Answer in brief
CVE-2026-72141 records a High severity (CVSS 7.5) vulnerability in i2c: imx: fix locked bus on SMBus block-read of 0 (IRQ). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5f5c2d4579ca6836f5604cca979debd68ecfe23f <5d3240f42a667e29262aff76fdebfcdac4980626 || >=5f5c2d4579ca6836f5604cca979debd68ecfe23f <56ddfc18ea8f7d77747658892873eb632b2ed530 || >=5f5c2d4579ca6836f5604cca979debd68ecfe23f <07fd9385f0d87dff4b34f355f68adf701080cb24 | 5d3240f42a667e29262aff76fdebfcdac4980626, 56ddfc18ea8f7d77747658892873eb632b2ed530, 07fd9385f0d87dff4b34f355f68adf701080cb24 |
| Linux/Linuxgeneric | 6.13 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: i2c: imx: fix locked bus on SMBus block-read of 0 (IRQ) SMBus 3.1 6.5.7 allows a Block Read byte count of 0, but the interrupt-driven block-read state machine rejects it as -EPROTO. Worse, it returns without a NACK+STOP: the next receive cycle has already started, so the target keeps holding SDA and the bus stays stuck until a power cycle of this i2c controller. Accept count=0: NACK the in-flight dummy byte (TXAK) and set msg->len to 2 so i2c_imx_isr_read_continue() emits STOP via its normal last-byte path. The dummy byte is discarded; block-read callers only consume buf[0..count-1]. Reading I2DR has likewise already armed the next byte on the count > I2C_SMBUS_BLOCK_MAX error path, so NACK it (TXAK) before aborting with -EPROTO; otherwise the failing transfer's STOP cannot complete and the bus stays held. The atomic path regressed earlier (v3.16) and is fixed separately; this patch covers only the v6.13 state-machine rework.
Quoted source text, attributed separately from HOL analysis.