# s390/dasd: Guard sysfs discipline callbacks against unallocated private data

CVE record · `CVE-2026-89457`

- **Identifiers:** `CVE-2026-89457`
- **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:** 19 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: `c729696bcf8b23450043dd9c9972c15e53419ae4 to before 644b666c202cce12ccfcf9ded67089b18f4f7659` (git)
  - affected: `c729696bcf8b23450043dd9c9972c15e53419ae4 to before 4a042d8e5f34282577ece50515cea8bb1246914d` (git)
  - affected: `c729696bcf8b23450043dd9c9972c15e53419ae4 to before bd8b4572528f9604a13bf3c7c2a167f5cf222f72` (git)
  - affected: `c729696bcf8b23450043dd9c9972c15e53419ae4 to before 57db27ccc162afe0726cffec0ae62e410ed2d0e9` (git)
  - affected: `c729696bcf8b23450043dd9c9972c15e53419ae4 to before 536407b272402af679155910d7fdeeb4834eefb9` (git)
  - affected: `c729696bcf8b23450043dd9c9972c15e53419ae4 to before 6452c13646af7c13d7f6668b6690cfb2427e7f7b` (git)
  - affected: `c729696bcf8b23450043dd9c9972c15e53419ae4 to before 449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5` (git)
  - affected: `c729696bcf8b23450043dd9c9972c15e53419ae4 to before 2a1780f9fc2493bd34c418a0be6fc58943afcecf` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.3`
  - unaffected: `before 5.3` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 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

## 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:** 0.0018, the 7th 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-2026-89457](https://www.cve.org/CVERecord?id=CVE-2026-89457)
- [NVD: CVE-2026-89457](https://nvd.nist.gov/vuln/detail/CVE-2026-89457)

### References from the CNA

- <https://git.kernel.org/stable/c/644b666c202cce12ccfcf9ded67089b18f4f7659>
- <https://git.kernel.org/stable/c/4a042d8e5f34282577ece50515cea8bb1246914d>
- <https://git.kernel.org/stable/c/bd8b4572528f9604a13bf3c7c2a167f5cf222f72>
- <https://git.kernel.org/stable/c/57db27ccc162afe0726cffec0ae62e410ed2d0e9>
- <https://git.kernel.org/stable/c/536407b272402af679155910d7fdeeb4834eefb9>
- <https://git.kernel.org/stable/c/6452c13646af7c13d7f6668b6690cfb2427e7f7b>
- <https://git.kernel.org/stable/c/449f3bada7a9fad8b8cdf4bb20baf27ee9ca56c5>
- <https://git.kernel.org/stable/c/2a1780f9fc2493bd34c418a0be6fc58943afcecf>

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-2026-89457>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89457/>. Everything for agents: <https://agentprime.io/llms.txt>.