What is CVE-2026-43030?

CVE-2026-43030 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Incorrect Calculation flaw (CWE-682), affecting Linux kernel versions from 5.10.155 onward and patched in 5.10.253, 5.15.203, 6.1.168 and others. CVE-2026-43030 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-43030?

CVE-2026-43030 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-43030?

Yes, CVE-2026-43030 has been patched. Fixed versions include 5.10.253, 5.15.203, 6.1.168 and others. If you are running Linux kernel 5.10.155 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-43030 actively exploited?

CVE-2026-43030 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Incorrect Calculation (CWE-682)?

The product performs a calculation that generates incorrect or unintended results. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/682.html

CVE-2026-43030

High

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.

Package Linux Kernel

Published 2026-05-01

Last modified 2026-10-19

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-682

CVE-2026-43030 is a Incorrect Calculation vulnerability

What is Incorrect Calculation?

The product performs a calculation that generates incorrect or unintended results. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.10.155, 5.11 and later are affected. Fixed in 5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12, 7.0 and their respective stable series.

Affected from

≥ 5.10.155 ≥ 5.11

Fixed in

✓ 5.10.253 5.10.x ✓ 5.15.203 5.15.x ✓ 6.1.168 6.1.x ✓ 6.6.134 6.6.x ✓ 6.12.81 6.12.x ✓ 6.18.22 6.18.x ✓ 6.19.12 6.19.x ✓ 7.0

References

11 total

Kernel Git
https://git.kernel.org/stable/c/015a74476dc1ab6923d89f1ee009aaf43faa7185

Patch
Kernel Git
https://git.kernel.org/stable/c/37db6b9726d0bcf91cbdf9d63b558c50da49f968

Patch
Kernel Git
https://git.kernel.org/stable/c/7241da033fdc507b920e092dab1f97b945cb0370

Patch
Kernel Git
https://git.kernel.org/stable/c/8aebe18069394f4a79d2d82080a0f806da449996

Patch
Kernel Git
https://git.kernel.org/stable/c/a8502a79e832b861e99218cbd2d8f4312d62e225

Patch

Showing 5 of 11 references View all on NVD

Details

CVE ID CVE-2026-43030

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-05-01

Modified 2026-10-19

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-43030?

CVE-2026-43030 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Incorrect Calculation flaw (CWE-682) . It affects Linux kernel versions from 5.10.155 onward and has been patched in 5.10.253, 5.15.203, 6.1.168 and others. CVE-2026-43030 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-43030?

CVE-2026-43030 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-43030?

Yes. CVE-2026-43030 has been patched. Fixed versions include 5.10.253, 5.15.203, 6.1.168 and others. If you are running Linux kernel 5.10.155 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-43030 actively exploited?

No. CVE-2026-43030 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.