# smb: client: fix in-place encryption corruption in SMB2_write()

CVE record · `CVE-2026-43362`

- **Identifiers:** `CVE-2026-43362`
- **State:** Confirmed
- **Severity:** CVSS 8.1 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-662](https://cwe.mitre.org/data/definitions/662.html)
- **Tags:** [CWE-662](https://agentprime.io/advisories/tag/cwe-662.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 8 May 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 8 May 2026, 14:21 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: `026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398 to before 438e77435aee2894d5edf90be5c87004a57f6258` (git)
  - affected: `026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398 to before 52327268224fb9ccc7ecfbbdfdfff54b6e93c518` (git)
  - affected: `026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398 to before 92e64f1852f455f57d0850989e57c30d7fac7d95` (git)
  - affected: `026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398 to before aea5e37388a080361110ab5790f57ae0af383650` (git)
  - affected: `026e93dc0a3eefb0be060bcb9ecd8d7a7fd5c398 to before d78840a6a38d312dc1a51a65317bb67e46f0b929` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.11`
  - unaffected: `before 4.11` (semver)
  - unaffected: `6.6.130 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.78 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.19 to 6.18.*, inclusive` (semver)
  - unaffected: `6.19.9 to 6.19.*, inclusive` (semver)
  - unaffected: `7.0 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0026, the 17th percentile, on 5 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 8 May 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-43362](https://www.cve.org/CVERecord?id=CVE-2026-43362)
- [NVD: CVE-2026-43362](https://nvd.nist.gov/vuln/detail/CVE-2026-43362)

### References from the CNA

- <https://git.kernel.org/stable/c/438e77435aee2894d5edf90be5c87004a57f6258>
- <https://git.kernel.org/stable/c/52327268224fb9ccc7ecfbbdfdfff54b6e93c518>
- <https://git.kernel.org/stable/c/92e64f1852f455f57d0850989e57c30d7fac7d95>
- <https://git.kernel.org/stable/c/aea5e37388a080361110ab5790f57ae0af383650>
- <https://git.kernel.org/stable/c/d78840a6a38d312dc1a51a65317bb67e46f0b929>

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-2026-43362>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-43362/>. Everything for agents: <https://agentprime.io/llms.txt>.