CVE-2006-2444Linux Kernel Vulnerability
The snmp_trap_decode function in the SNMP NAT helper for Linux kernel before 2.6.16.18 allows remote attackers to cause a denial of service (crash) via unspecified remote attack vectors that cause failures in snmp_trap_decode that trigger (1) frees of random memory or (2) frees…
Published May 20, 2006 · Updated Mar 9, 2026
Key Facts
Patch immediately- CVE-2006-2444 is a high-severity vulnerability (CVSS 7.8 v2) affecting Linux Kernel, fai-kernels (debian), kernel-source-2.4.27 (debian) and 3 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 22% probability of exploitation in the next 30 days.
- Fixed versions are available, including fai-kernels 1.9.1sarge4, kernel 0:2.6.9-42.0.2.EL, kernel-source-2.4.27 2.4.27-10sarge4.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
7.8
AV:N/AC:L/Au:N/C:N/I:N/A:C
EPSS (30-day exploit likelihood)
22%
Higher than 97.6% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
38/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
- advisoryRHSA-2006:0437
- advisoryRHSA-2006:0580
- advisoryRHSA-2006:0617
- patchhttp://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.18
- patch20225
Description
The snmp_trap_decode function in the SNMP NAT helper for Linux kernel before 2.6.16.18 allows remote attackers to cause a denial of service (crash) via unspecified remote attack vectors that cause failures in snmp_trap_decode that trigger (1) frees of random memory or (2) frees of previously-freed memory (double-free) by snmp_trap_decode as well as its calling function, as demonstrated via certain test cases of the PROTOS SNMP test suite.
Affected Products
177 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Linux KernelLinux | 2.6.0, 2.6.0-test1, 2.6.0-test10, 2.6.0-test11, 2.6.0-test2, 2.6.0-test3, 2.6.0-test4, 2.6.0-test5 | n/a |
| fai-kernelsdebian | See advisory | 1.9.1sarge4 |
| kernel-source-2.4.27debian | See advisory | 2.4.27-10sarge4 |
| kernel-source-2.6.8debian | See advisory | 2.6.8-16sarge5 |
| systemimagerdebian | See advisory | 3.2.3-6sarge3 |
Patched Releases
fai-kernels
1.9.1sarge4
kernel
0:2.6.9-42.0.2.EL
kernel-source-2.4.27
2.4.27-10sarge4
kernel-source-2.6.8
2.6.8-16sarge5
systemimager
3.2.3-6sarge3
Timeline
Publicly disclosed
May 20, 2006
Last updated
Mar 9, 2026
References
- advisoryRHSA-2006:0437
- advisoryRHSA-2006:0580
- advisoryRHSA-2006:0617
- patchkernel.org · ChangeLog-2.6.16.18
- patch20225
FAQ
Common Questions.
The snmp_trap_decode function in the SNMP NAT helper for Linux kernel before 2.6.16.18 allows remote attackers to cause a denial of service (crash) via unspecified remote attack vectors that cause failures in snmp_trap_decode that trigger (1) frees of random memory or (2) frees of previously-freed memory (double-free)…
Affected: Linux Kernel versions 2.6.0, 2.6.0-test1, 2.6.0-test10, 2.6.0-test11, 2.6.0-test2, 2.6.0-test3, 2.6.0-test4, 2.6.0-test5; fai-kernels (debian); kernel-source-2.4.27 (debian), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including fai-kernels 1.9.1sarge4, kernel 0:2.6.9-42.0.2.EL, kernel-source-2.4.27 2.4.27-10sarge4.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2006-2444 On Your Attack Surface?
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