CVE-2022-49203

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49203
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49203.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49203
Downstream
Related
Published
2025-02-26T01:55:44Z
Modified
2025-10-13T15:17:07.705846Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
drm/amd/display: Fix double free during GPU reset on DC streams
Details

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Fix double free during GPU reset on DC streams

[Why] The issue only occurs during the GPU reset code path.

We first backup the current state prior to commiting 0 streams internally from DM to DC. This state backup contains valid link encoder assignments.

DC will clear the link encoder assignments as part of current state (but not the backup, since it was a copied before the commit) and free the extra stream reference it held.

DC requires that the link encoder assignments remain cleared/invalid prior to commiting. Since the backup still has valid assignments we call the interface post reset to clear them. This routine also releases the extra reference that the link encoder interface held - resulting in a double free (and eventually a NULL pointer dereference).

[How] We'll have to do a full DC commit anyway after GPU reset because the stream count previously went to 0.

We don't need to retain the assignment that we had backed up, so just copy off of the now clean current state assignment after the reset has occcurred with the new linkenccfg_copy() interface.

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6d63fcc2a334f7bd15e4e9b1db50a19335d2af4f
Fixed
bbfcdd6289ba6f00f0cd7d496946dce9f6c600ac
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6d63fcc2a334f7bd15e4e9b1db50a19335d2af4f
Fixed
32685b32d825ca08c5dec826477332df886c4743

Affected versions

v5.*

v5.16
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.17.1

Database specific 

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            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@bbfcdd6289ba6f00f0cd7d496946dce9f6c600ac",
            "digest": {
                "length": 2904.0,
                "function_hash": "283870371019730143151020994656744223952"
            },
            "deprecated": false,
            "id": "CVE-2022-49203-05273b45",
            "signature_type": "Function",
            "signature_version": "v1",
            "target": {
                "function": "dm_resume",
                "file": "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c"
            }
        },
        {
            "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@32685b32d825ca08c5dec826477332df886c4743",
            "digest": {
                "threshold": 0.9,
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            "deprecated": false,
            "id": "CVE-2022-49203-052de22d",
            "signature_type": "Line",
            "signature_version": "v1",
            "target": {
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            }
        },
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            "digest": {
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            },
            "deprecated": false,
            "id": "CVE-2022-49203-2a691ce6",
            "signature_type": "Function",
            "signature_version": "v1",
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            "deprecated": false,
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            "target": {
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            "digest": {
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            "deprecated": false,
            "id": "CVE-2022-49203-ee96d409",
            "signature_type": "Line",
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            "target": {
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            },
            "deprecated": false,
            "id": "CVE-2022-49203-f9797e43",
            "signature_type": "Line",
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            "target": {
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            }
        }
    ]
}

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.17.0
Fixed
5.17.2