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Fencer Vulns
low 2.1

CVE-2006-1863 json

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

published 2006-04-25 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-1863

cvss
2.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 64%
public exploits
1
Exploit-DB

Summary

Directory traversal vulnerability in CIFS 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-2006-1864.

Patch / fix

  • kernel RHEL 4 2.6.9-55.EL
  • kernel-smp RHEL 4 2.6.9-55.EL
  • kernel-xenU RHEL 4 2.6.9-55.EL
  • kernel-hugemem RHEL 4 2.6.9-55.EL
  • kernel-largesmp RHEL 4 2.6.9-55.EL

red hat advisories RHBA-2007:0304

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-2006-1863 updated

security flaw

  • Red Hat Enterprise Linux AS version 4 kernel 2.6.9-55.EL, kernel-smp 2.6.9-55.EL, kernel-xenU 2.6.9-55.EL, kernel-hugemem 2.6.9-55.EL, kernel-largesmp 2.6.9-55.EL Red Hat Enterprise Linux Desktop version 4 kernel 2.6.9-55.EL, kernel-smp 2.6.9-55.EL, kernel-xenU 2.6.9-55.EL, kernel-hugemem 2.6.9-55.EL, kernel-largesmp 2.6.9-55.EL Red Hat Enterprise Linux ES version 4 kernel 2.6.9-55.EL, kernel-smp 2.6.9-55.EL, kernel-xenU 2.6.9-55.EL, kernel-hugemem 2.6.9-55.EL, kernel-largesmp 2.6.9-55.EL Red Hat Enterprise Linux WS version 4 kernel 2.6.9-55.EL, kernel-smp 2.6.9-55.EL, kernel-xenU 2.6.9-55.EL, kernel-hugemem 2.6.9-55.EL, kernel-largesmp 2.6.9-55.EL
    fixed: vendor fix RHBA-2007:0304

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-27769)

Exploit prediction

1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-27769 Linux Kernel 2.6.x - CIFS CHRoot Security Restriction Bypass local, 2006-04-28
  • bugzilla.redhat.com https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=189434 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

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.