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Fencer Vulns
medium 4.9

CVE-2009-1072 json

nfsd in the Linux kernel before 2.6.28.9 does not drop the CAP_MKNOD capability before handling a user request in a thread, which allows lo…

published 2009-03-25 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1073

cvss
4.9
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 37%
public exploits
0
none known

Summary

nfsd in the Linux kernel before 2.6.28.9 does not drop the CAP_MKNOD capability before handling a user request in a thread, which allows local users to create device nodes, as demonstrated on a filesystem that has been exported with the root_squash option.

Patch / fix

  • linux linux_kernel 2.6.28.9
  • kernel RHEL 4 2.6.9-89.0.3.EL
  • kernel-smp RHEL 4 2.6.9-89.0.3.EL
  • kernel-xenU RHEL 4 2.6.9-89.0.3.EL
  • kernel-hugemem RHEL 4 2.6.9-89.0.3.EL
  • kernel-largesmp RHEL 4 2.6.9-89.0.3.EL
  • kernel RHEL 5 2.6.18-128.1.14.el5
  • kernel-PAE RHEL 5 2.6.18-128.1.14.el5
  • kernel-xen RHEL 5 2.6.18-128.1.14.el5

red hat advisories RHSA-2009:1132RHSA-2009:1106RHSA-2009:1081

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-2009-1072 updated cvss 6.2

kernel: nfsd should drop CAP_MKNOD for non-root

  • Red Hat MRG Realtime for RHEL 5 Server kernel-rt 2.6.24.7-117.el5rt, kernel-rt-trace 2.6.24.7-117.el5rt, kernel-rt-vanilla 2.6.24.7-117.el5rt, kernel-rt-debuginfo-common 2.6.24.7-117.el5rt
    fixed: vendor fix RHSA-2009:1081
  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-128.1.14.el5, kernel-PAE 2.6.18-128.1.14.el5, kernel-xen 2.6.18-128.1.14.el5, kernel-kdump 2.6.18-128.1.14.el5, kernel-debuginfo-common 2.6.18-128.1.14.el5
    fixed: vendor fix RHSA-2009:1106
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-89.0.3.EL, kernel-smp 2.6.9-89.0.3.EL, kernel-xenU 2.6.9-89.0.3.EL, kernel-hugemem 2.6.9-89.0.3.EL, kernel-largesmp 2.6.9-89.0.3.EL
    fixed: vendor fix RHSA-2009:1132
  • Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-128.1.14.el5, kernel-PAE 2.6.18-128.1.14.el5, kernel-xen 2.6.18-128.1.14.el5, kernel-kdump 2.6.18-128.1.14.el5, kernel-debuginfo-common 2.6.18-128.1.14.el5
    fixed: vendor fix RHSA-2009:1106
  • Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-89.0.3.EL, kernel-smp 2.6.9-89.0.3.EL, kernel-xenU 2.6.9-89.0.3.EL, kernel-hugemem 2.6.9-89.0.3.EL, kernel-largesmp 2.6.9-89.0.3.EL Red Hat Enterprise Linux ES version 4 kernel 2.6.9-89.0.3.EL, kernel-smp 2.6.9-89.0.3.EL, kernel-xenU 2.6.9-89.0.3.EL, kernel-hugemem 2.6.9-89.0.3.EL, kernel-largesmp 2.6.9-89.0.3.EL Red Hat Enterprise Linux WS version 4 kernel 2.6.9-89.0.3.EL, kernel-smp 2.6.9-89.0.3.EL, kernel-xenU 2.6.9-89.0.3.EL, kernel-hugemem 2.6.9-89.0.3.EL, kernel-largesmp 2.6.9-89.0.3.EL
    fixed: vendor fix RHSA-2009:1132

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

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:C/A:N

Classification

Weakness
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.