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Fencer Vulns
high 7.8

CVE-2009-1439 json

Buffer overflow in fs/cifs/connect.c in CIFS in the Linux kernel 2.6.29 and earlier allows remote attackers to cause a denial of service (c…

published 2009-04-27 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1437

cvss
7.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.3%
EPSS 4.3% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Buffer overflow in fs/cifs/connect.c in CIFS in the Linux kernel 2.6.29 and earlier allows remote attackers to cause a denial of service (crash) via a long nativeFileSystem field in a Tree Connect response to an SMB mount request.

Patch / fix

  • 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
  • kernel-kdump RHEL 5 2.6.18-128.1.14.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-128.1.14.el5
  • kernel RHEL 4 2.6.9-89.0.7.EL
  • kernel-smp RHEL 4 2.6.9-89.0.7.EL
  • kernel-xenU RHEL 4 2.6.9-89.0.7.EL

red hat advisories RHSA-2009:1106RHSA-2009:1211RHSA-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-2009-1439 updated cvss 7.1

kernel: cifs: memory overwrite when saving nativeFileSystem field during mount

  • 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 2.6.9-89.0.7.EL, kernel-smp 2.6.9-89.0.7.EL, kernel-xenU 2.6.9-89.0.7.EL, kernel-hugemem 2.6.9-89.0.7.EL, kernel-largesmp 2.6.9-89.0.7.EL
    fixed: vendor fix RHSA-2009:1211
  • 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-debuginfo-common 2.6.18-128.1.14.el5
    fixed: vendor fix RHSA-2009:1106
  • Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-89.0.7.EL, kernel-smp 2.6.9-89.0.7.EL, kernel-xenU 2.6.9-89.0.7.EL, kernel-hugemem 2.6.9-89.0.7.EL, kernel-largesmp 2.6.9-89.0.7.EL Red Hat Enterprise Linux ES version 4 kernel 2.6.9-89.0.7.EL, kernel-smp 2.6.9-89.0.7.EL, kernel-xenU 2.6.9-89.0.7.EL, kernel-hugemem 2.6.9-89.0.7.EL, kernel-largesmp 2.6.9-89.0.7.EL Red Hat Enterprise Linux WS version 4 kernel 2.6.9-89.0.7.EL, kernel-smp 2.6.9-89.0.7.EL, kernel-xenU 2.6.9-89.0.7.EL, kernel-hugemem 2.6.9-89.0.7.EL, kernel-largesmp 2.6.9-89.0.7.EL
    fixed: vendor fix RHSA-2009:1211

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

4.27% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
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.