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Fencer Vulns
high 7.2

CVE-2004-0077 json

The do_mremap function for the mremap system call in Linux 2.2 to 2.2.25, 2.4 to 2.4.24, and 2.6 to 2.6.2, does not properly check the retu…

published 2004-03-03 22 y ago modified 2026-06-16 4 mo ago also EUVD-2004-0077

cvss
7.2
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.5%
EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits
2
Exploit-DB

Summary

The do_mremap function for the mremap system call in Linux 2.2 to 2.2.25, 2.4 to 2.4.24, and 2.6 to 2.6.2, does not properly check the return value from the do_munmap function when the maximum number of VMA descriptors is exceeded, which allows local users to gain root privileges, a different vulnerability than CAN-2003-0985.

Patch / fix

  • kernel RHEL 3 2.4.21-9.0.1.EL
  • s390utils RHEL 3 2:1.2.4-3
  • kernel-smp RHEL 3 2.4.21-9.0.1.EL
  • kernel-BOOT RHEL 3 2.4.21-9.0.1.EL
  • kernel-source RHEL 3 2.4.21-9.0.1.EL
  • kernel-hugemem RHEL 3 2.4.21-9.0.1.EL
  • kernel-unsupported RHEL 3 2.4.21-9.0.1.EL
  • kernel-smp-unsupported RHEL 3 2.4.21-9.0.1.EL

red hat advisories RHSA-2004:066

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-2004-0077 updated

security flaw

  • Red Hat Desktop version 3 kernel 2.4.21-9.0.1.EL, kernel-smp 2.4.21-9.0.1.EL, kernel-BOOT 2.4.21-9.0.1.EL, kernel-source 2.4.21-9.0.1.EL, kernel-hugemem 2.4.21-9.0.1.EL, kernel-unsupported 2.4.21-9.0.1.EL, +2 more Red Hat Enterprise Linux AS version 3 s390utils 1.2.4-3, kernel 2.4.21-9.0.1.EL, kernel-smp 2.4.21-9.0.1.EL, kernel-BOOT 2.4.21-9.0.1.EL, kernel-source 2.4.21-9.0.1.EL, kernel-hugemem 2.4.21-9.0.1.EL, +3 more
    fixed: vendor fix RHSA-2004:066
  • Red Hat Enterprise Linux ES version 2.1
    fixed: vendor fix RHSA-2004:069
  • Red Hat Enterprise Linux ES version 3 kernel 2.4.21-9.0.1.EL, kernel-smp 2.4.21-9.0.1.EL, kernel-BOOT 2.4.21-9.0.1.EL, kernel-source 2.4.21-9.0.1.EL, kernel-hugemem 2.4.21-9.0.1.EL, kernel-unsupported 2.4.21-9.0.1.EL, +2 more
    fixed: vendor fix RHSA-2004:066
  • Red Hat Enterprise Linux WS version 2.1
    fixed: vendor fix RHSA-2004:069
  • Red Hat Enterprise Linux WS version 3 kernel 2.4.21-9.0.1.EL, kernel-smp 2.4.21-9.0.1.EL, kernel-BOOT 2.4.21-9.0.1.EL, kernel-source 2.4.21-9.0.1.EL, kernel-hugemem 2.4.21-9.0.1.EL, kernel-unsupported 2.4.21-9.0.1.EL, +2 more
    fixed: vendor fix RHSA-2004:066
  • Red Hat Linux 9
    fixed: vendor fix RHSA-2004:065
  • Red Hat Linux Advanced Workstation 2.1
    fixed: vendor fix RHSA-2004:106

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. First public exploit (EDB-154)
  2. Published

Exploit prediction

2.45% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-160 Linux Kernel 2.2.25/2.4.24/2.6.2 - 'mremap()' Local Privilege Escalation local, 2004-03-01
  • EDB-154 Linux Kernel 2.2.25/2.4.24/2.6.2 - 'mremap()' Validator local, 2004-02-18
  • securityfocus.com http://www.securityfocus.com/bid/9686 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/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.