# power: supply: max17040: propagate register read errors

CVE record · `CVE-2026-89462`

- **Identifiers:** `CVE-2026-89462`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:43 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `c6f4a42de60b981dd210de01cd3e575835e3158e to before abf348c40cd409db72758377f1eb6ed400c981c6` (git)
  - affected: `c6f4a42de60b981dd210de01cd3e575835e3158e to before bcdcbef9c5e69a1e79c6b9f6a3434da2f68724ed` (git)
  - affected: `c6f4a42de60b981dd210de01cd3e575835e3158e to before 2943a0edd4865ed744702ada647921c3981207f6` (git)
  - affected: `c6f4a42de60b981dd210de01cd3e575835e3158e to before 13fb0477da9b400071b9d518b24d6434c4965263` (git)
  - affected: `c6f4a42de60b981dd210de01cd3e575835e3158e to before c7aa4c3708cc0d8487336f8281665eaea87130f6` (git)
  - affected: `c6f4a42de60b981dd210de01cd3e575835e3158e to before 659cc3d8d5ef246263873fce72c8cadeeed073cc` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.31`
  - unaffected: `before 2.6.31` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Linux kernel versions from c6f4a42de60b981dd210de01cd3e575835e3158e up to the listed fixes, and 2.6.31 specifically, have a flaw in the max17040 power supply driver. When an I2C register read fails, the driver ignores the error and reports an uninitialized value to userspace as a valid battery voltage or state of charge. The source gives few details about attacker access, and this is a fault condition rather than an attack path. Upgrade to a fixed Linux kernel release: 6.1.191 or later in the 6.1 series, 6.6.160 or later in 6.6, 6.12.109 or later in 6.12, or 6.18.50 or later in 6.18.

Written 12 Nov 2026.

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0021, the 10th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89462](https://www.cve.org/CVERecord?id=CVE-2026-89462)
- [NVD: CVE-2026-89462](https://nvd.nist.gov/vuln/detail/CVE-2026-89462)

### References from the CNA

- <https://git.kernel.org/stable/c/abf348c40cd409db72758377f1eb6ed400c981c6>
- <https://git.kernel.org/stable/c/bcdcbef9c5e69a1e79c6b9f6a3434da2f68724ed>
- <https://git.kernel.org/stable/c/2943a0edd4865ed744702ada647921c3981207f6>
- <https://git.kernel.org/stable/c/13fb0477da9b400071b9d518b24d6434c4965263>
- <https://git.kernel.org/stable/c/c7aa4c3708cc0d8487336f8281665eaea87130f6>
- <https://git.kernel.org/stable/c/659cc3d8d5ef246263873fce72c8cadeeed073cc>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-89462>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89462/>. Everything for agents: <https://agentprime.io/llms.txt>.