Answer in brief
CVE-2026-52948 records a Unknown severity vulnerability in i2c: dev: prevent integer overflow in I2C_TIMEOUT ioctl. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d <e9ffd5f5050fbb199d270a85614cd27ebed6fbac || >=cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d <0b88ecfbc9dc33b4db8836c37b50cf174e6c0691 || >=cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d <943e318eedbeaeea08ece3f5dd44c982f4ed2ef5 || >=cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d <aa6ef734016912653a909477fb30aeb66c98b3a2 || >=cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d <ff02add34ffd03449b8115904ebe2ec4fed022d4 || >=cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d <ffbcf31f032eb454ebfd29309f51366fe57f4ac4 || >=cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d <4576621dc6577f21a032acfd16c3ad61907a5ea7 || >=cd97f39b7cdf1c8a9c9f52865eec795b7f0c811d <617eb7c0961a8dfcfc811844a6396e406b2923ea | e9ffd5f5050fbb199d270a85614cd27ebed6fbac, 0b88ecfbc9dc33b4db8836c37b50cf174e6c0691, 943e318eedbeaeea08ece3f5dd44c982f4ed2ef5, aa6ef734016912653a909477fb30aeb66c98b3a2, ff02add34ffd03449b8115904ebe2ec4fed022d4, ffbcf31f032eb454ebfd29309f51366fe57f4ac4, 4576621dc6577f21a032acfd16c3ad61907a5ea7, 617eb7c0961a8dfcfc811844a6396e406b2923ea |
| Linux/Linuxgeneric | 2.6.29 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
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]
Quoted source text, attributed separately from HOL analysis.