CVE-2026-58012
Glib: buffer over-read in g_regex_replace() via glib/gregex.c:string_append() and g_utf8_next_char()
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L |
| NVDNVD · Modified | 3.1 | High8.2 | CVSS: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
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
- affected < 2.86.5
- affected < 2.88.1
Red Hat · Red Hat Enterprise Linux 10
- unaffected 0:2.80.4-12.el10_2.21 – < *
Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support
- unaffected 0:2.80.4-4.el10_0.17 – < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support
- unaffected 0:2.56.1-13.el7_9.1 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:2.70.1-9.el8_10 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:2.56.4-177.el8_10 – < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- unaffected 0:2.56.4-10.el8_4.7 – < *
Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
- unaffected 0:2.56.4-10.el8_4.7 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
- unaffected 0:2.56.4-158.el8_6.7 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
- unaffected 0:2.56.4-158.el8_6.7 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service
- unaffected 0:2.56.4-165.el8_8.2 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
- unaffected 0:2.56.4-165.el8_8.2 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:2.68.4-19.el9_8.9 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:2.68.4-19.el9_8.9 – < *
Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- unaffected 0:2.68.4-7.el9_2.7 – < *
Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
- unaffected 0:2.68.4-14.el9_4.8 – < *
Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support
- unaffected 0:2.68.4-16.el9_6.7 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.17
- unaffected 1791371080 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.17
- unaffected 1791371069 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.17
- unaffected 1791788287 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.17
- unaffected 1791378395 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.17
- unaffected 1791970484 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.18
- unaffected 1791459707 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.18
- unaffected 1791459711 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.18
- unaffected 1791459759 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.18
- unaffected 1789029076 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.18
- unaffected 1791966259 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.19
- unaffected 1788348522 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.19
- unaffected 1788348571 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.19
- unaffected 1788348571 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.19
- unaffected 1788348594 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.20
- unaffected 1790223279 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.20
- unaffected 1790223719 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.20
- unaffected 1790272426 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.20
- unaffected 1790589998 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.20
- unaffected 1790589912 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.20
- unaffected 1790589914 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.20
- unaffected 1790589855 – < *
Red Hat · Cert Manager support for Red Hat OpenShift release 1.20
- unaffected 1790598593 – < *
Red Hat · Red Hat AI Inference Server 3.2
- unaffected 1790621714 – < *
Red Hat · Red Hat AI Inference Server 3.2
- unaffected 1790621718 – < *
Red Hat · Red Hat AI Inference Server 3.2
- unaffected 1790621713 – < *
Red Hat · Red Hat AI Inference Server 3.5
- unaffected 1791425869 – < *
Red Hat · Red Hat AI Inference Server 3.5
- unaffected 1791427182 – < *
Red Hat · Red Hat AI Inference Server 3.5
- unaffected 1791803821 – < *
Red Hat · Red Hat AI Inference Server 3.5
- unaffected 1791473631 – < *
Red Hat · Red Hat AI Inference Server 3.5
- unaffected 1791818357 – < *
Red Hat · Red Hat AI Inference Server 3.5
- unaffected 1791473614 – < *
- unaffected 1788205779 – < *
- unaffected 1788206196 – < *
Red Hat · Red Hat Enterprise Linux AI 3.5
- unaffected 1793206758 – < *
Red Hat · Red Hat Enterprise Linux AI 3.5
- unaffected 1793194817 – < *
Red Hat · Red Hat Enterprise Linux AI 3.5
- unaffected 1793194815 – < *
Red Hat · Red Hat Enterprise Linux AI 3.5
- unaffected 1793194834 – < *
Red Hat · Red Hat Enterprise Linux AI 3.5
- unaffected 1793135861 – < *
Red Hat · Red Hat Enterprise Linux AI 3.5
- unaffected 1793194815 – < *
Red Hat · Red Hat Enterprise Linux AI 3.5
- unaffected 1793135863 – < *
Red Hat · Red Hat OpenShift AI 3.0
- unaffected 1790276886 – < *
Red Hat · Red Hat OpenShift AI 3.0
- unaffected 1790276884 – < *
Red Hat · Red Hat OpenShift AI 3.0
- unaffected 1790277045 – < *
Red Hat · Red Hat OpenShift AI 3.0
- unaffected 1790276889 – < *
Red Hat · Red Hat OpenShift AI 3.0
- unaffected 1790276974 – < *
Red Hat · Red Hat OpenShift AI 3.2
- unaffected 1790703497 – < *
Red Hat · Red Hat OpenShift AI 3.2
- unaffected 1790703506 – < *
Red Hat · Red Hat OpenShift AI 3.2
- unaffected 1790703590 – < *
Red Hat · Red Hat OpenShift AI 3.2
- unaffected 1790703568 – < *
Red Hat · Red Hat OpenShift AI 3.2
- unaffected 1790703586 – < *
Red Hat · Red Hat OpenShift AI 3.2
- unaffected 1790703494 – < *
Red Hat · Red Hat OpenShift AI 3.4
- unaffected 1790703542 – < *
Red Hat · Red Hat OpenShift AI 3.4
- unaffected 1790703539 – < *
Red Hat · Red Hat OpenShift AI 3.4
- unaffected 1790703553 – < *
Red Hat · Red Hat OpenShift AI 3.4
- unaffected 1790703631 – < *
Red Hat · Red Hat OpenShift AI 3.4
- unaffected 1790703597 – < *
Red Hat · Red Hat OpenShift AI 3.4
- unaffected 1790703641 – < *
Red Hat · Red Hat OpenShift AI 3.4
- unaffected 1790703630 – < *
Red Hat · Red Hat OpenShift AI 3.4
- unaffected 1790703541 – < *
Red Hat · Red Hat OpenShift AI 3.4
- unaffected 1790703545 – < *
Red Hat · Red Hat OpenShift AI 3.4
- unaffected 1791231926 – < *
Red Hat · Red Hat OpenShift AI 3.4
- unaffected 1791232048 – < *
Red Hat · Red Hat OpenShift AI 3.5
