i2c: dev: prevent integer overflow in I2C_TIMEOUT ioctl
In the Linux kernel, the following vulnerability has been resolved: i2c: dev: prevent integer overflow in I2C_TIMEOUT ioctl While fuzzing with Syzkaller, a persistent `schedule_timeout: wrong timeout value` warning was observed, accompanied by SMBus controller state machine corruption. The I2C_TIMEOUT ioctl accepts a user-provided timeout in multiples of 10 ms. The user argument is checked against INT_MAX, but it is subsequently multiplied by 10 before being passed to msecs_to_jiffies(). A malicious user can pass a large value (e.g., 429496729) that passes the `arg > INT_MAX` check but overflows when multiplied by 10. This results in a truncated 32-bit unsigned value that bypasses the internal `(int)m < 0` check in `msecs_to_jiffies()`. The truncated value is then assigned to `client->adapter->timeout` (a signed 32-bit int), which is reinterpreted as a negative number. When passed to wait_for_completion_timeout(), this negative value undergoes sign extension to a 64-bit unsigned long, triggering the `schedule_timeout` warning and causing premature returns. This leaves the SMBus state machine in an unrecoverable state, constituting a local Denial of Service (DoS). Fix this by bounding the user argument to `INT_MAX / 10`. [wsa: move the comment as well]
CVE-2026-52948
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-2026-52948
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": "cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d",
"lessThan": "e9ffd5f5050fbb199d270a85614cd27ebed6fbac",
"versionType": "git"
},
{
"status": "affected",
"version": "cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d",
"lessThan": "0b88ecfbc9dc33b4db8836c37b50cf174e6c0691",
"versionType": "git"
},
{
"status": "affected",
"version": "cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d",
"lessThan": "943e318eedbeaeea08ece3f5dd44c982f4ed2ef5",
"versionType": "git"
},
{
"status": "affected",
"version": "cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d",
"lessThan": "aa6ef734016912653a909477fb30aeb66c98b3a2",
"versionType": "git"
},
{
"status": "affected",
"version": "cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d",
"lessThan": "ff02add34ffd03449b8115904ebe2ec4fed022d4",
"versionType": "git"
},
{
"status": "affected",
"version": "cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d",
"lessThan": "ffbcf31f032eb454ebfd29309f51366fe57f4ac4",
"versionType": "git"
},
{
"status": "affected",
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"lessThan": "4576621dc6577f21a032acfd16c3ad61907a5ea7",
"versionType": "git"
},
{
"status": "affected",
"version": "cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d",
"lessThan": "617eb7c0961a8dfcfc811844a6396e406b2923ea",
"versionType": "git"
}
],
"programFiles": [
"drivers/i2c/i2c-dev.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.29"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.29",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"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": "6.6.143",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.94",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.36",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.13",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/i2c/i2c-dev.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-52948
Source reference:
/cveMetadata/cveId
Publisher severity
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- Event
- #28422 · Revision 1
- Added to Heist Feed
- Publisher date