What is CVE-2026-81016?

CVE-2026-81016 is a High severity Linux kernel vulnerability with a CVSS score of 7.7 out of 10, affecting Linux kernel versions from 5.18 onward and patched in 6.12.112, 6.18.50, 7.2.4 and others. CVE-2026-81016 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-81016?

CVE-2026-81016 has a CVSS score of 7.7 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Is there a patch available for CVE-2026-81016?

Yes, CVE-2026-81016 has been patched. Fixed versions include 6.12.112, 6.18.50, 7.2.4 and others. If you are running Linux kernel 5.18 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-81016 actively exploited?

CVE-2026-81016 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-81016

High

In the Linux kernel, the following vulnerability has been resolved: platform/x86/amd/pmc: Propagate SMU errors and validate S2D address amd_stb_s2d_init() discards the return value of several S2D SMU commands. When the SMU refuses a command (e.g. "SMU cmd failed. err: 0xff") the failure is only noticed indirectly - if at all - and reported as -EIO, masking the real error. More seriously, the S2D_PHYS_ADDR_LOW/HIGH return values are ignored, so on failure phys_addr_low/hi are left uninitialised and the assembled address is passed straight to devm_ioremap(). When the SMU leaves them at zero this maps physical address 0 and trips the ioremap-on-RAM warning: amd_pmc AMDI000B:00: SMU cmd failed. err: 0xff ioremap on RAM at 0x0000000000000000 - 0x0000000000ffffff WARNING: CPU: 13 PID: 4592 at arch/x86/mm/ioremap.c:... Check the return value of each SMU command and propagate it, and reject a zero physical address before calling devm_ioremap().

Package Linux Kernel

Published 2026-09-11

Last modified 2026-10-03

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.7

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 5.18 and later are affected. Fixed in 6.12.112, 6.18.50, 7.2.4, 7.3-rc1 and their respective stable series.

Affected from

≥ 5.18

Fixed in

✓ 6.12.112 6.12.x ✓ 6.18.50 6.18.x ✓ 7.2.4 7.2.x ✓ 7.3-rc1

References

4 total

Details

CVE ID CVE-2026-81016

Severity High

CVSS score 7.7 / 10

CVSS version 3.1

Published 2026-09-11

Modified 2026-10-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-81016?

CVE-2026-81016 is a High severity Linux kernel vulnerability with a CVSS score of 7.7 out of 10 . It affects Linux kernel versions from 5.18 onward and has been patched in 6.12.112, 6.18.50, 7.2.4 and others. CVE-2026-81016 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-81016?

CVE-2026-81016 has a CVSS score of 7.7 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Is there a patch available for CVE-2026-81016?

Yes. CVE-2026-81016 has been patched. Fixed versions include 6.12.112, 6.18.50, 7.2.4 and others. If you are running Linux kernel 5.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-81016 actively exploited?

No. CVE-2026-81016 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.