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Fencer Vulns
medium 6.4

CVE-2004-1056 json

Direct Rendering Manager (DRM) driver in Linux kernel 2.6 does not properly check the DMA lock, which could allow remote attackers or local…

published 2004-12-22 21 y ago modified 2026-06-16 4 mo ago also EUVD-2004-1054

cvss
6.4
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.3%
EPSS 3.3% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

Direct Rendering Manager (DRM) driver in Linux kernel 2.6 does not properly check the DMA lock, which could allow remote attackers or local users to cause a denial of service (X Server crash) and possibly modify the video output.

Patch / fix

  • kernel RHEL 4 2.6.9-5.0.3.EL
  • kernel-smp RHEL 4 2.6.9-5.0.3.EL
  • kernel-hugemem RHEL 4 2.6.9-5.0.3.EL
  • kernel RHEL 3 2.4.21-37.EL
  • kernel-smp RHEL 3 2.4.21-37.EL
  • kernel-BOOT RHEL 3 2.4.21-37.EL
  • kernel-source RHEL 3 2.4.21-37.EL
  • kernel-hugemem RHEL 3 2.4.21-37.EL

red hat advisories RHSA-2005:092RHSA-2005:663

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-2004-1056 updated

security flaw

  • Red Hat Desktop version 3 kernel 2.4.21-37.EL, kernel-smp 2.4.21-37.EL, kernel-BOOT 2.4.21-37.EL, kernel-source 2.4.21-37.EL, kernel-hugemem 2.4.21-37.EL, kernel-unsupported 2.4.21-37.EL, +2 more Red Hat Enterprise Linux AS version 3 kernel 2.4.21-37.EL, kernel-smp 2.4.21-37.EL, kernel-BOOT 2.4.21-37.EL, kernel-source 2.4.21-37.EL, kernel-hugemem 2.4.21-37.EL, kernel-unsupported 2.4.21-37.EL, +2 more
    fixed: vendor fix RHSA-2005:663
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-5.0.3.EL, kernel-smp 2.6.9-5.0.3.EL, kernel-hugemem 2.6.9-5.0.3.EL Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-5.0.3.EL, kernel-smp 2.6.9-5.0.3.EL, kernel-hugemem 2.6.9-5.0.3.EL
    fixed: vendor fix RHSA-2005:092
  • Red Hat Enterprise Linux ES version 2.1
    fixed: vendor fix RHSA-2005:529
  • Red Hat Enterprise Linux ES version 3 kernel 2.4.21-37.EL, kernel-smp 2.4.21-37.EL, kernel-BOOT 2.4.21-37.EL, kernel-source 2.4.21-37.EL, kernel-hugemem 2.4.21-37.EL, kernel-unsupported 2.4.21-37.EL, +2 more
    fixed: vendor fix RHSA-2005:663
  • Red Hat Enterprise Linux ES version 4 kernel 2.6.9-5.0.3.EL, kernel-smp 2.6.9-5.0.3.EL, kernel-hugemem 2.6.9-5.0.3.EL
    fixed: vendor fix RHSA-2005:092
  • Red Hat Enterprise Linux WS version 2.1
    fixed: vendor fix RHSA-2005:529
  • Red Hat Enterprise Linux WS version 3 kernel 2.4.21-37.EL, kernel-smp 2.4.21-37.EL, kernel-BOOT 2.4.21-37.EL, kernel-source 2.4.21-37.EL, kernel-hugemem 2.4.21-37.EL, kernel-unsupported 2.4.21-37.EL, +2 more
    fixed: vendor fix RHSA-2005:663
  • Red Hat Enterprise Linux WS version 4 kernel 2.6.9-5.0.3.EL, kernel-smp 2.6.9-5.0.3.EL, kernel-hugemem 2.6.9-5.0.3.EL
    fixed: vendor fix RHSA-2005:092
show 1 more
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2005:551

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

3.27% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:N/I:P/A:P

Classification

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.