Qemu: Integer overflow in ccid_card_vscard_read() allows memory corruption
Published Oct 19, 2018
5.5
MEDIUMCVSS 3.0
EPSS 0.44%
Description
Qemu has integer overflows because IOReadHandler and its associated functions use a signed integer data type for a size value.
Affected products
No data.
Configuration 2
- 6.0
- 7.0
No data.
Red Hat Enterprise Linux 6
qemu-kvm
Not affected
Red Hat Enterprise Linux 7
qemu-kvm
Not affected
Red Hat Enterprise Linux 7
qemu-kvm-ma
Not affected
Red Hat Enterprise Linux 7
qemu-kvm-rhev
Not affected
Red Hat Enterprise Linux 8
qemu-kvm
Not affected
Red Hat OpenStack Platform 10 (Newton)
qemu-kvm-rhev
Not affected
Red Hat OpenStack Platform 12 (Pike)
qemu-kvm-rhev
Not affected
Red Hat OpenStack Platform 13 (Queens)
qemu-kvm-rhev
Not affected
Red Hat OpenStack Platform 14 (Rocky)
qemu-kvm-rhev
Not affected
Red Hat OpenStack Platform 8 (Liberty)
qemu-kvm-rhev
Not affected
Red Hat OpenStack Platform 9 (Mitaka)
qemu-kvm-rhev
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm-ma | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm-rhev | Not affected | n/a |
| Red Hat Enterprise Linux 8 | qemu-kvm | Not affected | n/a |
| Red Hat OpenStack Platform 10 (Newton) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat OpenStack Platform 12 (Pike) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat OpenStack Platform 13 (Queens) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat OpenStack Platform 14 (Rocky) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat OpenStack Platform 8 (Liberty) | qemu-kvm-rhev | Not affected | n/a |
| Red Hat OpenStack Platform 9 (Mitaka) | qemu-kvm-rhev | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
The maintainer audited the code and determined that no memory corruption is possible using this flaw. Patches were applied upstream to prevent future changes introducing such flaws, but the issues identified by this CVE were determined to not constitute a vulnerability.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AV:L/AC:L/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 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.44% (0.00443) | 36.31th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.44% (0.00443) | 37.94th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.06% (0.00059) | 25.56th | v3 (v2023.03.01) |
| Jun 27, 2024 | 0.06% (0.00059) | 25.26th | v3 (v2023.03.01) |
| Oct 13, 2023 | 0.06% (0.00059) | 23.25th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.71th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00950) | 13.46th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (8)
- http://www.openwall.com/lists/oss-security/2018/10/17/3 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/105953 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-18438 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1609015 Issue Tracking
- https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02396.html mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02402.html mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-18438
- https://www.cve.org/CVERecord?id=CVE-2018-18438
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2018/10/17/3 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://www.securityfocus.com/bid/105953 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2018-18438 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1609015 | Issue Tracking | |
| https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02396.html | mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory | |
| https://lists.gnu.org/archive/html/qemu-devel/2018-10/msg02402.html | mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-18438 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-18438 |
Change history (0)
No recorded changes yet.