CVE-2022-49286

MEDIUM EPSS 12.3%
Published Feb 26, 20251y ago · Modified Jun 17, 20262w ago
4.7 CVSS 3.1
Medium
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
4.7
Exploitability
1.0
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
12.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥4.12  –  <5.4.188
linuxlinux_kernel*≥5.5  –  <5.10.109
linuxlinux_kernel*≥5.11  –  <5.15.32
linuxlinux_kernel*≥5.16  –  <5.16.18
linuxlinux_kernel5.17any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/476ddd23f818fb94cf86fb5617f3bb9a7c92113d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5b1d2561a03e534064b51c50c774657833d3d2cf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95193d12f10a8a088843b25e0f5fe1d83ec6b079
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ba84f9a48366dcc3cdef978599433efe101dd5bd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eda1662cce964c8a65bb86321f8d9cfa6e9ceaab
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fb5abce6b2bb5cb3d628aaa63fa821da8c4600f9
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/476ddd23f818fb94cf86fb5617f3bb9a7c92113d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5b1d2561a03e534064b51c50c774657833d3d2cf
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/95193d12f10a8a088843b25e0f5fe1d83ec6b079
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ba84f9a48366dcc3cdef978599433efe101dd5bd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eda1662cce964c8a65bb86321f8d9cfa6e9ceaab
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fb5abce6b2bb5cb3d628aaa63fa821da8c4600f9
    Patch