# scsi: libiscsi: Validate the ITT reflected in a Reject PDU

CVE record · `CVE-2026-99153`

- **Identifiers:** `CVE-2026-99153`
- **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:** 28 Oct 2026
- **Updated:** 31 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 28 Oct 2026, 10:35 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: `8afa1439fcff58da8f28c1d083046f229f6ab3de to before 3637a4ad1d07477f1c60609876da6b60154d224b` (git)
  - affected: `8afa1439fcff58da8f28c1d083046f229f6ab3de to before 21ef746340ce246344f34278e205b8960c1d8874` (git)
  - affected: `8afa1439fcff58da8f28c1d083046f229f6ab3de to before d20583a9dbe0d32a9af8384c857c95c0fc115103` (git)
  - affected: `8afa1439fcff58da8f28c1d083046f229f6ab3de to before ebb8c5ef2aabf66895253600e8390e8fc7094807` (git)
  - affected: `8afa1439fcff58da8f28c1d083046f229f6ab3de to before 576125e7382a7826bd6c3c1ca4d9c582ed5be21d` (git)
  - affected: `8afa1439fcff58da8f28c1d083046f229f6ab3de to before 7215a69b6456fda79c0935c2959045dff3fcaac8` (git)
  - affected: `8afa1439fcff58da8f28c1d083046f229f6ab3de to before d79343ae3223b3f7f74b55e79f8a1371fa3f4b1a` (git)
  - affected: `8afa1439fcff58da8f28c1d083046f229f6ab3de to before c5958c770b2a0ee492414e26b07da9164a0d1f5d` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.32`
  - unaffected: `before 2.6.32` (semver)
  - unaffected: `5.10.273 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.224 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.161 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.115 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.59 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.13 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:** 0.0055, the 46th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 28 Oct 2026, 10:35 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-99153)

## Sources

- [CVE List: CVE-2026-99153](https://www.cve.org/CVERecord?id=CVE-2026-99153)
- [NVD: CVE-2026-99153](https://nvd.nist.gov/vuln/detail/CVE-2026-99153)

### References from the CNA

- <https://git.kernel.org/stable/c/3637a4ad1d07477f1c60609876da6b60154d224b>
- <https://git.kernel.org/stable/c/21ef746340ce246344f34278e205b8960c1d8874>
- <https://git.kernel.org/stable/c/d20583a9dbe0d32a9af8384c857c95c0fc115103>
- <https://git.kernel.org/stable/c/ebb8c5ef2aabf66895253600e8390e8fc7094807>
- <https://git.kernel.org/stable/c/576125e7382a7826bd6c3c1ca4d9c582ed5be21d>
- <https://git.kernel.org/stable/c/7215a69b6456fda79c0935c2959045dff3fcaac8>
- <https://git.kernel.org/stable/c/d79343ae3223b3f7f74b55e79f8a1371fa3f4b1a>
- <https://git.kernel.org/stable/c/c5958c770b2a0ee492414e26b07da9164a0d1f5d>

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-2026-99153>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-99153/>. Everything for agents: <https://agentprime.io/llms.txt>.