CVE-2026-64083
CVE CVE-2026-64083EUVD EUVD-2026-45656Published 2026-07-19T15:39:54.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/adm1266) reject short block-read responses in the GPIO accessors adm1266_gpio_get() and adm1266_gpio_get_multiple() both compose the pin-status word as pins_status = read_buf[0] + (read_buf[1] << 8); right after i2c_smbus_read_block_data(), guarding only against an error return. A well-behaved device returns 2 bytes for GPIO_STATUS/PDIO_STATUS, but the helper happily reports a 0- or 1-byte response too. If the device returns 0 bytes, both read_buf slots are uninitialized stack memory; if it returns 1 byte, read_buf[1] is. The composed value then flows through set_bit() into the caller's *bits in adm1266_gpio_get_multiple(), or into the return value of adm1266_gpio_get(), and ends up in userspace via gpiolib (sysfs and the char-dev ioctls). That leaks a few bits of kernel stack per request on any device whose firmware glitch, bus error, or hostile slave produces a short block-read response. Add the missing length check to both call sites and surface a short response as -EIO.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 7.0.11; patch: 6.6.142; patch: 0; d98dfad35c38c037b37c4adc99df01da571031a5 <fd9196aad9e5a3845cea17de3405ebc700382142; d98dfad35c38c037b37c4adc99df01da571031a5 <64fa9328948ddcc0f7f3c23ea1756c126d9dffac; patch: 6.1.175; d98dfad35c38c037b37c4adc99df01da571031a5 <a7232f68c43ca62f545049b7f5fbfc75137b843b; d98dfad35c38c037b37c4adc99df01da571031a5 <a2d1c819348b36fccbbfcf37c5fa7a50a9b4528f; d98dfad35c38c037b37c4adc99df01da571031a5 <c603b6c6840ac0c6285f5eefea0de6242710af21; patch: 5.15.209; patch: 7.1; d98dfad35c38c037b37c4adc99df01da571031a5 <ee4799becf7d2af3778007e22c2e55c4009a49c7; patch: 5.10.258; patch: 6.12.92; d98dfad35c38c037b37c4adc99df01da571031a5 <ae25cf2ea9ebd06d7ad416647dbdc7b5d0172946; 5.10; patch: 6.18.34; d98dfad35c38c037b37c4adc99df01da571031a5 <eb3cd9bb590460c6127145cb245be925d23f5232
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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