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Enterprise Linux CVE-2026-58012

| EUVDEUVD-2026-40314 HIGH
Buffer Over-read (CWE-126)
2026-06-30 secalert@redhat.com GHSA-vwg8-37h9-g38g
8.2
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
8.2 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
vuln.today AI
4.8 MEDIUM

AV:N since input can be remote, but AC:H because the vulnerable G_REGEX_RAW-plus-case-escape path is non-default and the page-crossing crash is probabilistic; C:L for the 1-5 byte leak, A:L as DoS is conditional not guaranteed.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
SUSE
4.4 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
Red Hat
6.5 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

Lifecycle Timeline

7
Analysis Updated
Jul 02, 2026 - 19:46 vuln.today
v3 (cvss_changed)
Analysis Updated
Jul 02, 2026 - 19:46 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Jul 02, 2026 - 19:37 vuln.today
cvss_changed
Severity Changed
Jul 02, 2026 - 19:37 NVD
MEDIUM HIGH
CVSS changed
Jul 02, 2026 - 19:37 NVD
6.5 (MEDIUM) 8.2 (HIGH)
Patch available
Jun 30, 2026 - 16:01 EUVD
Analysis Generated
Jun 30, 2026 - 13:36 vuln.today

DescriptionNVD

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.

AnalysisAI

Buffer over-read in GNOME GLib's g_regex_replace() lets remote attackers leak 1-5 adjacent bytes of process memory and crash applications when regex replacement is performed with the G_REGEX_RAW compile flag combined with case-change replacement escapes. The internal string_append helper applies UTF-8 aware routines to matched substrings even though G_REGEX_RAW treats the buffer as raw bytes, reading past the intended boundary. There is no public exploit identified at time of analysis and EPSS is low (0.26%, 18th percentile), but the flaw is broadly reachable because GLib underpins the GNOME stack and ships across Red Hat Enterprise Linux 6-10.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
Container suse/sles/16.0/toolbox:latest Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Fixed

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CVE-2026-58012 vulnerability details – vuln.today

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