Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/adm1266) cap PDIO scan in get_multiple at ADM1266_PDIO_NR adm1266_gpio_get_multiple() iterates the PDIO portion of the caller-supplied mask using for_each_set_bit_from(gpio_nr, mask, ADM1266_GPIO_NR + ADM1266_PDIO_STATUS) { ... } where ADM1266_PDIO_STATUS is the PMBus command code (0xE9, i.e. 233), not the number of PDIO pins. The intended upper bound is ADM1266_GPIO_NR + ADM1266_PDIO_NR = 25. gpiolib hands in a mask sized for gc.ngpio (= 25 bits on this chip), so the iteration walks find_next_bit() up to 242, reading up to 217 extra bits (a handful of unsigned-long words: four on 64-bit, seven on 32-bit) of whatever lives past the end of the mask in the caller's stack. Any incidental set bit in that range then drives a set_bit(gpio_nr, bits) call that writes past the end of the caller-supplied bits array too -- both out-of-bounds. Substitute ADM1266_PDIO_NR for the constant so the scan stops at the last real PDIO bit.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d98dfad35c38c037b37c4adc99df01da571031a5 before d0593e15fdeb56048a72c5c6e720f702759d0ccd; affected d98dfad35c38c037b37c4adc99df01da571031a5 before 17cee2f59029039416e8f6303050038eb59ba149; affected d98dfad35c38c037b37c4adc99df01da571031a5 before 299efd14c2eda7e5fd40025e54addd4151a01081; affected d98dfad35c38c037b37c4adc99df01da571031a5 before 4d1da9a6be5a8156c532d571c2ed237169f99244; affected d98dfad35c38c037b37c4adc99df01da571031a5 before b96c7f0bc0713dc6403912f6527d4ff9168d6fe6; affected d98dfad35c38c037b37c4adc99df01da571031a5 before fa7ca363069a70b0d1aa51e8892e3095fe2ac1ec; affected d98dfad35c38c037b37c4adc99df01da571031a5 before 2aef8f08c479f4cbc83e1e6b19d1c94d4dd24f17; affected d98dfad35c38c037b37c4adc99df01da571031a5 before d7834d92251baade796812876e95555e2066fa9f |
| Linux / Linux | affected 5.10; unaffected 0 before 5.10; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.142 through 6.6.*; unaffected 6.12.92 through 6.12.*; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/d0593e15fdeb56048a72c5c6e720f702759d0ccd
- https://git.kernel.org/stable/c/17cee2f59029039416e8f6303050038eb59ba149
- https://git.kernel.org/stable/c/299efd14c2eda7e5fd40025e54addd4151a01081
- https://git.kernel.org/stable/c/4d1da9a6be5a8156c532d571c2ed237169f99244
- https://git.kernel.org/stable/c/b96c7f0bc0713dc6403912f6527d4ff9168d6fe6
- https://git.kernel.org/stable/c/fa7ca363069a70b0d1aa51e8892e3095fe2ac1ec
- https://git.kernel.org/stable/c/2aef8f08c479f4cbc83e1e6b19d1c94d4dd24f17
- https://git.kernel.org/stable/c/d7834d92251baade796812876e95555e2066fa9f