7.7

CVE-2026-81016: linux

CVSS: 7.7v3.1HighReceived
AliasesUBUNTU-CVE-2026-81016DEBIAN-CVE-2026-81016
Published 11-09-2026Last modified 21-10-2026
Open JSON

Vulnerability summary

CVE-2026-81016 is a high (CVSS 7.7) vulnerability in linux. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.2% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.7/10
010
High · v3.1 (CVE.org)
EPSS score
0.19%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:11805-1

Timeline

  1. 11-09-2026
    PublishedVulnerability first disclosed.
  2. 21-10-2026
    Last modifiedVulnerability information updated.

Description

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().

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

+0.01 pp

From 0.18% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu142 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.113-1 | < 7.2.6-1
Linux1 product
  • linux≥ 3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d, < 85ef9d4c384c1d143c51580933674d94dba3b8d9 | ≥ 3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d, < 638e1ca5d4e2b4fdbb209db64926d013b34f3b79 | ≥ 3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d, < 8178f59d76570b152d836bde07f5997f15861f04 | ≥ 3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d, < 775d4cde1f9737796ce7d8393521e9e8c5b49891 | ≥ 3d7d407dfb05b257e15cb0c6b056428a4a8c2e5d, < 0225c1d637687b03726f00ac65b6def843d2c464 | 5.18

3 vendors · 144 products

References

9 links