Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/adm1266) reject implausible blackbox record_count adm1266_nvmem_read_blackbox() loops over a record_count that comes straight from byte 3 of the BLACKBOX_INFO response. The destination buffer is data->dev_mem, sized for the nvmem cell's declared 2048 bytes (ADM1266_BLACKBOX_MAX_RECORDS * ADM1266_BLACKBOX_SIZE = 32 * 64). A device that reports a record_count greater than 32 -- whether due to firmware bugs, bus corruption, or a non-responsive slave returning 0xff -- would walk read_buff past the end of the dev_mem allocation on the trailing iterations. Cap record_count at ADM1266_BLACKBOX_MAX_RECORDS (introduced here) before entering the loop and return -EIO on any larger value, so a malformed BLACKBOX_INFO response cannot drive the loop out of bounds.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 before adcb163ad7cacca317872fc62bd8885e842e45e3; affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 before c2c56092710fe8a893b67b5a3d7e62808d02d84d; affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 before 5469e1e7c411acc15fdd8262c99c3ebd9defd594; affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 before f85c81e93dbd6915970bd5f3bffcf62633c4c54c; affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 before 0e791cd0140fb136083565aadfbe0f705aa260d0; affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 before 75c862adf3d3caab4f49bb3530723c215376e37c; affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 before 231db52a5b64d0a9769e298dadc148e1f79b26a6; affected 15609d1893020436e1e8ccfd9ded774a96dd17a2 before 4afca954622d672ea65ed961bed01cf91caa034e |
| 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/adcb163ad7cacca317872fc62bd8885e842e45e3
- https://git.kernel.org/stable/c/c2c56092710fe8a893b67b5a3d7e62808d02d84d
- https://git.kernel.org/stable/c/5469e1e7c411acc15fdd8262c99c3ebd9defd594
- https://git.kernel.org/stable/c/f85c81e93dbd6915970bd5f3bffcf62633c4c54c
- https://git.kernel.org/stable/c/0e791cd0140fb136083565aadfbe0f705aa260d0
- https://git.kernel.org/stable/c/75c862adf3d3caab4f49bb3530723c215376e37c
- https://git.kernel.org/stable/c/231db52a5b64d0a9769e298dadc148e1f79b26a6
- https://git.kernel.org/stable/c/4afca954622d672ea65ed961bed01cf91caa034e