# RDMA/siw: Bound fragmented header copies by the remaining length

CVE record · `CVE-2026-98323`

- **Identifiers:** `CVE-2026-98323`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **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, 08:46 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.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `e3917c85f41ef1df64e27dc0e46ab0d803c5e73e to before 2c6fbcf4bfac0b2b186acc8d91154c0fa24468a7` (git)
  - affected: `308cd50f174c95a507527037f4de1a0396aa4325 to before af9f5b474a260ad23ffb9793d716a5e3bbce3b48` (git)
  - affected: `754209850df8367c954ac1de7671c7430b1f342c to before 262dcd809723723ed8a4e05437ec7e9c21a8f17e` (git)
  - affected: `754209850df8367c954ac1de7671c7430b1f342c to before eb4d7a946970469b3ab0c762432bf161d5b0836c` (git)
  - affected: `754209850df8367c954ac1de7671c7430b1f342c to before 8628f8ebf41669302513fb3f0bf0eba38b226742` (git)
  - affected: `754209850df8367c954ac1de7671c7430b1f342c to before b72dcfb9bf1f0f0147cda03dc59e4002a315067f` (git)
  - affected: `754209850df8367c954ac1de7671c7430b1f342c to before e6bdfdf3bcb02d0d626a45e8c98b7e63d2fddf9d` (git)
  - affected: `754209850df8367c954ac1de7671c7430b1f342c to before 9ff797e516dbc1ecb73701ec4c24055712d44411` (git)
  - affected: `e09caa38e10bcf027100cc22b0e3cc745a39ef0a` (git)
  - affected: `0c14f795a9eab9344230f9933798b8ee496f497d` (git)
  - affected: `7fada7c6962219b6fc4ff4e62e46a936af110dd9` (git)
  - affected: `5.10.150 to before 5.10.271` (semver)
  - and 4 more
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.1`
  - unaffected: `before 6.1` (semver)
  - unaffected: `5.10.271 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.222 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.189 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0051, the 44th 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-2026-98323](https://www.cve.org/CVERecord?id=CVE-2026-98323)
- [NVD: CVE-2026-98323](https://nvd.nist.gov/vuln/detail/CVE-2026-98323)

### References from the CNA

- <https://git.kernel.org/stable/c/2c6fbcf4bfac0b2b186acc8d91154c0fa24468a7>
- <https://git.kernel.org/stable/c/af9f5b474a260ad23ffb9793d716a5e3bbce3b48>
- <https://git.kernel.org/stable/c/262dcd809723723ed8a4e05437ec7e9c21a8f17e>
- <https://git.kernel.org/stable/c/eb4d7a946970469b3ab0c762432bf161d5b0836c>
- <https://git.kernel.org/stable/c/8628f8ebf41669302513fb3f0bf0eba38b226742>
- <https://git.kernel.org/stable/c/b72dcfb9bf1f0f0147cda03dc59e4002a315067f>
- <https://git.kernel.org/stable/c/e6bdfdf3bcb02d0d626a45e8c98b7e63d2fddf9d>
- <https://git.kernel.org/stable/c/9ff797e516dbc1ecb73701ec4c24055712d44411>

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-2026-98323>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98323/>. Everything for agents: <https://agentprime.io/llms.txt>.