# fs/ntfs3: fix out-of-bounds read in read_log_rec_buf()

CVE record · `CVE-2026-89781`

- **Identifiers:** `CVE-2026-89781`
- **State:** Confirmed
- **Severity:** CVSS 8.4 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 08:48 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: `b46acd6a6a627d876898e1c84d3f84902264b445 to before df099bfdb57773ba7f40f8a9dcc82e75af277922` (git)
  - affected: `b46acd6a6a627d876898e1c84d3f84902264b445 to before 1b2d31f1083beb80c55d1152249f652c1445a559` (git)
  - affected: `b46acd6a6a627d876898e1c84d3f84902264b445 to before 700973cc65db405bde0368ccf88699390150943e` (git)
  - affected: `b46acd6a6a627d876898e1c84d3f84902264b445 to before 49f7cbc902b08b56eb7d2633163ecc57a0e7145a` (git)
  - affected: `b46acd6a6a627d876898e1c84d3f84902264b445 to before 74a83aa05f73033af719771ab1f0c269928b4865` (git)
  - affected: `b46acd6a6a627d876898e1c84d3f84902264b445 to before 53e56f7aa1d0f950a8bc2e4cdb3ba9fe45967531` (git)
  - affected: `b46acd6a6a627d876898e1c84d3f84902264b445 to before de603b9d377fab57a5e6432fa84a9f36b32c1636` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.15`
  - unaffected: `before 5.15` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0019, the 8th 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89781](https://www.cve.org/CVERecord?id=CVE-2026-89781)
- [NVD: CVE-2026-89781](https://nvd.nist.gov/vuln/detail/CVE-2026-89781)

### References from the CNA

- <https://git.kernel.org/stable/c/df099bfdb57773ba7f40f8a9dcc82e75af277922>
- <https://git.kernel.org/stable/c/1b2d31f1083beb80c55d1152249f652c1445a559>
- <https://git.kernel.org/stable/c/700973cc65db405bde0368ccf88699390150943e>
- <https://git.kernel.org/stable/c/49f7cbc902b08b56eb7d2633163ecc57a0e7145a>
- <https://git.kernel.org/stable/c/74a83aa05f73033af719771ab1f0c269928b4865>
- <https://git.kernel.org/stable/c/53e56f7aa1d0f950a8bc2e4cdb3ba9fe45967531>
- <https://git.kernel.org/stable/c/de603b9d377fab57a5e6432fa84a9f36b32c1636>

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-2026-89781>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89781/>. Everything for agents: <https://agentprime.io/llms.txt>.