CVE-2022-49286

Kernel crash via unchecked TPM teardown race

Published Feb 26, 2025 · Updated Aug 12, 2026

Race condition in the TPM subsystem of affected Linux kernels allows local users to crash the system during TPM space teardown. The tpm2_del_space() path flushes a space without tpm_try_get_ops() teardown checks and can dereference chip->tpm_mutex after chip removal. Exploitation requires a local low-privileged user to win the narrow teardown race, producing a kernel NULL-pointer crash.

CVSS severity4.7
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the TPM subsystem of affected Linux kernels allows local users to crash the system during TPM space teardown. The tpm2_del_space() path flushes a space without tpm_try_get_ops() teardown checks and can dereference chip->tpm_mutex after chip removal. Exploitation requires a local low-privileged user to win the narrow teardown race, producing a kernel NULL-pointer crash.

The record

CVE
CVE-2022-49286
Published
Feb 26, 2025
Updated
Aug 12, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.12
  2. Affected versionversion=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <476ddd23f818fb94cf86fb5617f3bb9a7c92113d
  3. Affected versionversion=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <5b1d2561a03e534064b51c50c774657833d3d2cf
  4. Affected versionversion=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <95193d12f10a8a088843b25e0f5fe1d83ec6b079
  5. Affected versionversion=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <ba84f9a48366dcc3cdef978599433efe101dd5bd
  6. Affected versionversion=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <eda1662cce964c8a65bb86321f8d9cfa6e9ceaab
  7. Affected versionversion=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <fb5abce6b2bb5cb3d628aaa63fa821da8c4600f9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <476ddd23f818fb94cf86fb5617f3bb9a7c92113d; version=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <5b1d2561a03e534064b51c50c774657833d3d2cf; version=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <95193d12f10a8a088843b25e0f5fe1d83ec6b079; version=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <ba84f9a48366dcc3cdef978599433efe101dd5bd; version=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <eda1662cce964c8a65bb86321f8d9cfa6e9ceaab; version=4d57856a21ed2abe33412e0526cc84bdcf67ea08 <fb5abce6b2bb5cb3d628aaa63fa821da8c4600f9

Published CVSS scores

4.7CanonicalCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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