# ecryptfs: pass packet set buffer size to parser

CVE record · `CVE-2026-89608`

- **Identifiers:** `CVE-2026-89608`
- **State:** Confirmed
- **Severity:** CVSS 7.1 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:45 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: `237fead619984cc48818fe12ee0ceada3f55b012 to before e7573b0e3058c6bbdfe81673f22c09900fde9e65` (git)
  - affected: `237fead619984cc48818fe12ee0ceada3f55b012 to before 66a87559ecb26afe80ad512faf728a158e2b81da` (git)
  - affected: `237fead619984cc48818fe12ee0ceada3f55b012 to before 3bd9bb3e167a7c14a50423f6ff03ee0fb007199d` (git)
  - affected: `237fead619984cc48818fe12ee0ceada3f55b012 to before 749fa08d8f1b318bd8f4669a14a8a4a8c1bbdaac` (git)
  - affected: `237fead619984cc48818fe12ee0ceada3f55b012 to before 329de8b9e988b152b938f09224670d97bada0b96` (git)
  - affected: `237fead619984cc48818fe12ee0ceada3f55b012 to before e5d254e654f2311a3c4b9c791d7f216554bcd17a` (git)
  - affected: `237fead619984cc48818fe12ee0ceada3f55b012 to before 747fd45be396a6aea3420ab657a0ab4e60185b05` (git)
  - affected: `237fead619984cc48818fe12ee0ceada3f55b012 to before 2602b79c5b3e2f6fce12e38a670f8e3fda4e46a2` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.19`
  - unaffected: `before 2.6.19` (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: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 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:H/I:N/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 5th 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89608](https://www.cve.org/CVERecord?id=CVE-2026-89608)
- [NVD: CVE-2026-89608](https://nvd.nist.gov/vuln/detail/CVE-2026-89608)

### References from the CNA

- <https://git.kernel.org/stable/c/e7573b0e3058c6bbdfe81673f22c09900fde9e65>
- <https://git.kernel.org/stable/c/66a87559ecb26afe80ad512faf728a158e2b81da>
- <https://git.kernel.org/stable/c/3bd9bb3e167a7c14a50423f6ff03ee0fb007199d>
- <https://git.kernel.org/stable/c/749fa08d8f1b318bd8f4669a14a8a4a8c1bbdaac>
- <https://git.kernel.org/stable/c/329de8b9e988b152b938f09224670d97bada0b96>
- <https://git.kernel.org/stable/c/e5d254e654f2311a3c4b9c791d7f216554bcd17a>
- <https://git.kernel.org/stable/c/747fd45be396a6aea3420ab657a0ab4e60185b05>
- <https://git.kernel.org/stable/c/2602b79c5b3e2f6fce12e38a670f8e3fda4e46a2>

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-2026-89608>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89608/>. Everything for agents: <https://agentprime.io/llms.txt>.