libxml2: heap-based buffer overflow in xmlParseConditionalSections()
Published Nov 18, 2015
6.8
MEDIUMCVSS 2.0
EPSS 4.72%
Description
The xmlParseConditionalSections function in parser.c in libxml2 does not properly skip intermediary entities when it stops parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted XML data, a different vulnerability than CVE-2015-7941.
Affected products
No data.
Configuration 1
- 3.0
- 3.0
Configuration 2
- 7.0
- 8.0
Configuration 3
Configuration 4
- 12.04
- 14.04
- 15.04
- 15.10
No data.
Red Hat Enterprise Linux 6
libxml2-0:2.7.6-20.el6_7.1
Fixed · RHSA-2015:2549
Red Hat Enterprise Linux 7
libxml2-0:2.9.1-6.el7_2.2
Fixed · RHSA-2015:2550
Red Hat JBoss Web Server 3.0
libxml2
Fixed · RHSA-2016:1089
Red Hat Enterprise Linux 4
libxml2
Will not fix
Red Hat Enterprise Linux 5
libxml2
Will not fix
Red Hat JBoss Enterprise Web Server 2
libxml2
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | libxml2-0:2.7.6-20.el6_7.1 | Fixed | RHSA-2015:2549 |
| Red Hat Enterprise Linux 7 | libxml2-0:2.9.1-6.el7_2.2 | Fixed | RHSA-2015:2550 |
| Red Hat JBoss Web Server 3.0 | libxml2 | Fixed | RHSA-2016:1089 |
| Red Hat Enterprise Linux 4 | libxml2 | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | libxml2 | Will not fix | n/a |
| Red Hat JBoss Enterprise Web Server 2 | libxml2 | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:P/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
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.72% (0.04720) | 91.55th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.74% (0.04737) | 90.67th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.31% (0.01311) | 77.97th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.32% (0.07324) | 85.84th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.21% (0.01212) | 77.62th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.69% (0.00692) | 80.84th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.62% (0.00619) | 78.16th | v3 (v2023.03.01) |
| Jul 6, 2023 | 0.62% (0.00619) | 75.93th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.57% (0.00570) | 74.50th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
References (33)
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- http://lists.apple.com/archives/security-announce/2016/Mar/msg00001.html vendor-advisoryx_refsource_APPLEMailing ListThird Party Advisory
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- http://marc.info/?l=bugtraq&m=145382616617563&w=2 vendor-advisoryx_refsource_HPThird Party Advisory
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- http://rhn.redhat.com/errata/RHSA-2015-2550.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1089.html vendor-advisoryx_refsource_REDHAT
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- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html x_refsource_CONFIRM
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- http://www.securityfocus.com/bid/79507 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1034243 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-2812-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://xmlsoft.org/news.html x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2015-7942 Vendor Advisory
- https://bugzilla.gnome.org/show_bug.cgi?id=744980#c8 x_refsource_CONFIRMExploitIssue Tracking
- https://bugzilla.gnome.org/show_bug.cgi?id=756456 x_refsource_CONFIRMExploitIssue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=1276297 Issue Tracking
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04944172 x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-7942
- https://security.gentoo.org/glsa/201701-37 vendor-advisoryx_refsource_GENTOO
- https://support.apple.com/HT206166 x_refsource_CONFIRMVendor Advisory
- https://support.apple.com/HT206167 x_refsource_CONFIRMVendor Advisory
- https://support.apple.com/HT206168 x_refsource_CONFIRMVendor Advisory
- https://support.apple.com/HT206169 x_refsource_CONFIRMVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2015-7942
Change history (0)
No recorded changes yet.