linux — security advisory
In the Linux kernel, the following vulnerability has been resolved: drm/fb-helper: Fix out-of-bounds access Clip memory range to screen-buffer size to avoid out-of-bounds access in fbdev deferred I/O's damage handling. Fbdev's deferred I/O can only track pages. From the range of pages, the damage handler computes the clipping rectangle for the display update. If the fbdev screen buffer ends near the beginning of a page, that page could contain more scanlines. The damage handler would then track these non-existing scanlines as dirty and provoke an out-of-bounds access during the screen update. Hence, clip the maximum memory range to the size of the screen buffer. While at it, rename the variables min/max to min_off/max_off in drm_fb_helper_deferred_io(). This avoids confusion with the macros of the same name.
- Products
- linux
- Affected versions
- Not specified
- Fixed versions
- 6.0.2-1
- CVEs
- CVE-2022-50221
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 15:48 UTC · Revision 1
Source evidence
In the Linux kernel, the following vulnerability has been resolved: drm/fb-helper: Fix out-of-bounds access Clip memory range to screen-buffer size to avoid out-of-bounds access in fbdev deferred I/O's damage handling. Fbdev's deferred I/O can only track pages. From the range of pages, the damage handler computes the clipping rectangle for the display update. If the fbdev screen buffer ends near the beginning of a page, that page could contain more scanlines. The damage handler would then track these non-existing scanlines as dirty and provoke an out-of-bounds access during the screen update. Hence, clip the maximum memory range to the size of the screen buffer. While at it, rename the variables min/max to min_off/max_off in drm_fb_helper_deferred_io(). This avoids confusion with the macros of the same name.
osv:DEBIAN-CVE-2022-50221
linux
Fixed versions: 6.0.2-1
linux
Fixed versions: 6.0.2-1
linux
Fixed versions: 6.0.2-1
Complete source record
{
"id": "67d64246e2f3acbfb5e22798e522217a6b122e43c7d2cdf8e44ee8e0dac503f6",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2022-50221",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2022-50221",
"summary": "In the Linux kernel, the following vulnerability has been resolved: drm/fb-helper: Fix out-of-bounds access Clip memory range to screen-buffer size to avoid out-of-bounds access in fbdev deferred I/O's damage handling. Fbdev's deferred I/O can only track pages. From the range of pages, the damage handler computes the clipping rectangle for the display update. If the fbdev screen buffer ends near the beginning of a page, that page could contain more scanlines. The damage handler would then track these non-existing scanlines as dirty and provoke an out-of-bounds access during the screen update. Hence, clip the maximum memory range to the size of the screen buffer. While at it, rename the variables min/max to min_off/max_off in drm_fb_helper_deferred_io(). This avoids confusion with the macros of the same name.",
"evidence": "osv:DEBIAN-CVE-2022-50221",
"products": [
{
"name": {
"value": "linux",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
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"evidence": "/affected/0/ranges"
}
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"affected_versions": []
},
{
"name": {
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"severity": "high",
"structured": {
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"aliases": [
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"metrics": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"
}
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"affected": [
{
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"ecosystem": "Debian:12"
},
"database_specific": {
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},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
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"package": {
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"ecosystem": "Debian:13"
},
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50221.json"
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{
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"package": {
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"ecosystem": "Debian:14"
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"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50221.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T08:03:17.770579637Z",
"provider": "osv",
"upstream": [
"CVE-2022-50221"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2022-50221"
]
},
"related_cves": [
{
"value": "CVE-2022-50221",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 326144,
"published_at": "2025-06-18T11:15:53.09+00:00"
}