net/ipv4/netfilter/arp_tables.c in the IPv4 implementation in the Linux kernel before 2.6.39 does not place the expected '\0' character at t
net/ipv4/netfilter/arp_tables.c in the IPv4 implementation in the Linux kernel before 2.6.39 does not place the expected '\0' character at the end of string data in the values of certain structure members, which allows local users to obtain potentially sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability to issue a crafted request, and then reading the argument to the resulting modprobe process.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Jun 22, 2011
- Updated
- Jun 16, 2026
- EPSS
- 0.4% · 29th percentile
- CWE
- CWE-200
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Report tools
Action score
8
Monitor
Low priority for now.
- CVSS
- 8 / 40 · 2.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernelup to 2.6.38.8 inclusive
- linux linux kernel2.6.0
- linux linux kernel2.6.1
- linux linux kernel2.6.10
- linux linux kernel2.6.11
- linux linux kernel2.6.11.1
- linux linux kernel2.6.11.10
- linux linux kernel2.6.11.11
- linux linux kernel2.6.11.12
- linux linux kernel2.6.11.2
- linux linux kernel2.6.11.3
- linux linux kernel2.6.11.4
- linux linux kernel2.6.11.5
- linux linux kernel2.6.11.6
- linux linux kernel2.6.11.7
- linux linux kernel2.6.11.8
- linux linux kernel2.6.11.9
- linux linux kernel2.6.12
- linux linux kernel2.6.12.1
- linux linux kernel2.6.12.2
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:5.0 | linux-2.6 | before 2.6.26-26lenny3 | 2.6.26-26lenny3 |
| Debian:6.0 | linux-2.6 | before 2.6.32-34squeeze1 | 2.6.32-34squeeze1 |
| Red Hat:enterprise_linux:5::server | kernel | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-debug | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-debug-debuginfo | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-debug-devel | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-debuginfo | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-debuginfo-common | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-devel | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-doc | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-kdump | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-kdump-debuginfo | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-kdump-devel | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-PAE | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-PAE-debuginfo | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-PAE-devel | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-xen | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-xen-debuginfo | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:5::server | kernel-xen-devel | before 0:2.6.18-238.12.1.el5 | 0:2.6.18-238.12.1.el5 |
| Red Hat:enterprise_linux:6::client | kernel | before 0:2.6.32-131.0.15.el6 | 0:2.6.32-131.0.15.el6 |
| Red Hat:enterprise_linux:6::client | kernel-debug | before 0:2.6.32-131.0.15.el6 | 0:2.6.32-131.0.15.el6 |
| Red Hat:enterprise_linux:6::client | kernel-debug-debuginfo | before 0:2.6.32-131.0.15.el6 | 0:2.6.32-131.0.15.el6 |
| Red Hat:enterprise_linux:6::client | kernel-debug-devel | before 0:2.6.32-131.0.15.el6 | 0:2.6.32-131.0.15.el6 |
| Red Hat:enterprise_linux:6::client | kernel-debuginfo | before 0:2.6.32-131.0.15.el6 | 0:2.6.32-131.0.15.el6 |
+48
Same product
linux: all recordsOther highest-scoring records for the same primary product.
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- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:linux-2.6 | 2.6.32-34squeeze1 · Debian:6.0 | Package registry (OSV) |
| red hat:kernel-rt | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
| red hat:kernel-rt-debug | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
| red hat:kernel-rt-debug-debuginfo | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
| red hat:kernel-rt-debug-devel | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
| red hat:kernel-rt-debuginfo | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
| red hat:kernel-rt-debuginfo-common | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
| red hat:kernel-rt-devel | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
| red hat:kernel-rt-doc | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
| red hat:kernel-rt-trace | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
| red hat:kernel-rt-trace-debuginfo | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
| red hat:kernel-rt-trace-devel | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
| red hat:kernel-rt-vanilla | 0:2.6.33.9-rt31.64.el5rt · Red Hat:enterprise_mrg:1::el5 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- P · data can be read
- Integrity
- none
- Availability
- none
- Attack complexity
- Low
- Confidentiality impact
- P
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-200 · Exposure of Sensitive Information to an Unauthorized ActorCVSS vector
AV:L/AC:L/Au:N/C:P/I:N/A:N
nvd-primary
Root cause
The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.
The bug in code
The whole CWE-200 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
{ "permissions": ["tabs", "<all_urls>"], "background": { "service_worker": "analytics.js" }}Fixed
{ "permissions": ["activeTab"], "host_permissions": ["https://yildiz.example/*"]}Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- ExcavationCAPEC-116likelihood: High · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
- FootprintingCAPEC-169likelihood: High · Very Low
- Exploiting Trust in ClientCAPEC-22likelihood: High · High
- FingerprintingCAPEC-224likelihood: High · Very Low
- ICMP Echo Request PingCAPEC-285likelihood: Medium · Low
- TCP SYN ScanCAPEC-287Low
- Enumerate Mail Exchange (MX) RecordsCAPEC-290Low
ATT&CK techniques
- System Service DiscoveryT1007
- System Network Configuration DiscoveryT1016
- Remote System DiscoveryT1018
- System Owner/User DiscoveryT1033
- Masquerading: Match Legitimate Name or LocationT1036.005
- Network Service ScanningT1046
- System Network Connections DiscoveryT1049
- Process DiscoveryT1057
- Permission Groups DiscoveryT1069
- System Information DiscoveryT1082
- File and Directory DiscoveryT1083
- Account DiscoveryT1087
- Multi-Factor Authentication InterceptionT1111
- Peripheral Device DiscoveryT1120
- System Time DiscoveryT1124
- Access Token Manipulation:Token Impersonation/TheftT1134.001
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- downloads.avaya.com/css/P8/documents/100145416
- git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=42eab94fff18cb1091d3501cd284d6bd6cc9c143
- marc.info/?l=netfilter-devel&m=129978081009955&w=2
- rhn.redhat.com/errata/RHSA-2011-0833.html
- securityreason.com/securityalert/8278
- securityreason.com/securityalert/8282
- www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- www.openwall.com/lists/oss-security/2011/03/18/15
- www.openwall.com/lists/oss-security/2011/03/21/1
- www.openwall.com/lists/oss-security/2011/03/21/4
- bugzilla.redhat.com/show_bug.cgi?id=689321
Vendor advisories and official records. Exploit/PoC links are deliberately left out.