CVE-2026-58012
CVE-2026-58012: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityMedium6.5
Medium [CVE-2026-58012] buffer over-read in g_regex_replace via glib/gregex.c:string_append and g_utf8_next_char
CVE-2026-58012Source published Source updated
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. Any applications that use g_regex_replace() or g_regex_replace_eval() with the G_REGEX_RAW compile flag and allow user-controlled replacement strings containing case-change escapes (\u, \l, \U, \L) are vulnerable to this issue. Due to these reasons, this vulnerability has been rated with a moderate severity. Red Hat…
- Affected products in this advisory
- Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat Enterprise Linux 7 Extended Lifecycle Support
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
19 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- glib2-0:2.80.4-12.el10_2.21
- glib2-0:2.80.4-4.el10_0.17
- glib2-0:2.56.1-13.el7_9.1
- mingw-glib2-0:2.70.1-9.el8_10
46 more entries in the full advisory.
- Mitigation guidance
- To mitigate this vulnerability, implement strict input validation to sanitize user-supplied replacement strings, specifically rejecting or escaping case-change modifiers (\u, \l, \U, \L) before calling g_regex_replace() or g_regex_replace_eval() when the G_REGEX_RAW compile flag is used. Removing the G_REGEX_RAW flag or hardcoding the replacement strings will completely neutralize this issue.
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