CVE-2022-49286
tpm: use try_get_ops() in tpm-space.c
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
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/[email protected]/ 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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.7.
Weakness
Affected products
- affected 4d57856a21ed2abe33412e0526cc84bdcf67ea08 – < 5b1d2561a03e534064b51c50c774657833d3d2cf
- affected 4d57856a21ed2abe33412e0526cc84bdcf67ea08 – < 95193d12f10a8a088843b25e0f5fe1d83ec6b079
- affected 4d57856a21ed2abe33412e0526cc84bdcf67ea08 – < 476ddd23f818fb94cf86fb5617f3bb9a7c92113d
- affected 4d57856a21ed2abe33412e0526cc84bdcf67ea08 – < eda1662cce964c8a65bb86321f8d9cfa6e9ceaab
- affected 4d57856a21ed2abe33412e0526cc84bdcf67ea08 – < ba84f9a48366dcc3cdef978599433efe101dd5bd
- affected 4d57856a21ed2abe33412e0526cc84bdcf67ea08 – < fb5abce6b2bb5cb3d628aaa63fa821da8c4600f9
- affected 4.12
- unaffected < 4.12
- unaffected 5.4.188 – ≤ 5.4.*
- unaffected 5.10.109 – ≤ 5.10.*
- unaffected 5.15.32 – ≤ 5.15.*
- unaffected 5.16.18 – ≤ 5.16.*
- unaffected 5.17.1 – ≤ 5.17.*
- unaffected 5.18 – ≤ *
References (6)
- https://git.kernel.org/stable/c/5b1d2561a03e534064b51c50c774657833d3d2cf (opens in a new tab)
- https://git.kernel.org/stable/c/95193d12f10a8a088843b25e0f5fe1d83ec6b079 (opens in a new tab)
- https://git.kernel.org/stable/c/476ddd23f818fb94cf86fb5617f3bb9a7c92113d (opens in a new tab)
- https://git.kernel.org/stable/c/eda1662cce964c8a65bb86321f8d9cfa6e9ceaab (opens in a new tab)
- https://git.kernel.org/stable/c/ba84f9a48366dcc3cdef978599433efe101dd5bd (opens in a new tab)
- https://git.kernel.org/stable/c/fb5abce6b2bb5cb3d628aaa63fa821da8c4600f9 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49286)Record last updated .