# xfs: fix wild memcpy access when formatting ondisk rtrefcount btree roots

CVE record · `CVE-2026-98447`

- **Identifiers:** `CVE-2026-98447`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Oct 2026, 15:14 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: `f0415af60f482a2192065be8b334b409495ca8a3 to before d46492fb8018d12d00651b06b9d240e747110b38` (git)
  - affected: `f0415af60f482a2192065be8b334b409495ca8a3 to before 2703b954d306ebfe3b11e33e259759329c11b690` (git)
  - affected: `f0415af60f482a2192065be8b334b409495ca8a3 to before fe2f9135df43db849e74f03956d322ac20b59af7` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.14`
  - unaffected: `before 6.14` (semver)
  - unaffected: `6.18.55 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.9 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:** 0.0017, the 5th percentile, on 9 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 18 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98447](https://www.cve.org/CVERecord?id=CVE-2026-98447)
- [NVD: CVE-2026-98447](https://nvd.nist.gov/vuln/detail/CVE-2026-98447)

### References from the CNA

- <https://git.kernel.org/stable/c/d46492fb8018d12d00651b06b9d240e747110b38>
- <https://git.kernel.org/stable/c/2703b954d306ebfe3b11e33e259759329c11b690>
- <https://git.kernel.org/stable/c/fe2f9135df43db849e74f03956d322ac20b59af7>

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-2026-98447>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98447/>. Everything for agents: <https://agentprime.io/llms.txt>.