CVE-2023-53851
In the Linux kernel, the following vulnerability has been resolved:
drm/msm/dp: Drop aux devices together with DP controller
Using devres to depopulate the aux bus made sure that upon a probe deferral the EDP panel device would be destroyed and recreated upon next attempt.
But the struct device which the devres is tied to is the DPUs (drm_dev->dev), which may be happen after the DP controller is torn down.
Indications of this can be seen in the commonly seen EDID-hexdump full of zeros in the log, or the occasional/rare KASAN fault where the panel's attempt to read the EDID information causes a use after free on DP resources.
Read full descriptionShow less
It's tempting to move the devres to the DP controller's struct device, but the resources used by the device(s) on the aux bus are explicitly torn down in the error path. The KASAN-reported use-after-free also remains, as the DP aux "module" explicitly frees its devres-allocated memory in this code path.
As such, explicitly depopulate the aux bus in the error path, and in the component unbind path, to avoid these issues.
Patchwork: https://patchwork.freedesktop.org/patch/542163/
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Base score: 8.4
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.19%
- Percentile among all scored CVEs: 8
- Score date: 10/6/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
🎯 ATT&CK techniques
How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.
- Exploitation
T1068Exploitation for Privilege Escalationprivilege escalation45 % - Primary impact
T1499.004Application or System Exploitationimpact35 % - Secondary impact
T1005Data from Local Systemcollection30 %
Vulnerabilidad local sin interacción (AV:L/PR:N/UI:N) en kernel Linux que causa use-after-free. Permite escalada de privilegios (C:H/I:H) y denegación de servicio (KASAN fault). Impactos: DoS por crash y lectura de datos (EDID) de panel.
Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.
🛡️ ATT&CK mitigations that cover these techniques
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
References
Raw JSON (NVD)
Show
{
"id": "CVE-2023-53851",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 8.4,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 2.5
}
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{
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{
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"lessThan": "6.1",
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],
"programFiles": [
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],
"defaultStatus": "unaffected"
},
{
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{
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{
"status": "unaffected",
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{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.3.13",
"versionType": "semver",
"lessThanOrEqual": "6.3.*"
},
{
"status": "unaffected",
"version": "6.4.4",
"versionType": "semver",
"lessThanOrEqual": "6.4.*"
},
{
"status": "unaffected",
"version": "6.5",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/msm/dp/dp_display.c"
],
"defaultStatus": "affected"
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}
],
"published": "2025-12-09T16:17:25.670",
"references": [
{
"url": "https://git.kernel.org/stable/c/2fde37445807e6e6d7981402d0bf1be0e5d81291",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
"url": "https://git.kernel.org/stable/c/a7bfb2ad2184a1fba78be35209b6019aa8cc8d4d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/dp: Drop aux devices together with DP controller\n\nUsing devres to depopulate the aux bus made sure that upon a probe\ndeferral the EDP panel device would be destroyed and recreated upon next\nattempt.\n\nBut the struct device which the devres is tied to is the DPUs\n(drm_dev->dev), which may be happen after the DP controller is torn\ndown.\n\nIndications of this can be seen in the commonly seen EDID-hexdump full\nof zeros in the log, or the occasional/rare KASAN fault where the\npanel's attempt to read the EDID information causes a use after free on\nDP resources.\n\nIt's tempting to move the devres to the DP controller's struct device,\nbut the resources used by the device(s) on the aux bus are explicitly\ntorn down in the error path. The KASAN-reported use-after-free also\nremains, as the DP aux \"module\" explicitly frees its devres-allocated\nmemory in this code path.\n\nAs such, explicitly depopulate the aux bus in the error path, and in the\ncomponent unbind path, to avoid these issues.\n\nPatchwork: https://patchwork.freedesktop.org/patch/542163/"
}
],
"lastModified": "2026-10-03T11:17:28.960",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}