glibc: buffer overflow (read past end of buffer) in internal_fnmatch=>end_pattern with "**(!()" pattern
Published Jun 25, 2023
6.2
MEDIUMCVSS 3.1
EPSS 0.32%
Description
end_pattern (called from internal_fnmatch) in the GNU C Library (aka glibc or libc6) before 2.22 might allow context-dependent attackers to cause a denial of service (application crash), as demonstrated by use of the fnmatch library function with the **(!() pattern. NOTE: this is not the same as CVE-2015-8984; also, some Linux distributions have fixed CVE-2015-8984 but have not fixed this additional fnmatch issue.
Affected products
No data.
No data.
Red Hat Enterprise Linux 6
compat-glibc
Not affected
Red Hat Enterprise Linux 6
glibc
Not affected
Red Hat Enterprise Linux 7
compat-glibc
Not affected
Red Hat Enterprise Linux 7
glibc
Not affected
Red Hat Enterprise Linux 8
glibc
Not affected
Red Hat Enterprise Linux 9
glibc
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | compat-glibc | Not affected | n/a |
| Red Hat Enterprise Linux 6 | glibc | Not affected | n/a |
| Red Hat Enterprise Linux 7 | compat-glibc | Not affected | n/a |
| Red Hat Enterprise Linux 7 | glibc | Not affected | n/a |
| Red Hat Enterprise Linux 8 | glibc | Not affected | n/a |
| Red Hat Enterprise Linux 9 | glibc | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Nov 27, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (7 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.32% (0.00317) | 22.32th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.29% (0.00292) | 20.66th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.02% (0.00024) | 3.84th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00055) | 24.84th | v3 (v2023.03.01) |
| Jun 9, 2024 | 0.04% (0.00044) | 12.59th | v3 (v2023.03.01) |
| Jul 6, 2023 | 0.04% (0.00044) | 10.57th | v3 (v2023.03.01) |
| Jun 26, 2023 | 0.04% (0.00043) | 7.04th | v3 (v2023.03.01) |
References (6)
- https://access.redhat.com/security/cve/CVE-2015-20109 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2217330 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-20109
- https://security.netapp.com/advisory/ntap-20230731-0009/
- https://sourceware.org/bugzilla/show_bug.cgi?id=18036 ExploitIssue Tracking
- https://www.cve.org/CVERecord?id=CVE-2015-20109
Change history (0)
No recorded changes yet.