# powerpc/xive: propagate IPI init errors to prevent use-after-free

CVE record · `CVE-2026-93260`

- **Identifiers:** `CVE-2026-93260`
- **State:** Confirmed
- **Severity:** CVSS 7.4 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 24 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 24 Sept 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: `243e25112d06b348f087a6f7aba4bbc288285bdd to before 89e1caa5b0aafe23e9938d9a311e9d41baee583e` (git)
  - affected: `243e25112d06b348f087a6f7aba4bbc288285bdd to before e36b1c2eafcaaddefa70d55e6fda74cf6cda38af` (git)
  - affected: `243e25112d06b348f087a6f7aba4bbc288285bdd to before 2ea6238343691309e68308131c7e80c3ae05afea` (git)
  - affected: `243e25112d06b348f087a6f7aba4bbc288285bdd to before 5c9ab0c9cede9f149733d330e2d7d45341b71359` (git)
  - affected: `243e25112d06b348f087a6f7aba4bbc288285bdd to before c554a8d376d5aea1b237ed6bef6f9fbfc550e67f` (git)
  - affected: `243e25112d06b348f087a6f7aba4bbc288285bdd to before 411a3c016e7a95f5fa105a0587e07d0647a77727` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.12`
  - unaffected: `before 4.12` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.57 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The Linux kernel's powerpc XIVE interrupt code can use freed memory when IPI initialization fails, because SMP probing ignored the error. Versions from 4.12 onward are affected until the fixes, and the source does not say what an attacker needs to trigger this. Upgrade to Linux 6.1.191, 6.6.160, 6.12.114, or 6.18.57 or later in the matching branch.

Written 12 Nov 2026.

## 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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0014, the 3rd percentile, on 13 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 24 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93260](https://www.cve.org/CVERecord?id=CVE-2026-93260)
- [NVD: CVE-2026-93260](https://nvd.nist.gov/vuln/detail/CVE-2026-93260)

### References from the CNA

- <https://git.kernel.org/stable/c/89e1caa5b0aafe23e9938d9a311e9d41baee583e>
- <https://git.kernel.org/stable/c/e36b1c2eafcaaddefa70d55e6fda74cf6cda38af>
- <https://git.kernel.org/stable/c/2ea6238343691309e68308131c7e80c3ae05afea>
- <https://git.kernel.org/stable/c/5c9ab0c9cede9f149733d330e2d7d45341b71359>
- <https://git.kernel.org/stable/c/c554a8d376d5aea1b237ed6bef6f9fbfc550e67f>
- <https://git.kernel.org/stable/c/411a3c016e7a95f5fa105a0587e07d0647a77727>

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-2026-93260>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93260/>. Everything for agents: <https://agentprime.io/llms.txt>.