Skip to content
Fencer Vulns
medium 4.7

CVE-2009-2849 json

The md driver (drivers/md/md.c) in the Linux kernel before 2.6.30.2 might allow local users to cause a denial of service (NULL pointer dere…

published 2009-08-18 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-2839

cvss
4.7
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 41%
public exploits
0
none known

Summary

The md driver (drivers/md/md.c) in the Linux kernel before 2.6.30.2 might allow local users to cause a denial of service (NULL pointer dereference) via vectors related to "suspend_* sysfs attributes" and the (1) suspend_lo_store or (2) suspend_hi_store functions. NOTE: this is only a vulnerability when sysfs is writable by an attacker.

Patch / fix

  • kernel-rt enterprise mrg 1 2.6.24.7-137.el5rt
  • kernel-rt-trace enterprise mrg 1 2.6.24.7-137.el5rt
  • kernel-rt-vanilla enterprise mrg 1 2.6.24.7-137.el5rt
  • kernel-rt-debuginfo-common enterprise mrg 1 2.6.24.7-137.el5rt
  • kernel RHEL 5 2.6.18-164.2.1.el5
  • kernel-PAE RHEL 5 2.6.18-164.2.1.el5
  • kernel-xen RHEL 5 2.6.18-164.2.1.el5
  • kernel-kdump RHEL 5 2.6.18-164.2.1.el5

red hat advisories RHSA-2009:1540RHSA-2009:1455

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-2009-2849 updated cvss 6.2

kernel: md: NULL pointer deref when accessing suspend_* sysfs attributes

  • Red Hat MRG Realtime for RHEL 5 Server kernel-rt 2.6.24.7-137.el5rt, kernel-rt-trace 2.6.24.7-137.el5rt, kernel-rt-vanilla 2.6.24.7-137.el5rt, kernel-rt-debuginfo-common 2.6.24.7-137.el5rt
    fixed: vendor fix RHSA-2009:1540
  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-164.2.1.el5, kernel-PAE 2.6.18-164.2.1.el5, kernel-xen 2.6.18-164.2.1.el5, kernel-kdump 2.6.18-164.2.1.el5, kernel-debuginfo-common 2.6.18-164.2.1.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-164.2.1.el5, kernel-PAE 2.6.18-164.2.1.el5, kernel-xen 2.6.18-164.2.1.el5, kernel-kdump 2.6.18-164.2.1.el5, kernel-debuginfo-common 2.6.18-164.2.1.el5
    fixed: vendor fix RHSA-2009:1455

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

0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • xorl.wordpress.com http://xorl.wordpress.com/2009/07/21/linux-kernel-md-driver-null-pointer-dereference/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.7 AV:L/AC:M/Au:N/C:N/I:N/A:C

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.