CVE-2007-1189

CVE-2007-1189 is a high-severity vulnerability in Bell Labs Plan 9 with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Integer overflow in the envwrite function in the Alcatel-Lucent Bell Labs Plan 9 kernel allows local users to overwrite certain memory addresses with kernel memory via a large n argument, as demonstrated by (1) modifying the iseve function to gain privileges and (2) making the devpermcheck function grant unrestricted device permissions.

Frequently asked questions

What is CVE-2007-1189?
Integer overflow in the envwrite function in the Alcatel-Lucent Bell Labs Plan 9 kernel allows local users to overwrite certain memory addresses with kernel memory via a large n argument, as demonstrated by (1) modifying the iseve function to gain privileges and (2) making the devpermcheck function grant unrestricted device permissions.
How severe is CVE-2007-1189?
CVE-2007-1189 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2007-1189 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-1189?
CVE-2007-1189 affects Bell Labs Plan 9. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-1189?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2007-1189 published?
CVE-2007-1189 was published on 2007-03-02 and last updated on 2026-06-16.

References

Affected products (1)