{"apiVersion":"1.0","identifier":"CVE-2026-72141","description":"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.","publishedAt":"2026-08-15T06:21:31","lastModifiedAt":"2026-08-17T06:18:14","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72141","cvssScore":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","epssProbability":0.00576,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72141","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72141","en":"https://www.redsauce.net/en/cves/CVE-2026-72141","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72141","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72141","de":"https://www.redsauce.net/de/cves/CVE-2026-72141","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72141","el":"https://www.redsauce.net/el/cves/CVE-2026-72141"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72141"}}