# CVE-2026-43440: net/mana: Null service_wq on setup error to prevent double destroy

Status: published. Published: 2026-05-08. Updated: 2026-11-06.

In the Linux kernel, the following vulnerability has been resolved:

net/mana: Null service_wq on setup error to prevent double destroy

In mana_gd_setup() error path, set gc->service_wq to NULL after
destroy_workqueue() to match the cleanup in mana_gd_cleanup().
This prevents a use-after-free if the workqueue pointer is checked
after a failed setup.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ fa3c2f8d9152344a478abb847081c1b5f84a94f5; < 59489ce60d7412ed82fb1d8002faa3102dcd4916 (affected, git); ≥ a9a7c3203fdc4d4a8d8a7a3b1ed05d2bb4c6e77e; < 6c92392602b451e3869f15ab685f8f650e942b13 (affected, git); ≥ f975a0955276579e2176a134366ed586071c7c6a; < 87c2302813abc55c46485711a678e3c312b00666 (affected, git). Source: CNA: Linux
- Linux / Linux: ≥ 6.18.16; < 6.18.19 (affected, semver); ≥ 6.19.6; < 6.19.9 (affected, semver). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.12% as of 2026-11-06; percentile 2.13%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/59489ce60d7412ed82fb1d8002faa3102dcd4916 (CNA: Linux)

- https://git.kernel.org/stable/c/6c92392602b451e3869f15ab685f8f650e942b13 (CNA: Linux)

- https://git.kernel.org/stable/c/87c2302813abc55c46485711a678e3c312b00666 (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-43440; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-43440; retrieved 2026-11-06; source updated Not reported

Revision: 6a0127534c98dbdbe0c3eb8c912418a8323a1805191300b55ed5cbae9e6ee63f

Canonical: https://y2.dev/cve/CVE-2026-43440

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