What is CVE-2026-23070?

CVE-2026-23070 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.9 onward and patched in 6.12.78, 6.18.8 and 6.19. CVE-2026-23070 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23070?

CVE-2026-23070 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-23070?

Yes, CVE-2026-23070 has been patched. Fixed versions include 6.12.78, 6.18.8 and 6.19. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23070 actively exploited?

CVE-2026-23070 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-23070

Medium

In the Linux kernel, the following vulnerability has been resolved: Octeontx2-af: Add proper checks for fwdata firmware populates MAC address, link modes (supported, advertised) and EEPROM data in shared firmware structure which kernel access via MAC block(CGX/RPM). Accessing fwdata, on boards booted with out MAC block leading to kernel panics. Internal error: Oops: 0000000096000005 [#1] SMP [ 10.460721] Modules linked in: [ 10.463779] CPU: 0 UID: 0 PID: 174 Comm: kworker/0:3 Not tainted 6.19.0-rc5-00154-g76ec646abdf7-dirty #3 PREEMPT [ 10.474045] Hardware name: Marvell OcteonTX CN98XX board (DT) [ 10.479793] Workqueue: events work_for_cpu_fn [ 10.484159] pstate: 80400009 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 10.491124] pc : rvu_sdp_init+0x18/0x114 [ 10.495051] lr : rvu_probe+0xe58/0x1d18

Package Linux Kernel

Published 2026-02-04

Last modified 2026-03-25

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.9 and later are affected. Fixed in 6.12.78, 6.18.8, 6.19 and their respective stable series.

Affected from

≥ 6.9

Fixed in

✓ 6.12.78 6.12.x ✓ 6.18.8 6.18.x ✓ 6.19

References

The following references provide additional information about CVE-2026-23070 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/079050a23de6b7505595e4af75b36c34f0e9627e
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4a3dba48188208e4f66822800e042686784d29d1
Patch
Kernel patch commit
https://git.kernel.org/stable/c/e343973fab43c266a40e4e0dabdc4216db6d5eff
Patch

Details

CVE ID CVE-2026-23070

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-02-04

Modified 2026-03-25

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23070?

CVE-2026-23070 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.9 onward and has been patched in 6.12.78, 6.18.8 and 6.19. CVE-2026-23070 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23070?

CVE-2026-23070 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-23070?

Yes — CVE-2026-23070 has been patched. Fixed versions include 6.12.78, 6.18.8 and 6.19. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23070 actively exploited?

No — CVE-2026-23070 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.