libxml2: infinite loop in xz_decomp function in xzlib.c
Published Apr 4, 2018
5.3
MEDIUMCVSS 3.0
EPSS 2.36%
Description
The xz_decomp function in xzlib.c in libxml2 2.9.8, if --with-lzma is used, allows remote attackers to cause a denial of service (infinite loop) via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint, a different vulnerability than CVE-2015-8035.
Affected products
No data.
Configuration 2
- 8.0
No data.
Red Hat Enterprise Linux 8
libxml2-0:2.9.7-7.el8
Fixed · RHSA-2020:1827
Red Hat Enterprise Linux 8
libxml2-0:2.9.7-7.el8
Fixed · RHSA-2020:1827
Red Hat Enterprise Linux 5
libxml2
Not affected
Red Hat Enterprise Linux 6
libxml2
Not affected
Red Hat Enterprise Linux 7
libxml2
Not affected
Red Hat JBoss Core Services
libxml2
Not affected
Red Hat JBoss Web Server 3
libxml2
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | libxml2-0:2.9.7-7.el8 | Fixed | RHSA-2020:1827 |
| Red Hat Enterprise Linux 8 | libxml2-0:2.9.7-7.el8 | Fixed | RHSA-2020:1827 |
| Red Hat Enterprise Linux 5 | libxml2 | Not affected | n/a |
| Red Hat Enterprise Linux 6 | libxml2 | Not affected | n/a |
| Red Hat Enterprise Linux 7 | libxml2 | Not affected | n/a |
| Red Hat JBoss Core Services | libxml2 | Not affected | n/a |
| Red Hat JBoss Web Server 3 | libxml2 | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of libxml2 as shipped with Red Hat Enterprise Linux 5, 6, and 7.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
AV:N/AC:H/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.36% (0.02357) | 83.13th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.44% (0.02440) | 82.12th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.35% (0.00348) | 54.30th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.93% (0.04935) | 82.35th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.16% (0.00162) | 53.21th | v3 (v2023.03.01) |
| Feb 12, 2024 | 0.16% (0.00162) | 51.51th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.15% (0.00148) | 49.94th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.12% (0.00121) | 44.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.98% (0.00976) | 26.54th | v1 |
| Jan 6, 2022 | 0.98% (0.00976) | 25.91th | v1 |
| Sep 1, 2021 | 0.98% (0.00976) | 61.78th | v1 |
| Apr 14, 2021 | 0.98% (0.00976) | 0.00th | v1 |
References (6)
- https://access.redhat.com/security/cve/CVE-2018-9251 Vendor Advisory
- https://bugzilla.gnome.org/show_bug.cgi?id=794914 x_refsource_MISCExploitIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1565318 Issue Tracking
- https://lists.debian.org/debian-lts-announce/2018/09/msg00035.html mailing-listx_refsource_MLISTThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-9251
- https://www.cve.org/CVERecord?id=CVE-2018-9251
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2018-9251 | Vendor Advisory | |
| https://bugzilla.gnome.org/show_bug.cgi?id=794914 | x_refsource_MISCExploitIssue TrackingThird Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1565318 | Issue Tracking | |
| https://lists.debian.org/debian-lts-announce/2018/09/msg00035.html | mailing-listx_refsource_MLISTThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-9251 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-9251 |
Change history (0)
No recorded changes yet.