fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
In the Linux kernel, the following vulnerability has been resolved: fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info Hold state of deferred I/O in struct fb_deferred_io_state. Allocate an instance as part of initializing deferred I/O and remove it only after the final mapping has been closed. If the fb_info and the contained deferred I/O meanwhile goes away, clear struct fb_deferred_io_state.info to invalidate the mapping. Any access will then result in a SIGBUS signal. Fixes a long-standing problem, where a device hot-unplug happens while user space still has an active mapping of the graphics memory. The hot- unplug frees the instance of struct fb_info. Accessing the memory will operate on undefined state.
CVE-2026-46065
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-46065
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "60b59beafba875aef6d378078bce0baf2287ae14",
"lessThan": "4aab89603b637a2e441b38808c4f6fe7d1184df6",
"versionType": "git"
},
{
"status": "affected",
"version": "60b59beafba875aef6d378078bce0baf2287ae14",
"lessThan": "4fda0d6b45faad44926dd3e4f55f118d899b2e27",
"versionType": "git"
},
{
"status": "affected",
"version": "60b59beafba875aef6d378078bce0baf2287ae14",
"lessThan": "2a40f8bc9bb713329f1c35ffc199ee961a7135b0",
"versionType": "git"
},
{
"status": "affected",
"version": "60b59beafba875aef6d378078bce0baf2287ae14",
"lessThan": "2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066",
"versionType": "git"
},
{
"status": "affected",
"version": "60b59beafba875aef6d378078bce0baf2287ae14",
"lessThan": "25c2b77bc463f29ee71a54b883548baf9386a0db",
"versionType": "git"
},
{
"status": "affected",
"version": "60b59beafba875aef6d378078bce0baf2287ae14",
"lessThan": "a0aafb421dd15e935d81543152617f2742cefa70",
"versionType": "git"
},
{
"status": "affected",
"version": "60b59beafba875aef6d378078bce0baf2287ae14",
"lessThan": "9ded47ad003f09a94b6a710b5c47f4aa5ceb7429",
"versionType": "git"
}
],
"programFiles": [
"drivers/video/fbdev/core/fb_defio.c",
"include/linux/fb.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.22"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.22",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.210",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.140",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.88",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.30",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.4",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/video/fbdev/core/fb_defio.c",
"include/linux/fb.h"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46065
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40112 · Revision 1
- Added to Heist Feed
- Publisher date