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Vulnerabilities

Vulnerability · CVE-2003-0961

Linux Kernel Integer Overflow or Wraparound

Published Dec 19, 2003 · catalog updated Dec 19, 2003 · Linux Kernel

Patch now

CVE-2003-0961 is in the CISA known-exploited catalog. Confirm Linux Kernel against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
3.92%
Remediation
Remediation guidance
Affected products
stated Kernel · vendor Linux Kernel

Integer overflow in the do_brk function for the brk system call in Linux kernel 2.4.22 and earlier allows local users to gain root privileges.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated Kernel<= 2.4.22
  • vendor Linux Kernelversion unspecified

How to fix CVE-2003-0961

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2003-0961 is in the CISA known-exploited catalog. Confirm Linux Kernel against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with Kernel <= 2.4.22. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 3.92%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 19, 2003 · VulnCheck KEV

    Detected

    Integer overflow in the do_brk function for the brk system call in Linux kernel 2.4.22 and earlier allows local users to gain root privileges.

  2. Dec 19, 2003 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2003-0961

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2003-0961

    30-day exploitation probability 3.9%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2003-0961

    Integer overflow in the do_brk function for the brk system call in Linux kernel 2.4.22 and earlier allows local users to gain root privileges.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.