Linux Kernel up to 6.19.11 bpf regsafe state issue

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.90

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.19.11 and classified as critical. This impacts the function regsafe of the component bpf. Performing a manipulation results in state issue. This vulnerability is cataloged as CVE-2026-43030. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.19.11. It has been classified as critical. This affects the function regsafe of the component bpf. The manipulation with an unknown input leads to a state issue vulnerability. CWE is classifying the issue as CWE-371. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix regsafe() for pointers to packet In case rold->reg->range == BEYOND_PKT_END && rcur->reg->range == N regsafe() may return true which may lead to current state with valid packet range not being explored. Fix the bug.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-43030 since 05/01/2026. Technical details of the vulnerability are known, but there is no available exploit. 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 321588 (SUSE SLES16 Security Update : kernel (SUSE-SU-2026:22127-1)), 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 b52f6d0ef7b308f9d05bbddb78749852f28e8e40/37db6b9726d0bcf91cbdf9d63b558c50da49f968/015a74476dc1ab6923d89f1ee009aaf43faa7185/b99d82706bd1511bb875e3de7154698fd9215c99/7241da033fdc507b920e092dab1f97b945cb0370/8aebe18069394f4a79d2d82080a0f806da449996/ca995b1462ec6db1e869100ba1fb7356bd3f22f0/a8502a79e832b861e99218cbd2d8f4312d62e225 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 (321588). 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: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (Linux): 🔒

CVSSv2info

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

Exploitinginfo

Class: State issue
CWE: CWE-371
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: 321588
Nessus Name: SUSE SLES16 Security Update : kernel (SUSE-SU-2026:22127-1)

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: b52f6d0ef7b308f9d05bbddb78749852f28e8e40/37db6b9726d0bcf91cbdf9d63b558c50da49f968/015a74476dc1ab6923d89f1ee009aaf43faa7185/b99d82706bd1511bb875e3de7154698fd9215c99/7241da033fdc507b920e092dab1f97b945cb0370/8aebe18069394f4a79d2d82080a0f806da449996/ca995b1462ec6db1e869100ba1fb7356bd3f22f0/a8502a79e832b861e99218cbd2d8f4312d62e225

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-2026-43030 (🔒)
GCVE (CVE): GCVE-0-2026-43030
GCVE (VulDB): GCVE-100-360699

Entryinfo

Created: 05/01/2026 18:02
Updated: 07/17/2026 11:18
Changes: 05/01/2026 18:02 (59), 06/20/2026 21:47 (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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