i2c: core: fix adapter registration race
In the Linux kernel, the following vulnerability has been resolved: i2c: core: fix adapter registration race Adapters can be looked up based on their id using i2c_get_adapter() which takes a reference to the embedded struct device. Make sure that the adapter (including its struct device) has been initialised before adding it to the IDR to avoid accessing uninitialised data which could, for example, lead to NULL-pointer dereferences or use-after-free. Note that the i2c-dev chardev, which is registered from a bus notifier, currently uses i2c_get_adapter() so the adapter needs to be added to the IDR before registration.
CVE-2026-53400
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-2026-53400
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": "6e13e641841833cc2aa5baefe89bb04bc388801b",
"lessThan": "2e57c788e71f1763445f812eba4e0b4a2fbd0646",
"versionType": "git"
},
{
"status": "affected",
"version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
"lessThan": "a4365bc41baaf67f3a5aa8556d23544e6ec7480a",
"versionType": "git"
},
{
"status": "affected",
"version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
"lessThan": "1febb174815bcae56d73587e99e8f87e02f0784d",
"versionType": "git"
},
{
"status": "affected",
"version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
"lessThan": "da9d8d9711f78deebc202d0cffcf577e45ee8621",
"versionType": "git"
},
{
"status": "affected",
"version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
"lessThan": "78793c75dc6d0ff2e4d50ad617349b328a99054e",
"versionType": "git"
},
{
"status": "affected",
"version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
"lessThan": "6a946038f2a5a8c29048c6af369d4e391448a5c5",
"versionType": "git"
},
{
"status": "affected",
"version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
"lessThan": "a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0",
"versionType": "git"
},
{
"status": "affected",
"version": "6e13e641841833cc2aa5baefe89bb04bc388801b",
"lessThan": "ba14d7cf2fe7284610a29854bdff22b2537d3ce6",
"versionType": "git"
}
],
"programFiles": [
"drivers/i2c/i2c-core-base.c"
],
"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": "5.10.261",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.95",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.38",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.3",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/i2c/i2c-core-base.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53400
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40826 · Revision 1
- Added to Heist Feed
- Publisher date