# cgroup/cpuset: Make nr_deadline_tasks an atomic_t

CVE record · `CVE-2026-93150`

- **Identifiers:** `CVE-2026-93150`
- **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, 16:11 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: `d1b4262b78cc7638642833252ae92fc586854ffb to before 4987d336abf3fa575a2d953f69e11154ac9802c3` (git)
  - affected: `6c24849f5515e4966d94fa5279bdff4acf2e9489 to before 642648fa7595241e4d491add5007bc33f11defb5` (git)
  - affected: `6c24849f5515e4966d94fa5279bdff4acf2e9489 to before e422b32e6a57269ca8164c60674a78bee85cf5fb` (git)
  - affected: `6c24849f5515e4966d94fa5279bdff4acf2e9489 to before e5965ae3f7c918151b87e5c925b7978afbeaf638` (git)
  - affected: `6c24849f5515e4966d94fa5279bdff4acf2e9489 to before 78d9daf5e13ad1448b7dfebac949936710ec7565` (git)
  - affected: `6c24849f5515e4966d94fa5279bdff4acf2e9489 to before 95220e1f18f6321008f021abc7d6f581f64bcb82` (git)
  - affected: `5ac05ce5684315d0e71194a63febaf33921c3268` (git)
  - affected: `43d8cbfefa7c59bd3b5fe184535eca476d45304e` (git)
  - affected: `74fac5bb0d375d6b8f5e7997925063c509089c9c` (git)
  - affected: `6.1.50 to before 6.1.191` (semver)
  - affected: `5.10.193 to before 5.11` (semver)
  - affected: `5.15.129 to before 5.16` (semver)
  - and 1 more
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.5`
  - unaffected: `before 6.5` (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.

> Linux kernel cgroup/cpuset is affected from 6.5 and from several earlier commits, with fixes in the stable branches 6.1.191, 6.6.160, 6.12.110 and 6.18.52 and in later mainline. The source describes a race where the nr_deadline_tasks counter can be updated concurrently under different locks and become corrupted, which can lead to incorrect scheduler behaviour. The source gives few details on the attack conditions or impact. Upgrade to a fixed kernel version for your 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

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-2026-93150](https://www.cve.org/CVERecord?id=CVE-2026-93150)
- [NVD: CVE-2026-93150](https://nvd.nist.gov/vuln/detail/CVE-2026-93150)

### References from the CNA

- <https://git.kernel.org/stable/c/4987d336abf3fa575a2d953f69e11154ac9802c3>
- <https://git.kernel.org/stable/c/642648fa7595241e4d491add5007bc33f11defb5>
- <https://git.kernel.org/stable/c/e422b32e6a57269ca8164c60674a78bee85cf5fb>
- <https://git.kernel.org/stable/c/e5965ae3f7c918151b87e5c925b7978afbeaf638>
- <https://git.kernel.org/stable/c/78d9daf5e13ad1448b7dfebac949936710ec7565>
- <https://git.kernel.org/stable/c/95220e1f18f6321008f021abc7d6f581f64bcb82>

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-2026-93150>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93150/>. Everything for agents: <https://agentprime.io/llms.txt>.