# mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug

CVE record · `CVE-2026-93172`

- **Identifiers:** `CVE-2026-93172`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:12 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: `75ef7184053989118d3814c558a9af62e7376a58 to before eb872b92e26c2576742d541e45f28b50af059b8b` (git)
  - affected: `75ef7184053989118d3814c558a9af62e7376a58 to before 4dda09e7ca0bf0c3fa7c5c8f134d9804b67f455c` (git)
  - affected: `75ef7184053989118d3814c558a9af62e7376a58 to before 4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc` (git)
  - affected: `75ef7184053989118d3814c558a9af62e7376a58 to before bc3b5e6519b8df22d622a03eab6772784da97db4` (git)
  - affected: `75ef7184053989118d3814c558a9af62e7376a58 to before 1017fe1c7f48e511c5a680e3057005daaff2f3a2` (git)
  - affected: `75ef7184053989118d3814c558a9af62e7376a58 to before 2ebce860bdd7ae5e13002811bc9bbbf33fcfc221` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.8`
  - unaffected: `before 4.8` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 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 memory management code (mm/mm_init, free_area_init_core_hotplug) is affected, in the version ranges listed for the kernel's stable branches, starting from commit 75ef7184053989118d3814c558a9af62e7376a58 and from version 4.8. The source does not describe what an attacker must do or what they could gain, so the impact is unclear; the flaw is a missing check after a per-CPU memory allocation during memory hot-add, which leads to a NULL pointer dereference. Upgrade to a fixed kernel version from the stable branch you use, such as 6.1.191, 6.6.160, 6.12.110, or 6.18.52 or later.

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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0021, the 10th 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93172](https://www.cve.org/CVERecord?id=CVE-2026-93172)
- [NVD: CVE-2026-93172](https://nvd.nist.gov/vuln/detail/CVE-2026-93172)

### References from the CNA

- <https://git.kernel.org/stable/c/eb872b92e26c2576742d541e45f28b50af059b8b>
- <https://git.kernel.org/stable/c/4dda09e7ca0bf0c3fa7c5c8f134d9804b67f455c>
- <https://git.kernel.org/stable/c/4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc>
- <https://git.kernel.org/stable/c/bc3b5e6519b8df22d622a03eab6772784da97db4>
- <https://git.kernel.org/stable/c/1017fe1c7f48e511c5a680e3057005daaff2f3a2>
- <https://git.kernel.org/stable/c/2ebce860bdd7ae5e13002811bc9bbbf33fcfc221>

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-2026-93172>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93172/>. Everything for agents: <https://agentprime.io/llms.txt>.