# RDMA/ucma: Lock the handler in ucma_set_ib_path()

CVE record · `CVE-2026-89508`

- **Identifiers:** `CVE-2026-89508`
- **State:** Confirmed
- **Severity:** CVSS 7.8 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, 19:43 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: `09e328e47a695b0d346598f5d6593ee598e64885 to before 3dd07b369371a2f29e1c3caf1ade85bb92b4c551` (git)
  - affected: `09e328e47a695b0d346598f5d6593ee598e64885 to before b2da0d488a1c72956ebb0a57015ee8ee6a2f7748` (git)
  - affected: `09e328e47a695b0d346598f5d6593ee598e64885 to before a7f8d26e653ee43b0b572984b8ec544d3b3b6f3c` (git)
  - affected: `09e328e47a695b0d346598f5d6593ee598e64885 to before 71dc206f2e2a645dac78879768762451aa1799f7` (git)
  - affected: `09e328e47a695b0d346598f5d6593ee598e64885 to before 764586f8f6180084c5a7d622120f526acc6ce0c9` (git)
  - affected: `09e328e47a695b0d346598f5d6593ee598e64885 to before 28ac2dd416482d1c763c4af5d61af465b387fb50` (git)
  - affected: `09e328e47a695b0d346598f5d6593ee598e64885 to before 43a7d8ae9f645dc00235cfa4bf57673c20b769f8` (git)
  - affected: `09e328e47a695b0d346598f5d6593ee598e64885 to before ecbe7d36dc2de07e5dfbb4a8ff5b315ab43de820` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.10`
  - unaffected: `before 5.10` (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

- 7.8 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89508](https://www.cve.org/CVERecord?id=CVE-2026-89508)
- [NVD: CVE-2026-89508](https://nvd.nist.gov/vuln/detail/CVE-2026-89508)

### References from the CNA

- <https://git.kernel.org/stable/c/3dd07b369371a2f29e1c3caf1ade85bb92b4c551>
- <https://git.kernel.org/stable/c/b2da0d488a1c72956ebb0a57015ee8ee6a2f7748>
- <https://git.kernel.org/stable/c/a7f8d26e653ee43b0b572984b8ec544d3b3b6f3c>
- <https://git.kernel.org/stable/c/71dc206f2e2a645dac78879768762451aa1799f7>
- <https://git.kernel.org/stable/c/764586f8f6180084c5a7d622120f526acc6ce0c9>
- <https://git.kernel.org/stable/c/28ac2dd416482d1c763c4af5d61af465b387fb50>
- <https://git.kernel.org/stable/c/43a7d8ae9f645dc00235cfa4bf57673c20b769f8>
- <https://git.kernel.org/stable/c/ecbe7d36dc2de07e5dfbb4a8ff5b315ab43de820>

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-2026-89508>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89508/>. Everything for agents: <https://agentprime.io/llms.txt>.