# xfs: stop exchanging reflink flags when exchanging mappings

CVE record · `CVE-2026-98975`

- **Identifiers:** `CVE-2026-98975`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 23 Oct 2026
- **Updated:** 24 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 23 Oct 2026, 12:19 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: `f0bc4d134b46607967bda1205ce3226a1bd95f42 to before 1fa2f3a7ef7ee0f2503a4b0afe24bc8c9d0820be` (git)
  - affected: `f0bc4d134b46607967bda1205ce3226a1bd95f42 to before 7d3b9b2c9dc57f93f36c716ab752548cb4db9900` (git)
  - affected: `f0bc4d134b46607967bda1205ce3226a1bd95f42 to before 4756c94260e69ce42612b8220c3614f02f7a11d5` (git)
  - affected: `f0bc4d134b46607967bda1205ce3226a1bd95f42 to before d84d6c1a7f1e2de9e601703a326a4c1b7b421943` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.9`
  - unaffected: `before 4.9` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.57 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.11 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

- 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:** 0.0016, the 5th percentile, on 7 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 23 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98975](https://www.cve.org/CVERecord?id=CVE-2026-98975)
- [NVD: CVE-2026-98975](https://nvd.nist.gov/vuln/detail/CVE-2026-98975)

### References from the CNA

- <https://git.kernel.org/stable/c/1fa2f3a7ef7ee0f2503a4b0afe24bc8c9d0820be>
- <https://git.kernel.org/stable/c/7d3b9b2c9dc57f93f36c716ab752548cb4db9900>
- <https://git.kernel.org/stable/c/4756c94260e69ce42612b8220c3614f02f7a11d5>
- <https://git.kernel.org/stable/c/d84d6c1a7f1e2de9e601703a326a4c1b7b421943>

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-2026-98975>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98975/>. Everything for agents: <https://agentprime.io/llms.txt>.