gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock
In the Linux kernel, the following vulnerability has been resolved: gpio: pca953x: fix pca953x_irq_bus_sync_unlock regmap lock Locking is disabled in the regmap config as this driver uses its own lock. This means that all calls to regmap functions (read or write) must hold the i2c_lock. The function pca953x_irq_bus_sync_unlock() did not do this, and it was therefore possible that multiple threads could cause an incorrect register to be read/written. A previous patch partly fixed this, but only protected the write to the interrupt mask register, and not the read from the direction register.
CVE-2026-74733
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-2026-74733
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": "e2ecdddca80dd845df42376e4b0197fe97018ba2",
"lessThan": "5d05c4252c09ce10624be2197853c80bf87424e4",
"versionType": "git"
},
{
"status": "affected",
"version": "bfc6444b57dc7186b6acc964705d7516cbaf3904",
"lessThan": "41255e64eb9dd87b0b8675f4e47a9c67bcef6e39",
"versionType": "git"
},
{
"status": "affected",
"version": "bfc6444b57dc7186b6acc964705d7516cbaf3904",
"lessThan": "bf3f37c2d40b51deb79aea910f28999d7c8c6b5a",
"versionType": "git"
},
{
"status": "affected",
"version": "bfc6444b57dc7186b6acc964705d7516cbaf3904",
"lessThan": "e6a2f5f845f50b0c4299bace5111f56d3390a090",
"versionType": "git"
},
{
"status": "affected",
"version": "bfc6444b57dc7186b6acc964705d7516cbaf3904",
"lessThan": "9dc325327babe7f159e84cbe9380a45342da0585",
"versionType": "git"
},
{
"status": "affected",
"version": "58a5c93bd1a6e949267400080f07e57ffe05ec34",
"versionType": "git"
},
{
"status": "affected",
"version": "de7cffa53149c7b48bd1bb29b02390c9f05b7f41",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.42",
"lessThan": "6.6.160",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.101",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.9.11",
"lessThan": "6.10",
"versionType": "semver"
}
],
"programFiles": [
"drivers/gpio/gpio-pca953x.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpio/gpio-pca953x.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74733
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46595 · Revision 1
- Added to Heist Feed
- Publisher date