kvm: cat /dev/port in guest cause the host hang
Published Feb 12, 2010
6.8
MEDIUMCVSS 2.0
EPSS 2.77%
Description
The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in i8254.c in KVM 83 does not properly use the pit_state data structure, which allows guest OS users to cause a denial of service (host OS crash or hang) by attempting to read the /dev/port file.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
kvm-0:83-105.el5_4.22
Fixed · RHSA-2010:0088
Red Hat Enterprise Virtualization for RHEL-5
rhev-hypervisor-0:5.4-2.1.8.el5_4rhev2_1
Fixed · RHSA-2010:0095
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kvm-0:83-105.el5_4.22 | Fixed | RHSA-2010:0088 |
| Red Hat Enterprise Virtualization for RHEL-5 | rhev-hypervisor-0:5.4-2.1.8.el5_4rhev2_1 | Fixed | RHSA-2010:0095 |
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:L/Au:S/C:N/I:N/A:C
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 | 2.77% (0.02771) | 85.80th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.70% (0.02696) | 83.91th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.74% (0.00743) | 71.28th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.35% (0.00350) | 72.67th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.35% (0.00351) | 71.08th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.35% (0.00351) | 67.37th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
References (16)
- http://secunia.com/advisories/38492 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/38922 third-party-advisoryx_refsource_SECUNIA
- http://www.debian.org/security/2010/dsa-1996 vendor-advisoryx_refsource_DEBIAN
- http://www.mail-archive.com/kvm%40vger.kernel.org/msg28002.html mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2010/02/02/1 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2010/02/02/4 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/38158 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-914-1 vendor-advisoryx_refsource_UBUNTU
- http://www.vupen.com/english/advisories/2010/0638 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2010-0309 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=560887 x_refsource_CONFIRMIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2010-0309
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11095 vdb-entrysignaturex_refsource_OVAL
- https://rhn.redhat.com/errata/RHSA-2010-0088.html vendor-advisoryx_refsource_REDHATVendor Advisory
- https://rhn.redhat.com/errata/RHSA-2010-0095.html vendor-advisoryx_refsource_REDHATPatchVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2010-0309
Change history (0)
No recorded changes yet.