i3c: master: Fix use-after-free of master->this
In the Linux kernel, the following vulnerability has been resolved: i3c: master: Fix use-after-free of master->this sysfs attribute callbacks for the master controller device dereference master->this. However, master->this is freed in i3c_master_detach_free_devs() before the master device itself is released. As a result, sysfs accesses can dereference a freed master->this pointer, leading to a use-after-free. Keep master->this alive until i3c_masterdev_release(), which is called after the master device and its sysfs state are being torn down. Do not free master->this as part of the normal device detach path. On the error path in i3c_master_set_info(), reset master->this and bus.cur_master to NULL before freeing the allocated device.
CVE-2026-93200
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-2026-93200
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": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
"lessThan": "027679d613ea73b8a00831369ec34eea804ce1bd",
"versionType": "git"
},
{
"status": "affected",
"version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
"lessThan": "23a1c4288a60e253a05a882bd8928ed61beb4a48",
"versionType": "git"
},
{
"status": "affected",
"version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
"lessThan": "4f3145db05fede36b35f8249b8acde5bd5d54864",
"versionType": "git"
},
{
"status": "affected",
"version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
"lessThan": "50034d8d0f797c3a7a599f750a7d3e792e80dea5",
"versionType": "git"
},
{
"status": "affected",
"version": "3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0",
"lessThan": "feb0ed76601f3c2f91f08688c5a7d8b9d382f720",
"versionType": "git"
}
],
"programFiles": [
"drivers/i3c/master.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/i3c/master.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-93200
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48732 · Revision 1
- Added to Heist Feed
- Publisher date