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CVE-2026-72142: Linux

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: i2c: imx: fix locked bus on SMBus block-read of 0 (atomic) SMBus 3.1 6.5.7 allows a Block Read byte count of 0, but the atomic (polling) path 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 for this i2c controller. Reading I2DR to obtain the count likewise arms the next byte on the count > I2C_SMBUS_BLOCK_MAX path, which also returned -EPROTO directly and left the bus held. Handle both: NACK the in-flight dummy byte (TXAK) and extend msgs->len so the existing last-byte handling emits STOP; the dummy byte is discarded. A count of 0 is a valid empty block read; a count above I2C_SMBUS_BLOCK_MAX is still reported as -EPROTO, but only after the bus has been released. The interrupt-driven path has the same flaw from a later commit and is fixed separately, as it carries a different Fixes: tag and stable range.

    Засегнати продукти

    • Linux Linux: 8e8782c71595a5ad29e234ce6b3d2fce787fb07a преди 0f29df3c3d607a9dbc14aed0e45504ced4d2e7ec; 8e8782c71595a5ad29e234ce6b3d2fce787fb07a преди 38d4947431b2410850409fda016b2ac9f640a4dd; 8e8782c71595a5ad29e234ce6b3d2fce787fb07a преди e3e8b02d4773cfc5ad561d2e5505efde36c6927a; 8e8782c71595a5ad29e234ce6b3d2fce787fb07a преди 016ef0f6ca4bc9bf0330ac41bd2ea349759643e3; 8e8782c71595a5ad29e234ce6b3d2fce787fb07a преди c882e8cc68fb993700dc21fd6e754001e6297934; 8e8782c71595a5ad29e234ce6b3d2fce787fb07a преди 6d2c973926d0612360693bc559be2ffde836151b; 8e8782c71595a5ad29e234ce6b3d2fce787fb07a преди 60ed00d46616a9232e42ea7a3e3c0273d7cf7543; 8e8782c71595a5ad29e234ce6b3d2fce787fb07a преди cb2fc37857693b55909fb77dc2c87cfbc1cdc476
    • Linux Linux: 3.16; преди 3.16; 5.10.266 до 5.10.*; 5.15.217 до 5.15.*; 6.1.184 до 6.1.*; 6.6.148 до 6.6.*; 6.12.101 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

    История

    • 15 август 2026 Публикувано

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    Първоизточници

    CVE-2026-72142: Linux | freedomonline.bg