PT-2026-61452 · Linux · Linux

CVE-2026-64135

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Publicado

2026-07-19

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Atualizado

2026-07-19

Nenhuma

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In the Linux kernel, the following vulnerability has been resolved:
hwmon: (pmbus/adm1266) widen blackbox-info buffer to I2C SMBUS BLOCK MAX
adm1266 nvmem read blackbox() declares a 5-byte stack buffer and passes it to i2c smbus read block data() to retrieve the 4-byte BLACKBOX INFO response. i2c smbus read block data() does not honour caller buffer sizes -- it memcpy()s data.block[0] bytes from the SMBus transaction (where data.block[0] is the length byte returned by the slave device, up to I2C SMBUS BLOCK MAX = 32):
memcpy(values, &data.block[1], data.block[0]);
If the device returns any block length above 5, the call overflows the caller's 5-byte stack buffer before the post-call
if (ret != 4)
	return -EIO;
check has a chance to reject the response.
Widen the local buffer to I2C SMBUS BLOCK MAX so the helper has room for any well-formed SMBus block response, matching the convention used by the other i2c smbus read block data() callers in this driver.
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Identificadores relacionados

CVE-2026-64135

Produtos afetados

Linux