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Fencer Vulns
medium 4.6

CVE-2006-1864 json

Directory traversal vulnerability in smbfs in Linux 2.6.16 and earlier allows local users to escape chroot restrictions for an SMB-mounted…

published 2006-04-26 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-1864

cvss
4.6
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
1
Exploit-DB

Summary

Directory traversal vulnerability in smbfs in Linux 2.6.16 and earlier allows local users to escape chroot restrictions for an SMB-mounted filesystem via "..\\" sequences, a similar vulnerability to CVE-2006-1863.

Patch / fix

  • kernel RHEL 3 2.4.21-47.0.1.EL
  • kernel-smp RHEL 3 2.4.21-47.0.1.EL
  • kernel-BOOT RHEL 3 2.4.21-47.0.1.EL
  • kernel-source RHEL 3 2.4.21-47.0.1.EL
  • kernel-hugemem RHEL 3 2.4.21-47.0.1.EL
  • kernel-unsupported RHEL 3 2.4.21-47.0.1.EL
  • kernel-smp-unsupported RHEL 3 2.4.21-47.0.1.EL
  • kernel-hugemem-unsupported RHEL 3 2.4.21-47.0.1.EL

red hat advisories RHSA-2006:0710RHSA-2006:0493

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-2006-1864 updated

security flaw

  • Red Hat Desktop version 3 kernel 2.4.21-47.0.1.EL, kernel-smp 2.4.21-47.0.1.EL, kernel-BOOT 2.4.21-47.0.1.EL, kernel-source 2.4.21-47.0.1.EL, kernel-hugemem 2.4.21-47.0.1.EL, kernel-unsupported 2.4.21-47.0.1.EL, +2 more Red Hat Enterprise Linux AS version 3 kernel 2.4.21-47.0.1.EL, kernel-smp 2.4.21-47.0.1.EL, kernel-BOOT 2.4.21-47.0.1.EL, kernel-source 2.4.21-47.0.1.EL, kernel-hugemem 2.4.21-47.0.1.EL, kernel-unsupported 2.4.21-47.0.1.EL, +2 more
    fixed: vendor fix RHSA-2006:0710
  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-34.0.1.EL, kernel-smp 2.6.9-34.0.1.EL, kernel-hugemem 2.6.9-34.0.1.EL, kernel-largesmp 2.6.9-34.0.1.EL Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-34.0.1.EL, kernel-smp 2.6.9-34.0.1.EL, kernel-hugemem 2.6.9-34.0.1.EL, kernel-largesmp 2.6.9-34.0.1.EL
    fixed: vendor fix RHSA-2006:0493
  • Red Hat Enterprise Linux ES version 2.1
    fixed: vendor fix RHSA-2006:0579
  • Red Hat Enterprise Linux ES version 3 kernel 2.4.21-47.0.1.EL, kernel-smp 2.4.21-47.0.1.EL, kernel-BOOT 2.4.21-47.0.1.EL, kernel-source 2.4.21-47.0.1.EL, kernel-hugemem 2.4.21-47.0.1.EL, kernel-unsupported 2.4.21-47.0.1.EL, +2 more
    fixed: vendor fix RHSA-2006:0710
  • Red Hat Enterprise Linux ES version 4 kernel 2.6.9-34.0.1.EL, kernel-smp 2.6.9-34.0.1.EL, kernel-hugemem 2.6.9-34.0.1.EL, kernel-largesmp 2.6.9-34.0.1.EL
    fixed: vendor fix RHSA-2006:0493
  • Red Hat Enterprise Linux WS version 2.1
    fixed: vendor fix RHSA-2006:0579
  • Red Hat Enterprise Linux WS version 3 kernel 2.4.21-47.0.1.EL, kernel-smp 2.4.21-47.0.1.EL, kernel-BOOT 2.4.21-47.0.1.EL, kernel-source 2.4.21-47.0.1.EL, kernel-hugemem 2.4.21-47.0.1.EL, kernel-unsupported 2.4.21-47.0.1.EL, +2 more
    fixed: vendor fix RHSA-2006:0710
  • Red Hat Enterprise Linux WS version 4 kernel 2.6.9-34.0.1.EL, kernel-smp 2.6.9-34.0.1.EL, kernel-hugemem 2.6.9-34.0.1.EL, kernel-largesmp 2.6.9-34.0.1.EL
    fixed: vendor fix RHSA-2006:0493
show 1 more
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2006:0580

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

Timeline

  1. Published
  2. First public exploit (EDB-27766)

Exploit prediction

1.19% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-27766 Linux Kernel 2.6.x - SMBFS CHRoot Security Restriction Bypass local, 2006-04-28
  • bugzilla.redhat.com https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=189435 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/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.