The route cache implementation in Linux 2.4, and the Netfilter IP conntrack module…
Priority LOW 33Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
The route cache implementation in Linux 2.4, and the Netfilter IP conntrack module, allows remote attackers to cause a denial of service (CPU consumption) via packets with forged source addresses that cause a large number of hash table collisions.
Why it matters now
EPSS 0.07728 94th percentileScored 2026-11-07
Fix Fixed Red Hat: 2 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
Red Hat 2 advisories
- RHSA-2003:190 Released 2003-06-25 · Red Hat rating Important: : : Updated 2.4 kernel for pSeries and iSeries fixes vulnerabilities
- Red Hat Linux 7.1
- RHSA-2003:145 Released 2003-05-27 · Red Hat rating ImportantUpdated kernel fixes security vulnerabilities and updates drivers
- Red Hat Enterprise Linux AS (Advanced Server) version 2.1
- Red Hat Linux Advanced Workstation 2.1
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux AS (Advanced Server) version 2.1 | Fixed | RHSA-2003:145 |
| Red Hat Enterprise Linux ES version 2.1 | Fixed | RHSA-2003:147 |
| Red Hat Enterprise Linux WS version 2.1 | Fixed | RHSA-2003:147 |
| Red Hat Linux 7.1 | Fixed | RHSA-2003:190 |
| Red Hat Linux Advanced Workstation 2.1 | Fixed | RHSA-2003:145 |
Timeline
- 2026-10-02 Threatist record created from CVE-2003-0244
- 2026-10-03 Alias added: GHSA-vrhw-hjvj-3gr3
References
Patch 2
Advisory 9
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2003-0244 · CVE Program
- CVE-2003-0244 · NVD
- FIRST EPSS
- GHSA-vrhw-hjvj-3gr3 · GitHub Advisory Database · CC BY 4.0
- CVE-2003-0244 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences