# signal: Prevent exec() race

CVE record · `CVE-2026-98256`

- **Identifiers:** `CVE-2026-98256`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 6 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 6 Oct 2026, 08:45 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: `fb3bbcfe344e64a46574a638b051ffd78762c12d to before 621c365739828900f32a0c1cdfe5387528a62176` (git)
  - affected: `fb3bbcfe344e64a46574a638b051ffd78762c12d to before 934bd95f1a6404dbb845951b823547abab05a649` (git)
  - affected: `fb3bbcfe344e64a46574a638b051ffd78762c12d to before d2710c8d938ae6a825a6463158e6e6f31eac792a` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.15`
  - unaffected: `before 6.15` (semver)
  - unaffected: `6.18.54 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.8 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:** 0.0014, the 3rd percentile, on 10 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 6 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98256](https://www.cve.org/CVERecord?id=CVE-2026-98256)
- [NVD: CVE-2026-98256](https://nvd.nist.gov/vuln/detail/CVE-2026-98256)

### References from the CNA

- <https://git.kernel.org/stable/c/621c365739828900f32a0c1cdfe5387528a62176>
- <https://git.kernel.org/stable/c/934bd95f1a6404dbb845951b823547abab05a649>
- <https://git.kernel.org/stable/c/d2710c8d938ae6a825a6463158e6e6f31eac792a>

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-2026-98256>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98256/>. Everything for agents: <https://agentprime.io/llms.txt>.