Skip to content
Fencer Vulns
medium 4.4

CVE-2009-1883 json

The z90crypt_unlocked_ioctl function in the z90crypt driver in the Linux kernel 2.6.9 does not perform a capability check for the Z90QUIESC…

published 2009-09-18 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1878

cvss
4.4
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

The z90crypt_unlocked_ioctl function in the z90crypt driver in the Linux kernel 2.6.9 does not perform a capability check for the Z90QUIESCE operation, which allows local users to leverage euid 0 privileges to force a driver outage.

Patch / fix

  • kernel RHEL 4 2.6.9-89.0.11.EL
  • kernel-smp RHEL 4 2.6.9-89.0.11.EL
  • kernel-xenU RHEL 4 2.6.9-89.0.11.EL
  • kernel-hugemem RHEL 4 2.6.9-89.0.11.EL
  • kernel-largesmp RHEL 4 2.6.9-89.0.11.EL

red hat advisories RHSA-2009:1438

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-1883 updated cvss 6.9

kernel: missing capability check in z90crypt

  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-89.0.11.EL, kernel-smp 2.6.9-89.0.11.EL, kernel-xenU 2.6.9-89.0.11.EL, kernel-hugemem 2.6.9-89.0.11.EL, kernel-largesmp 2.6.9-89.0.11.EL Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-89.0.11.EL, kernel-smp 2.6.9-89.0.11.EL, kernel-xenU 2.6.9-89.0.11.EL, kernel-hugemem 2.6.9-89.0.11.EL, kernel-largesmp 2.6.9-89.0.11.EL Red Hat Enterprise Linux ES version 4 kernel 2.6.9-89.0.11.EL, kernel-smp 2.6.9-89.0.11.EL, kernel-xenU 2.6.9-89.0.11.EL, kernel-hugemem 2.6.9-89.0.11.EL, kernel-largesmp 2.6.9-89.0.11.EL Red Hat Enterprise Linux WS version 4 kernel 2.6.9-89.0.11.EL, kernel-smp 2.6.9-89.0.11.EL, kernel-xenU 2.6.9-89.0.11.EL, kernel-hugemem 2.6.9-89.0.11.EL, kernel-largesmp 2.6.9-89.0.11.EL
    fixed: vendor fix RHSA-2009:1438

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 4.4 AV:L/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.