CVE-2026-23227 (GCVE-0-2026-23227)
Vulnerability from cvelistv5 – Published: 2026-02-18 14:53 – Updated: 2026-02-18 14:53
VLAI?
Title
drm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free
Summary
In the Linux kernel, the following vulnerability has been resolved:
drm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free
Exynos Virtual Display driver performs memory alloc/free operations
without lock protection, which easily causes concurrency problem.
For example, use-after-free can occur in race scenario like this:
```
CPU0 CPU1 CPU2
---- ---- ----
vidi_connection_ioctl()
if (vidi->connection) // true
drm_edid = drm_edid_alloc(); // alloc drm_edid
...
ctx->raw_edid = drm_edid;
...
drm_mode_getconnector()
drm_helper_probe_single_connector_modes()
vidi_get_modes()
if (ctx->raw_edid) // true
drm_edid_dup(ctx->raw_edid);
if (!drm_edid) // false
...
vidi_connection_ioctl()
if (vidi->connection) // false
drm_edid_free(ctx->raw_edid); // free drm_edid
...
drm_edid_alloc(drm_edid->edid)
kmemdup(edid); // UAF!!
...
```
To prevent these vulns, at least in vidi_context, member variables related
to memory alloc/free should be protected with ctx->lock.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
{
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"vendor": "Linux",
"versions": [
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"version": "6.18.11",
"versionType": "semver"
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{
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"version": "6.19.1",
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"descriptions": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/exynos: vidi: use ctx-\u003elock to protect struct vidi_context member variables related to memory alloc/free\n\nExynos Virtual Display driver performs memory alloc/free operations\nwithout lock protection, which easily causes concurrency problem.\n\nFor example, use-after-free can occur in race scenario like this:\n```\n\tCPU0\t\t\t\tCPU1\t\t\t\tCPU2\n\t----\t\t\t\t----\t\t\t\t----\n vidi_connection_ioctl()\n if (vidi-\u003econnection) // true\n drm_edid = drm_edid_alloc(); // alloc drm_edid\n ...\n ctx-\u003eraw_edid = drm_edid;\n ...\n\t\t\t\t\t\t\t\tdrm_mode_getconnector()\n\t\t\t\t\t\t\t\t drm_helper_probe_single_connector_modes()\n\t\t\t\t\t\t\t\t vidi_get_modes()\n\t\t\t\t\t\t\t\t if (ctx-\u003eraw_edid) // true\n\t\t\t\t\t\t\t\t drm_edid_dup(ctx-\u003eraw_edid);\n\t\t\t\t\t\t\t\t if (!drm_edid) // false\n\t\t\t\t\t\t\t\t ...\n\t\t\t\tvidi_connection_ioctl()\n\t\t\t\t if (vidi-\u003econnection) // false\n\t\t\t\t drm_edid_free(ctx-\u003eraw_edid); // free drm_edid\n\t\t\t\t ...\n\t\t\t\t\t\t\t\t drm_edid_alloc(drm_edid-\u003eedid)\n\t\t\t\t\t\t\t\t kmemdup(edid); // UAF!!\n\t\t\t\t\t\t\t\t ...\n```\n\nTo prevent these vulns, at least in vidi_context, member variables related\nto memory alloc/free should be protected with ctx-\u003elock."
}
],
"providerMetadata": {
"dateUpdated": "2026-02-18T14:53:30.784Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
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"url": "https://git.kernel.org/stable/c/60b75407c172e1f341a8a5097c5cbc97dbbdd893"
},
{
"url": "https://git.kernel.org/stable/c/0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385"
}
],
"title": "drm/exynos: vidi: use ctx-\u003elock to protect struct vidi_context member variables related to memory alloc/free",
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"cveId": "CVE-2026-23227",
"datePublished": "2026-02-18T14:53:30.784Z",
"dateReserved": "2026-01-13T15:37:45.987Z",
"dateUpdated": "2026-02-18T14:53:30.784Z",
"state": "PUBLISHED"
},
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"nvd": "{\"cve\":{\"id\":\"CVE-2026-23227\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-18T16:22:32.467\",\"lastModified\":\"2026-02-18T17:51:53.510\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/exynos: vidi: use ctx-\u003elock to protect struct vidi_context member variables related to memory alloc/free\\n\\nExynos Virtual Display driver performs memory alloc/free operations\\nwithout lock protection, which easily causes concurrency problem.\\n\\nFor example, use-after-free can occur in race scenario like this:\\n```\\n\\tCPU0\\t\\t\\t\\tCPU1\\t\\t\\t\\tCPU2\\n\\t----\\t\\t\\t\\t----\\t\\t\\t\\t----\\n vidi_connection_ioctl()\\n if (vidi-\u003econnection) // true\\n drm_edid = drm_edid_alloc(); // alloc drm_edid\\n ...\\n ctx-\u003eraw_edid = drm_edid;\\n ...\\n\\t\\t\\t\\t\\t\\t\\t\\tdrm_mode_getconnector()\\n\\t\\t\\t\\t\\t\\t\\t\\t drm_helper_probe_single_connector_modes()\\n\\t\\t\\t\\t\\t\\t\\t\\t vidi_get_modes()\\n\\t\\t\\t\\t\\t\\t\\t\\t if (ctx-\u003eraw_edid) // true\\n\\t\\t\\t\\t\\t\\t\\t\\t drm_edid_dup(ctx-\u003eraw_edid);\\n\\t\\t\\t\\t\\t\\t\\t\\t if (!drm_edid) // false\\n\\t\\t\\t\\t\\t\\t\\t\\t ...\\n\\t\\t\\t\\tvidi_connection_ioctl()\\n\\t\\t\\t\\t if (vidi-\u003econnection) // false\\n\\t\\t\\t\\t drm_edid_free(ctx-\u003eraw_edid); // free drm_edid\\n\\t\\t\\t\\t ...\\n\\t\\t\\t\\t\\t\\t\\t\\t drm_edid_alloc(drm_edid-\u003eedid)\\n\\t\\t\\t\\t\\t\\t\\t\\t kmemdup(edid); // UAF!!\\n\\t\\t\\t\\t\\t\\t\\t\\t ...\\n```\\n\\nTo prevent these vulns, at least in vidi_context, member variables related\\nto memory alloc/free should be protected with ctx-\u003elock.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/60b75407c172e1f341a8a5097c5cbc97dbbdd893\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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