Race condition in the do_add_counters function in netfilter for Linux kernel 2.6.16…
Priority LOW 21CWE-362Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · None · Complete
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
Race condition in the do_add_counters function in netfilter for Linux kernel 2.6.16 allows local users with CAP_NET_ADMIN capabilities to read kernel memory by triggering the race condition in a way that produces a size value that is inconsistent with allocated memory, which leads to a buffer over-read in IPT_ENTRY_ITERATE.
Why it matters now
EPSS 0.003 22nd percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
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 1 advisory
- RHSA-2006:0689 Released 2006-10-05 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux AS version 4 kernel-2.6.9-42.0.3.EL, kernel-2.6.9-42.0.3.EL.ia64, kernel-2.6.9-42.0.3.EL.ppc64iseries +12
- Red Hat Enterprise Linux Desktop version 4 kernel-2.6.9-42.0.3.EL, kernel-devel-2.6.9-42.0.3.EL, kernel-doc-2.6.9-42.0.3.EL +6
- Red Hat Enterprise Linux ES version 4 kernel-2.6.9-42.0.3.EL, kernel-2.6.9-42.0.3.EL.ia64, kernel-devel-2.6.9-42.0.3.EL +10
- Red Hat Enterprise Linux WS version 4 kernel-2.6.9-42.0.3.EL, kernel-2.6.9-42.0.3.EL.ia64, kernel-devel-2.6.9-42.0.3.EL +10
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux AS version 4 | Fixed | RHSA-2006:0689 |
| Red Hat Enterprise Linux Desktop version 4 | Fixed | RHSA-2006:0689 |
| Red Hat Enterprise Linux ES version 4 | Fixed | RHSA-2006:0689 |
| Red Hat Enterprise Linux WS version 4 | Fixed | RHSA-2006:0689 |
Timeline
- 2026-10-02 Threatist record created from CVE-2006-0039
- 2026-10-03 Alias added: GHSA-25rg-6fcp-95mq
References
Advisory 4
Other 8
- ADV-2006-2554
- http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2722971cbe831117686039d5c334f2c0f560be13
- ADV-2006-1893
- oval:org.mitre.oval:def:10309
- http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.17
- 25697
- http://support.avaya.com/elmodocs2/security/ASA-2006-249.htm
- https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=191698
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-2006-0039 · CVE Program
- CVE-2006-0039 · NVD
- FIRST EPSS
- GHSA-25rg-6fcp-95mq · GitHub Advisory Database · CC BY 4.0
- CVE-2006-0039 · 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