# CVE-2025-38210: configfs-tsm-report: Fix NULL dereference of tsm_ops

Status: published. Published: 2025-07-04. Updated: 2026-11-05.

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

configfs-tsm-report: Fix NULL dereference of tsm_ops

Unlike sysfs, the lifetime of configfs objects is controlled by
userspace. There is no mechanism for the kernel to find and delete all
created config-items. Instead, the configfs-tsm-report mechanism has an
expectation that tsm_unregister() can happen at any time and cause
established config-item access to start failing.

That expectation is not fully satisfied. While tsm_report_read(),
tsm_report_{is,is_bin}_visible(), and tsm_report_make_item() safely fail
if tsm_ops have been unregistered, tsm_report_privlevel_store()
tsm_report_provider_show() fail to check for ops registration. Add the
missing checks for tsm_ops having been removed.

Now, in supporting the ability for tsm_unregister() to always succeed,
it leaves the problem of what to do with lingering config-items. The
expectation is that the admin that arranges for the ->remove() (unbind)
of the ${tsm_arch}-guest driver is also responsible for deletion of all
open config-items. Until that deletion happens, ->probe() (reload /
bind) of the ${tsm_arch}-guest driver fails.

This allows for emergency shutdown / revocation of attestation
interfaces, and requires coordinated restart.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 70e6f7e2b98575621019aa40ac616be58ff984e0; < 015f04ac884a454d4d8aaa7b67758f047742b1cf (affected, git); ≥ 70e6f7e2b98575621019aa40ac616be58ff984e0; < cefbafcbdef011d6ef9414902311afdfba3c33eb (affected, git); ≥ 70e6f7e2b98575621019aa40ac616be58ff984e0; < fba4ceaa242d2bdf4c04b77bda41d32d02d3925d (affected, git). Source: CNA: Linux
- Linux / Linux: 6.7 (affected); ≥ 0; < 6.7 (unaffected, semver); ≥ 6.12.35; ≤ 6.12.* (unaffected, semver); ≥ 6.15.4; ≤ 6.15.* (unaffected, semver); ≥ 6.16; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.18% as of 2026-11-05; percentile 7.12%

- 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/015f04ac884a454d4d8aaa7b67758f047742b1cf (CNA: Linux)

- https://git.kernel.org/stable/c/cefbafcbdef011d6ef9414902311afdfba3c33eb (CNA: Linux)

- https://git.kernel.org/stable/c/fba4ceaa242d2bdf4c04b77bda41d32d02d3925d (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2025-38210; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2025-38210; retrieved 2026-11-05; source updated Not reported

Revision: 49badef7b687e7ac87d00a80cb75d074a6f2a9f66a6d13ef557e6bf0dd4e71a1

Canonical: https://y2.dev/cve/CVE-2025-38210

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