CVE-2022-49286: tpm: use try_get_ops() in tpm-space.c
Vulnerability summary
CVE-2022-49286 is a medium (CVSS 4.7) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.9% of scored vulnerabilities.
Not severe (CVSS 4.7, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 5Timeline
- 26-02-2025PublishedVulnerability first disclosed.
- 12-08-2026Last modifiedVulnerability information updated.
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/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.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated4.7MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
15%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.24% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu107 products
- linuxAll versions (No fix recorded) | < 5.4.0-117.132 | < 5.15.0-37.39
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.4.0-1078.84 | < 5.15.0-1011.14
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 4d57856a21ed2abe33412e0526cc84bdcf67ea08, < 5b1d2561a03e534064b51c50c774657833d3d2cf | ≥ 4d57856a21ed2abe33412e0526cc84bdcf67ea08, < 95193d12f10a8a088843b25e0f5fe1d83ec6b079 | ≥ 4d57856a21ed2abe33412e0526cc84bdcf67ea08, < 476ddd23f818fb94cf86fb5617f3bb9a7c92113d | ≥ 4d57856a21ed2abe33412e0526cc84bdcf67ea08, < eda1662cce964c8a65bb86321f8d9cfa6e9ceaab | ≥ 4d57856a21ed2abe33412e0526cc84bdcf67ea08, < ba84f9a48366dcc3cdef978599433efe101dd5bd | ≥ 4d57856a21ed2abe33412e0526cc84bdcf67ea08, < fb5abce6b2bb5cb3d628aaa63fa821da8c4600f9 | 4.12
- linux_kernelEOL≥ 4.12, < 5.4.188 | ≥ 5.5, < 5.10.109 | ≥ 5.11, < 5.15.32 | ≥ 5.16, < 5.16.18 | 5.17
Debian1 product
- linux< 5.17.3-1
3 vendors · 110 products
