The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in…
Priority LOW 35CWE-16Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
EPSS 0.02771 86th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
Red Hat 2 advisories
- RHSA-2010:0095 Released 2010-02-09 · Red Hat rating Importantrhev-hypervisor security and bug fix update
- Red Hat Enterprise Virtualization Hypervisor 5 rhev-hypervisor-5.4-2.1.8.el5_4rhev2_1, rhev-hypervisor-pxe-5.4-2.1.8.el5_4rhev2_1
- RHSA-2010:0088 Released 2010-02-09 · Red Hat rating Importantkvm security and bug fix update
- Red Hat Enterprise Linux Desktop Multi OS (v. 5 client) kmod-kvm-83-105.el5_4.22, kvm-83-105.el5_4.22, kvm-qemu-img-83-105.el5_4.22 +1
- Red Hat Enterprise Linux Virtualization (v. 5 server) kmod-kvm-83-105.el5_4.22, kvm-83-105.el5_4.22, kvm-qemu-img-83-105.el5_4.22 +1
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux Desktop Multi OS (v. 5 client) | Fixed | RHSA-2010:0088 |
| Red Hat Enterprise Linux Virtualization (v. 5 server) | Fixed | RHSA-2010:0088 |
| Red Hat Enterprise Virtualization Hypervisor 5 | Fixed | RHSA-2010:0095 |
Timeline
- 2026-10-02 Threatist record created from CVE-2010-0309
- 2026-10-03 Alias added: GHSA-wqgc-3hgm-hrw9
References
Patch 1
Advisory 3
Other 6
- ADV-2010-0638
- [oss-security] 20100202 Re: CVE request - kvm: cat /dev/port in the guest can cause host DoS
- oval:org.mitre.oval:def:11095
- https://bugzilla.redhat.com/show_bug.cgi?id=560887
- [oss-security] 20100202 CVE request - kvm: cat /dev/port in the guest can cause host DoS
- [kvm] 20100129 KVM: PIT: control word is write-only
More Linux Kernel vulnerabilities
- TI-2009-01318 Integer underflow in the e1000_clean_rx_irq function in drivers/net/e1000/e1000_main.c in… CVSS 2.0HIGH 7.8
- TI-2014-02132 Unspecified vulnerability in HP Operations Manager 9.20 on UNIX allows remote attackers… CVSS 2.0HIGH 7.5
- TI-2009-01322 Buffer overflow in the RTL8169 NIC driver (drivers/net/r8169.c) in the Linux kernel… CVSS 2.0HIGH 7.8
- TI-2009-02708 cfg80211 in net/wireless/scan.c in the Linux kernel 2.6.30-rc1 and other versions before… CVSS 2.0HIGH 7.8
- TI-2009-02633 The init_posix_timers function in kernel/posix-timers.c in the Linux kernel before… CVSS 2.0HIGH 7.2
- TI-2009-02296 Stack-based buffer overflow in the parse_tag_11_packet function in fs/ecryptfs/keystore.c… CVSS 2.0MEDIUM 6.9
Sources
- CVE-2010-0309 · CVE Program
- CVE-2010-0309 · NVD
- FIRST EPSS
- GHSA-wqgc-3hgm-hrw9 · GitHub Advisory Database · CC BY 4.0
- CVE-2010-0309 · Red Hat security data · CC BY 4.0
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