# mtd: mtdswap: Avoid freeing registered blktrans device twice

CVE record · `CVE-2026-93049`

- **Identifiers:** `CVE-2026-93049`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:10 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: `e8e3edb95ce6a146bc774b6cfad3553f4383edc8 to before ecadb9137aeaa0615183f8d23eabea2b45c862f1` (git)
  - affected: `e8e3edb95ce6a146bc774b6cfad3553f4383edc8 to before eec130fc9ffbbd08a5d5432683122b79aca2a726` (git)
  - affected: `e8e3edb95ce6a146bc774b6cfad3553f4383edc8 to before d5086911d532b82ca070d944aa08ddde00baefe4` (git)
  - affected: `e8e3edb95ce6a146bc774b6cfad3553f4383edc8 to before 0ce48c6ddea1a8e675a2eb0221b62a9950788f3c` (git)
  - affected: `e8e3edb95ce6a146bc774b6cfad3553f4383edc8 to before a82d93fcfdfd26af17049c34319dfdd079cd1901` (git)
  - affected: `e8e3edb95ce6a146bc774b6cfad3553f4383edc8 to before 5c349c533e72af2313c3be0f80a24d7407fa4777` (git)
  - affected: `e8e3edb95ce6a146bc774b6cfad3553f4383edc8 to before 37be7bc2c2d09c18e939da20224405864a0090b9` (git)
  - affected: `e8e3edb95ce6a146bc774b6cfad3553f4383edc8 to before 779aa4c66a96bf43d2d62982ea1a9096a9128d87` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.14`
  - unaffected: `before 4.14` (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: `6.12.110 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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0022, the 12th 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93049](https://www.cve.org/CVERecord?id=CVE-2026-93049)
- [NVD: CVE-2026-93049](https://nvd.nist.gov/vuln/detail/CVE-2026-93049)

### References from the CNA

- <https://git.kernel.org/stable/c/ecadb9137aeaa0615183f8d23eabea2b45c862f1>
- <https://git.kernel.org/stable/c/eec130fc9ffbbd08a5d5432683122b79aca2a726>
- <https://git.kernel.org/stable/c/d5086911d532b82ca070d944aa08ddde00baefe4>
- <https://git.kernel.org/stable/c/0ce48c6ddea1a8e675a2eb0221b62a9950788f3c>
- <https://git.kernel.org/stable/c/a82d93fcfdfd26af17049c34319dfdd079cd1901>
- <https://git.kernel.org/stable/c/5c349c533e72af2313c3be0f80a24d7407fa4777>
- <https://git.kernel.org/stable/c/37be7bc2c2d09c18e939da20224405864a0090b9>
- <https://git.kernel.org/stable/c/779aa4c66a96bf43d2d62982ea1a9096a9128d87>

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-2026-93049>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93049/>. Everything for agents: <https://agentprime.io/llms.txt>.