# io_uring: fix task_work add use-after-free with SQPOLL

CVE record · `CVE-2026-98858`

- **Identifiers:** `CVE-2026-98858`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Oct 2026, 15:51 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: `af5d68f8892f8ee8f137648b79ceb2abc153a19b to before 42b3332efacfd2140be4cd0dedad4fb96b8ae90e` (git)
  - affected: `af5d68f8892f8ee8f137648b79ceb2abc153a19b to before 891bd8335a0de3bb15c3b797ce3026bbb0dbef6c` (git)
  - affected: `af5d68f8892f8ee8f137648b79ceb2abc153a19b to before 395b25968fe854d4efaa19a8e9b7a5b6d1b3eea3` (git)
  - affected: `af5d68f8892f8ee8f137648b79ceb2abc153a19b to before a92193c91e8839fe5fc209616ea95465ae4b919d` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.9`
  - unaffected: `before 6.9` (semver)
  - unaffected: `6.12.113 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.56 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.10 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:** 0.0016, the 4th percentile, on 7 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 18 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98858](https://www.cve.org/CVERecord?id=CVE-2026-98858)
- [NVD: CVE-2026-98858](https://nvd.nist.gov/vuln/detail/CVE-2026-98858)

### References from the CNA

- <https://git.kernel.org/stable/c/42b3332efacfd2140be4cd0dedad4fb96b8ae90e>
- <https://git.kernel.org/stable/c/891bd8335a0de3bb15c3b797ce3026bbb0dbef6c>
- <https://git.kernel.org/stable/c/395b25968fe854d4efaa19a8e9b7a5b6d1b3eea3>
- <https://git.kernel.org/stable/c/a92193c91e8839fe5fc209616ea95465ae4b919d>

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-2026-98858>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98858/>. Everything for agents: <https://agentprime.io/llms.txt>.