- unaffected 1790703552 – < *
Red Hat · Red Hat OpenShift AI 3.5
- unaffected 1790703656 – < *
Red Hat · Red Hat OpenShift AI 3.5
- unaffected 1790703557 – < *
Red Hat · Red Hat OpenShift AI 3.5
- unaffected 1790703707 – < *
Red Hat · Red Hat OpenShift AI 3.5
- unaffected 1790703645 – < *
Red Hat · Red Hat OpenShift AI 3.5
- unaffected 1790703554 – < *
Red Hat · Red Hat OpenShift AI 3.5
- unaffected 1790703554 – < *
Red Hat · Red Hat OpenShift AI 3.5
- unaffected 1790703630 – < *
Red Hat · Red Hat OpenShift AI 3.5
- unaffected 1790703706 – < *
Red Hat · Red Hat Update Infrastructure 5
- unaffected 1787241211 – < *
Red Hat · Red Hat Update Infrastructure 5
- unaffected 1787135742 – < *
Red Hat · Red Hat Update Infrastructure 5
- unaffected 1787241260 – < *
Red Hat · Red Hat Update Infrastructure 5
- unaffected 1788880445 – < *
Red Hat · Red Hat Update Infrastructure 5
- unaffected 1788880464 – < *
Red Hat · Red Hat Update Infrastructure 5
- unaffected 1788880456 – < *
Red Hat · Red Hat Update Infrastructure 5
- unaffected 1788765051 – < *
Red Hat · Red Hat Update Infrastructure 5
- unaffected 1788880581 – < *
Red Hat · Red Hat Enterprise Linux 10
All versions: affected
Red Hat · Red Hat Enterprise Linux 6
All versions: affected
Red Hat · Red Hat Enterprise Linux 9
All versions: affected
Red Hat · Red Hat Hardened Images
All versions: unaffected
Red Hat · Red Hat OpenShift AI (RHOAI)
All versions: unaffected
What to do
Workaround: 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.
References (78)
- RHSA-2026:49512 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:55440 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:57015 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:58981 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:61766 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:61783 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:63135 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:63138 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:63140 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:65762 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:65763 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:65767 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:65768 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:65769 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:65770 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:65771 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:65773 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:66018 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:72394 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:72395 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:72399 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:72470 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:72475 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:72476 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:72502 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:73859 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:73909 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:73929 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:73930 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:73959 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:73960 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:73961 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:73962 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74458 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74459 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74460 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74461 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74462 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74463 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74674 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74677 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74678 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74679 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74681 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74683 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74685 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74687 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74688 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:74771 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:75652 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:75654 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:75655 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:75657 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:75658 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:75659 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:75660 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:76042 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:80769 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:80771 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82059 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82061 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82066 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82304 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82322 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82336 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82347 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82354 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82368 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82371 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82372 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82415 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82857 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:82888 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:92449 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:92452 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-58012 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2492247 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://gitlab.gnome.org/GNOME/glib/-/issues/3918 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-58012)Record last updated .