# btrfs: zoned: don't clobber the extent buffer when zeroing it out

CVE record · `CVE-2026-90260`

- **Identifiers:** `CVE-2026-90260`
- **State:** Confirmed
- **Severity:** CVSS 7.1 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 21 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:07 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: `aa6313e6ff2bfbf736a2739047bba355d8241584 to before efa5084d08030aa557fdefa3e4a73b2501b7d207` (git)
  - affected: `aa6313e6ff2bfbf736a2739047bba355d8241584 to before 92484ad014f2e2b0e0e7bbc1610951e978cf557c` (git)
  - affected: `aa6313e6ff2bfbf736a2739047bba355d8241584 to before 98e3747587f9f87f010d8d7e55786216249a94af` (git)
  - affected: `aa6313e6ff2bfbf736a2739047bba355d8241584 to before db4b9eefc8ee0bcaeee4d5e6a7313905f6a2fe7c` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.8`
  - unaffected: `before 6.8` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 5th percentile, on 13 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90260](https://www.cve.org/CVERecord?id=CVE-2026-90260)
- [NVD: CVE-2026-90260](https://nvd.nist.gov/vuln/detail/CVE-2026-90260)

### References from the CNA

- <https://git.kernel.org/stable/c/efa5084d08030aa557fdefa3e4a73b2501b7d207>
- <https://git.kernel.org/stable/c/92484ad014f2e2b0e0e7bbc1610951e978cf557c>
- <https://git.kernel.org/stable/c/98e3747587f9f87f010d8d7e55786216249a94af>
- <https://git.kernel.org/stable/c/db4b9eefc8ee0bcaeee4d5e6a7313905f6a2fe7c>

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-2026-90260>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90260/>. Everything for agents: <https://agentprime.io/llms.txt>.