Linux Kernel up to 6.19.11 netfilter null termination

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 6.19.11. Impacted is an unknown function of the component netfilter. Performing a manipulation results in null termination. This vulnerability is identified as CVE-2026-43028. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.19.11. This affects an unknown code of the component netfilter. The manipulation with an unknown input leads to a null termination vulnerability. CWE is classifying the issue as CWE-170. The product does not terminate or incorrectly terminates a string or array with a null character or equivalent terminator. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: ensure names are nul-terminated Reject names that lack a \0 character before feeding them to functions that expect c-strings. Fixes tag is the most recent commit that needs this change.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-43028 since 05/01/2026. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/17/2026).

The vulnerability scanner Nessus provides a plugin with the ID 321690 (SUSE SLES12 Security Update : kernel (SUSE-SU-2026:2450-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22 or 6.19.12 eliminates this vulnerability. Applying the patch bcac50ea0a29d430eedc5ac87b215393b567baa9/ea01c1b219f5a11c66918abaa6f052e5a74041d6/aa6cd4a8863391e0a64f62d8922cb0af732a2cf2/c2d4a3abb15ca14716c6d8b9ffcbcd7c63626af4/673bbd36cba21d10a10f0932f479df7468e26fbb/f419bdc205894750f4d3ec042bc87a1b9cde1351/73124608172890306b85f2206d8b3cac20e324f1/a958a4f90ddd7de0800b33ca9d7b886b7d40f74e is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (321690). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.1
CNA Vector (Linux): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null termination
CWE: CWE-170 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 321690
Nessus Name: SUSE SLES12 Security Update : kernel (SUSE-SU-2026:2450-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.253/5.15.203/6.1.168/6.6.134/6.12.81/6.18.22/6.19.12
Patch: bcac50ea0a29d430eedc5ac87b215393b567baa9/ea01c1b219f5a11c66918abaa6f052e5a74041d6/aa6cd4a8863391e0a64f62d8922cb0af732a2cf2/c2d4a3abb15ca14716c6d8b9ffcbcd7c63626af4/673bbd36cba21d10a10f0932f479df7468e26fbb/f419bdc205894750f4d3ec042bc87a1b9cde1351/73124608172890306b85f2206d8b3cac20e324f1/a958a4f90ddd7de0800b33ca9d7b886b7d40f74e

Timelineinfo

05/01/2026 Advisory disclosed
05/01/2026 +0 days CVE reserved
05/01/2026 +0 days VulDB entry created
07/17/2026 +77 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-43028 (🔒)
GCVE (CVE): GCVE-0-2026-43028
GCVE (VulDB): GCVE-100-360651

Entryinfo

Created: 05/01/2026 17:46
Updated: 07/17/2026 11:18
Changes: 05/01/2026 17:46 (58), 06/21/2026 08:19 (2), 07/17/2026 11:18 (11)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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