tpm: use try_get_ops() in tpm-space.c
In the Linux kernel, the following vulnerability has been resolved: tpm: use try_get_ops() in tpm-space.c As part of the series conversion to remove nested TPM operations: https://lore.kernel.org/all/20190205224723.19671-1-jarkko.sakkinen@linux.intel.com/ exposure of the chip->tpm_mutex was removed from much of the upper level code. In this conversion, tpm2_del_space() was missed. This didn't matter much because it's usually called closely after a converted operation, so there's only a very tiny race window where the chip can be removed before the space flushing is done which causes a NULL deref on the mutex. However, there are reports of this window being hit in practice, so fix this by converting tpm2_del_space() to use tpm_try_get_ops(), which performs all the teardown checks before acquring the mutex.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.109, 5.15.32, 5.16.18, 5.17.1, 5.4.188
- CVEs
- CVE-2022-49286
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 8 Nov 2026, 02:55 UTC · Revision 1
Source evidence
In the Linux kernel, the following vulnerability has been resolved: tpm: use try_get_ops() in tpm-space.c As part of the series conversion to remove nested TPM operations: https://lore.kernel.org/all/20190205224723.19671-1-jarkko.sakkinen@linux.intel.com/ exposure of the chip->tpm_mutex was removed from much of the upper level code. In this conversion, tpm2_del_space() was missed. This didn't matter much because it's usually called closely after a converted operation, so there's only a very tiny race window where the chip can be removed before the space flushing is done which causes a NULL deref on the mutex. However, there are reports of this window being hit in practice, so fix this by converting tpm2_del_space() to use tpm_try_get_ops(), which performs all the teardown checks before acquring the mutex.
osv:CVE-2022-49286
Kernel
Fixed versions: 5.4.188, 5.10.109, 5.15.32, 5.16.18, 5.17.1
Complete source record
{
"id": "63c39d9dedbb6d99736dc999cad42d80b8e9d7a68ae20f55434cc28cf44aeb6e",
"url": "https://osv.dev/vulnerability/CVE-2022-49286",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "tpm: use try_get_ops() in tpm-space.c",
"summary": "In the Linux kernel, the following vulnerability has been resolved: tpm: use try_get_ops() in tpm-space.c As part of the series conversion to remove nested TPM operations: https://lore.kernel.org/all/20190205224723.19671-1-jarkko.sakkinen@linux.intel.com/ exposure of the chip->tpm_mutex was removed from much of the upper level code. In this conversion, tpm2_del_space() was missed. This didn't matter much because it's usually called closely after a converted operation, so there's only a very tiny race window where the chip can be removed before the space flushing is done which causes a NULL deref on the mutex. However, there are reports of this window being hit in practice, so fix this by converting tpm2_del_space() to use tpm_try_get_ops(), which performs all the teardown checks before acquring the mutex.",
"evidence": "osv:CVE-2022-49286",
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"modified": "2026-10-28T02:30:53.423264386Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/476ddd23f818fb94cf86fb5617f3bb9a7c92113d",
"https://git.kernel.org/stable/c/5b1d2561a03e534064b51c50c774657833d3d2cf",
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"https://nvd.nist.gov/vuln/detail/CVE-2022-49286",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"source_id": "core-osv",
"document_id": 521990,
"published_at": "2025-02-26T01:56:25.566+00:00"
}