i2c: imx: Fix slave registration race and error handling
In the Linux kernel, the following vulnerability has been resolved: i2c: imx: Fix slave registration race and error handling In i2c_imx_reg_slave(), the slave pointer was assigned before pm_runtime_resume_and_get(). If pm_runtime_resume_and_get() failed, the error path returned without clearing i2c_imx->slave, leaving it non-NULL and causing all subsequent registration attempts to fail with -EBUSY. Additionally, because this driver uses a shared IRQ, the interrupt handler i2c_imx_isr() can execute concurrently and, after acquiring slave_lock, dereference i2c_imx->slave. The previous fix attempt added a lockless i2c_imx->slave = NULL on the error path, but that could race with the ISR under the lock and still cause a NULL pointer dereference. Fix both issues by deferring the assignment of i2c_imx->slave and i2c_imx->last_slave_event to after a successful resume, and by performing the assignment inside the slave_lock critical section. This guarantees that the slave pointer is never left stale on the error path and is always valid when observed by the interrupt handler.
CVE-2026-80678
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-2026-80678
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": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
"lessThan": "754bc62f72fd64b202462367134ac8ce95b005de",
"versionType": "git"
},
{
"status": "affected",
"version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
"lessThan": "cfdf6e13518589f911b7eace6ccb788e4ed87397",
"versionType": "git"
},
{
"status": "affected",
"version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
"lessThan": "b9f6f4883b9ac86654e75899d0dbf8a7a96ad5d8",
"versionType": "git"
},
{
"status": "affected",
"version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
"lessThan": "d6748f6802f3eebafaa16a5e5dcfbfb9b3bc173f",
"versionType": "git"
},
{
"status": "affected",
"version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
"lessThan": "12a4f0950a158d98552cbaeacc35edccd8d975fa",
"versionType": "git"
},
{
"status": "affected",
"version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
"lessThan": "614ca6594e301ff682999797c2216e9685558a2b",
"versionType": "git"
},
{
"status": "affected",
"version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1",
"lessThan": "d64ec362c369bbc33833f7936d5f3a706b0d5c45",
"versionType": "git"
}
],
"programFiles": [
"drivers/i2c/busses/i2c-imx.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.217",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/i2c/busses/i2c-imx.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80678
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34354 · Revision 1
- Added to Heist Feed
- Publisher date