSS 3.1 vector shape for CVE-2026-58012Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timelineredhat

    Made public.

  2. Source timelineredhat

    Reported to Red Hat.

  3. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
GNOMEGLibGLib, 0, 0unaffected
Red HatRed Hat Enterprise Linux 10glib2, 0:2.80.4-12.el10_2.21affected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Supportglib2, 0:2.80.4-4.el10_0.17affected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Supportglib2, 0:2.56.1-13.el7_9.1affected
Red HatRed Hat Enterprise Linux 8mingw-glib2, 0:2.70.1-9.el8_10affected
Red HatRed Hat Enterprise Linux 8glib2, 0:2.56.4-177.el8_10affected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportglib2, 0:2.56.4-10.el8_4.7affected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onglib2, 0:2.56.4-10.el8_4.7affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportglib2, 0:2.56.4-158.el8_6.7affected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onglib2, 0:2.56.4-158.el8_6.7affected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Serviceglib2, 0:2.56.4-165.el8_8.2affected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutionsglib2, 0:2.56.4-165.el8_8.2affected
Red HatRed Hat Enterprise Linux 9glib2, 0:2.68.4-19.el9_8.9affected
Red HatRed Hat Enterprise Linux 9glib2, 0:2.68.4-19.el9_8.9affected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutionsglib2, 0:2.68.4-7.el9_2.7affected
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutionsglib2, 0:2.68.4-14.el9_4.8affected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Supportglib2, 0:2.68.4-16.el9_6.7affected
Red HatCert Manager support for Red Hat OpenShift release 1.17cert-manager/jetstack-cert-manager-acmesolver-rhel9, 1791371080affected
Red HatCert Manager support for Red Hat OpenShift release 1.17cert-manager/jetstack-cert-manager-rhel9, 1791371069affected
Red HatCert Manager support for Red Hat OpenShift release 1.17cert-manager/cert-manager-operator-rhel9, 1791788287affected
Red HatCert Manager support for Red Hat OpenShift release 1.17cert-manager/cert-manager-istio-csr-rhel9, 1791378395affected
Red HatCert Manager support for Red Hat OpenShift release 1.17cert-manager/cert-manager-operator-bundle, 1791970484affected
Red HatCert Manager support for Red Hat OpenShift release 1.18cert-manager/jetstack-cert-manager-acmesolver-rhel9, 1791459707affected
Red HatCert Manager support for Red Hat OpenShift release 1.18cert-manager/jetstack-cert-manager-rhel9, 1791459711affected
Red HatCert Manager support for Red Hat OpenShift release 1.18cert-manager/cert-manager-istio-csr-rhel9, 1791459759affected
Red HatCert Manager support for Red Hat OpenShift release 1.18cert-manager/cert-manager-operator-rhel9, 1789029076affected
Red HatCert Manager support for Red Hat OpenShift release 1.18cert-manager/cert-manager-operator-bundle, 1791966259affected
Red HatCert Manager support for Red Hat OpenShift release 1.19cert-manager/cert-manager-operator-rhel9, 1788348522affected
Red HatCert Manager support for Red Hat OpenShift release 1.19cert-manager/jetstack-cert-manager-acmesolver-rhel9, 1788348571affected
Red HatCert Manager support for Red Hat OpenShift release 1.19cert-manager/jetstack-cert-manager-rhel9, 1788348571affected
Weakness

CWE details

CWE-126

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-126 · source CWE mapping

Buffer Over-read

Buffer Over-read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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