What is CVE-2026-43033?

CVE-2026-43033 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 4.3 onward and patched in 5.10.254, 5.15.204, 6.1.170 and others. CVE-2026-43033 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-43033?

CVE-2026-43033 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-2026-43033?

Yes, CVE-2026-43033 has been patched. Fixed versions include 5.10.254, 5.15.204, 6.1.170 and others. If you are running Linux kernel 4.3 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-43033 actively exploited?

CVE-2026-43033 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-43033

High

In the Linux kernel, the following vulnerability has been resolved: crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption When decrypting data that is not in-place (src != dst), there is no need to save the high-order sequence bits in dst as it could simply be re-copied from the source. However, the data to be hashed need to be rearranged accordingly. Thanks,

Package Linux Kernel

Published 2026-05-01

Last modified 2026-05-08

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

Affected versions

Linux kernel versions 4.3 and later are affected. Fixed in 5.10.254, 5.15.204, 6.1.170, 6.6.137, 6.12.85, 6.18.22, 6.19.12, 7.0 and their respective stable series.

Affected from

≥ 4.3

Fixed in

✓ 5.10.254 5.10.x ✓ 5.15.204 5.15.x ✓ 6.1.170 6.1.x ✓ 6.6.137 6.6.x ✓ 6.12.85 6.12.x ✓ 6.18.22 6.18.x ✓ 6.19.12 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-43033 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/153d5520c3f9fd62e71c7e7f9e34b59cf411e555
Patch
Kernel patch commit
https://git.kernel.org/stable/c/5466e7d0cd9e4f9cef9d8f18f18b60e7bc1c77e5
Patch
Kernel patch commit
https://git.kernel.org/stable/c/89fe118b6470119b20c04afc36e45b81a69ea11f
Patch

8 patch commits total View all on NVD

Details

CVE ID CVE-2026-43033

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-05-01

Modified 2026-05-08

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-43033?

CVE-2026-43033 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 4.3 onward and has been patched in 5.10.254, 5.15.204, 6.1.170 and others. CVE-2026-43033 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-43033?

CVE-2026-43033 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-2026-43033?

Yes — CVE-2026-43033 has been patched. Fixed versions include 5.10.254, 5.15.204, 6.1.170 and others. If you are running Linux kernel 4.3 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-43033 actively exploited?

No — CVE-2026-43033 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.