# i2c: smbus: reject oversized block transfers in the common path

CVE record · `CVE-2026-93287`

- **Identifiers:** `CVE-2026-93287`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 24 Sept 2026
- **Updated:** 3 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 24 Sept 2026, 16:02 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: `4710317891e4824ce1510a6b5066abbd3e917750 to before 856dffcc097b3d8ed45a643ebda07cb92968cb33` (git)
  - affected: `4710317891e4824ce1510a6b5066abbd3e917750 to before 356875e33f2c6d2061a02c9dec1a1e639d265a55` (git)
  - affected: `4710317891e4824ce1510a6b5066abbd3e917750 to before 72ca5e0b8b7a62615758f8871c34d61616c2dc8b` (git)
  - affected: `4710317891e4824ce1510a6b5066abbd3e917750 to before df077253f6405d67ad087538e495ef32a05717b7` (git)
  - affected: `4710317891e4824ce1510a6b5066abbd3e917750 to before f09edffba97d37b1fdff5f818a9a45f8a98ac171` (git)
  - affected: `4710317891e4824ce1510a6b5066abbd3e917750 to before c4b478bc50b7ca9865e237909941253a0f7111a2` (git)
  - affected: `4710317891e4824ce1510a6b5066abbd3e917750 to before 3051cd060fa496df42954291fa2306ed2eab4ecc` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.33`
  - unaffected: `before 2.6.33` (semver)
  - unaffected: `5.10.271 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.222 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.189 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.111 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.53 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## 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

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0013, the 2nd percentile, on 12 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 24 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93287](https://www.cve.org/CVERecord?id=CVE-2026-93287)
- [NVD: CVE-2026-93287](https://nvd.nist.gov/vuln/detail/CVE-2026-93287)

### References from the CNA

- <https://git.kernel.org/stable/c/856dffcc097b3d8ed45a643ebda07cb92968cb33>
- <https://git.kernel.org/stable/c/356875e33f2c6d2061a02c9dec1a1e639d265a55>
- <https://git.kernel.org/stable/c/72ca5e0b8b7a62615758f8871c34d61616c2dc8b>
- <https://git.kernel.org/stable/c/df077253f6405d67ad087538e495ef32a05717b7>
- <https://git.kernel.org/stable/c/f09edffba97d37b1fdff5f818a9a45f8a98ac171>
- <https://git.kernel.org/stable/c/c4b478bc50b7ca9865e237909941253a0f7111a2>
- <https://git.kernel.org/stable/c/3051cd060fa496df42954291fa2306ed2eab4ecc>

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-2026-93287>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93287/>. Everything for agents: <https://agentprime.io/llms.txt>.