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Fencer Vulns
medium 6.4

CVE-2004-0949 json

The smb_recv_trans2 function call in the samba filesystem (smbfs) in Linux kernel 2.4 and 2.6 does not properly handle the re-assembly of f…

published 2004-12-01 21 y ago modified 2026-06-16 4 mo ago also EUVD-2004-0947

cvss
6.4
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

The smb_recv_trans2 function call in the samba filesystem (smbfs) in Linux kernel 2.4 and 2.6 does not properly handle the re-assembly of fragmented packets correctly, which could allow remote samba servers to (1) read arbitrary kernel information or (2) raise a counter value to an arbitrary number by sending the first part of the fragmented packet multiple times.

Patch / fix

  • kernel RHEL 3 2.4.21-20.0.1.EL
  • kernel-smp RHEL 3 2.4.21-20.0.1.EL
  • kernel-BOOT RHEL 3 2.4.21-20.0.1.EL
  • kernel-source RHEL 3 2.4.21-20.0.1.EL
  • kernel-hugemem RHEL 3 2.4.21-20.0.1.EL
  • kernel-unsupported RHEL 3 2.4.21-20.0.1.EL
  • kernel-smp-unsupported RHEL 3 2.4.21-20.0.1.EL
  • kernel-hugemem-unsupported RHEL 3 2.4.21-20.0.1.EL

red hat advisories RHSA-2004:549

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-2004-0949 updated

security flaw

  • Red Hat Desktop version 3 kernel 2.4.21-20.0.1.EL, kernel-smp 2.4.21-20.0.1.EL, kernel-BOOT 2.4.21-20.0.1.EL, kernel-source 2.4.21-20.0.1.EL, kernel-hugemem 2.4.21-20.0.1.EL, kernel-unsupported 2.4.21-20.0.1.EL, +2 more Red Hat Enterprise Linux AS version 3 kernel 2.4.21-20.0.1.EL, kernel-smp 2.4.21-20.0.1.EL, kernel-BOOT 2.4.21-20.0.1.EL, kernel-source 2.4.21-20.0.1.EL, kernel-hugemem 2.4.21-20.0.1.EL, kernel-unsupported 2.4.21-20.0.1.EL, +2 more
    fixed: vendor fix RHSA-2004:549
  • Red Hat Enterprise Linux ES version 2.1
    fixed: vendor fix RHSA-2004:505
  • Red Hat Enterprise Linux ES version 3 kernel 2.4.21-20.0.1.EL, kernel-smp 2.4.21-20.0.1.EL, kernel-BOOT 2.4.21-20.0.1.EL, kernel-source 2.4.21-20.0.1.EL, kernel-hugemem 2.4.21-20.0.1.EL, kernel-unsupported 2.4.21-20.0.1.EL, +2 more
    fixed: vendor fix RHSA-2004:549
  • Red Hat Enterprise Linux WS version 2.1
    fixed: vendor fix RHSA-2004:505
  • Red Hat Enterprise Linux WS version 3 kernel 2.4.21-20.0.1.EL, kernel-smp 2.4.21-20.0.1.EL, kernel-BOOT 2.4.21-20.0.1.EL, kernel-source 2.4.21-20.0.1.EL, kernel-hugemem 2.4.21-20.0.1.EL, kernel-unsupported 2.4.21-20.0.1.EL, +2 more
    fixed: vendor fix RHSA-2004:549
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2004:504

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

2.63% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:P/I:P/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.