# btrfs: fix reloc root cleanup in merge_reloc_roots()

CVE record · `CVE-2026-93798`

- **Identifiers:** `CVE-2026-93798`
- **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: `1dae7e0e58b484eaa43d530f211098fdeeb0f404 to before 29531470b1bf1e8bd2df4941fe913106edbca615` (git)
  - affected: `1dae7e0e58b484eaa43d530f211098fdeeb0f404 to before 415f8665a969d3c906e4fd7c90fcbb4b357886f6` (git)
  - affected: `1dae7e0e58b484eaa43d530f211098fdeeb0f404 to before ee695a968aa73b1e67ccbf2133dc0e54381d32b2` (git)
  - affected: `1dae7e0e58b484eaa43d530f211098fdeeb0f404 to before 0bc25f0a2d1b3e0a691431c4d7aef36afcd527c5` (git)
  - affected: `1dae7e0e58b484eaa43d530f211098fdeeb0f404 to before ab48583aa9948205ff9a6470e23dbff74c565e24` (git)
  - affected: `1dae7e0e58b484eaa43d530f211098fdeeb0f404 to before 63d6b1f04cd91c825329712aa526215ffa5d11ca` (git)
  - affected: `1dae7e0e58b484eaa43d530f211098fdeeb0f404 to before b78fe9563e2d5ae47805f1e5dc722c91fd30e1f8` (git)
  - affected: `ee08663380ffd5a45a1c87580fbc305e8413c235` (git)
  - affected: `33823378ff2b510fd7b566f25bb18438aeb9b23b` (git)
  - affected: `5.4.54 to before 5.5` (semver)
  - affected: `5.7.11 to before 5.8` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.8`
  - unaffected: `before 5.8` (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: `7.2 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 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 24 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93798](https://www.cve.org/CVERecord?id=CVE-2026-93798)
- [NVD: CVE-2026-93798](https://nvd.nist.gov/vuln/detail/CVE-2026-93798)

### References from the CNA

- <https://git.kernel.org/stable/c/29531470b1bf1e8bd2df4941fe913106edbca615>
- <https://git.kernel.org/stable/c/415f8665a969d3c906e4fd7c90fcbb4b357886f6>
- <https://git.kernel.org/stable/c/ee695a968aa73b1e67ccbf2133dc0e54381d32b2>
- <https://git.kernel.org/stable/c/0bc25f0a2d1b3e0a691431c4d7aef36afcd527c5>
- <https://git.kernel.org/stable/c/ab48583aa9948205ff9a6470e23dbff74c565e24>
- <https://git.kernel.org/stable/c/63d6b1f04cd91c825329712aa526215ffa5d11ca>
- <https://git.kernel.org/stable/c/b78fe9563e2d5ae47805f1e5dc722c91fd30e1f8>

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-2026-93798>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93798/>. Everything for agents: <https://agentprime.io/llms.txt>.