Qemu: pci: null pointer dereference issue
Published Oct 30, 2017
6.0
MEDIUMCVSS 3.0
EPSS 0.39%
Description
The MSI-X MMIO support in hw/pci/msix.c in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (NULL pointer dereference and QEMU process crash) by leveraging failure to define the .write method.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
kvm
Not affected
Red Hat Enterprise Linux 5
xen
Not affected
Red Hat Enterprise Linux 6
qemu-kvm
Not affected
Red Hat Enterprise Linux 7
qemu-kvm
Will not fix
Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)
qemu-kvm-rhev
Will not fix
Red Hat Enterprise Linux OpenStack Platform 6 (Juno)
qemu-kvm-rhev
Will not fix
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
qemu-kvm-rhev
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kvm | Not affected | n/a |
| Red Hat Enterprise Linux 5 | xen | Not affected | n/a |
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux 7 | qemu-kvm | Will not fix | n/a |
| Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) | qemu-kvm-rhev | Will not fix | n/a |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) | qemu-kvm-rhev | Will not fix | n/a |
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) | qemu-kvm-rhev | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the versions of the kvm and xen packages as shipped with Red Hat Enterprise Linux 5. This issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6, and the Red Hat Enterprise Linux 6 based versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3. This issue affects the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 7. This issue affects the Red Hat Enterprise Linux 7 based versions of the qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3. This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
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:H/UI:N/S:C/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 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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.39% (0.00392) | 30.93th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.38% (0.00377) | 29.29th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.12% (0.00118) | 28.23th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00062) | 28.60th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.06% (0.00062) | 26.61th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00062) | 24.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
References (10)
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=43b11a91dd861a946b231b89b754285 x_refsource_CONFIRM
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175380.html vendor-advisoryx_refsource_FEDORAIssue TrackingThird Party Advisory
- http://www.debian.org/security/2016/dsa-3471 vendor-advisoryx_refsource_DEBIANIssue TrackingThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/12/14/2 mailing-listx_refsource_MLISTIssue TrackingMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/80761 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2015-7549 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1291137 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-7549
- https://security.gentoo.org/glsa/201602-01 vendor-advisoryx_refsource_GENTOOIssue TrackingThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2015-7549
| Link | Providers | Tags |
|---|---|---|
| http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=43b11a91dd861a946b231b89b754285 | x_refsource_CONFIRM | |
| http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175380.html | vendor-advisoryx_refsource_FEDORAIssue TrackingThird Party Advisory | |
| http://www.debian.org/security/2016/dsa-3471 | vendor-advisoryx_refsource_DEBIANIssue TrackingThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2015/12/14/2 | mailing-listx_refsource_MLISTIssue TrackingMailing ListThird Party Advisory | |
| http://www.securityfocus.com/bid/80761 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2015-7549 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1291137 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-7549 | ||
| https://security.gentoo.org/glsa/201602-01 | vendor-advisoryx_refsource_GENTOOIssue TrackingThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2015-7549 |
Change history (0)
No recorded changes yet.