Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (pmbus/q54sj108a2) fix stack overflow in debugfs read The q54sj108a2_debugfs_read function suffers from a stack buffer overflow due to incorrect arguments passed to bin2hex(). The function currently passes 'data' as the destination and 'data_char' as the source. Because bin2hex() converts each input byte into two hex characters, a 32-byte block read results in 64 bytes of output. Since 'data' is only 34 bytes (I2C_SMBUS_BLOCK_MAX + 2), this writes 30 bytes past the end of the buffer onto the stack. Additionally, the arguments were swapped: it was reading from the zero-initialized 'data_char' and writing to 'data', resulting in all-zero output regardless of the actual I2C read. Fix this by: 1. Expanding 'data_char' to 66 bytes to safely hold the hex output. 2. Correcting the bin2hex() argument order and using the actual read count. 3. Using a pointer to select the correct output buffer for the final simple_read_from_buffer call.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
d014538aa38561cd24c5eb228223585f26c5ec71 to < a0fc1b9c738fba231f190ab960c83202722efee5affectedd014538aa38561cd24c5eb228223585f26c5ec71 to < c59090c50f62a17129fc4c5407bc4071305a9e82affectedd014538aa38561cd24c5eb228223585f26c5ec71 to < 52db5ef163c96f916d424e472fb17aadc35a9f7aaffectedd014538aa38561cd24c5eb228223585f26c5ec71 to < b48a0f8d4541a4f6651dc9a64430ce9fdf5c120baffectedd014538aa38561cd24c5eb228223585f26c5ec71 to < 73a7a345816946d276ad2c46c8bb771de67cfc46affectedd014538aa38561cd24c5eb228223585f26c5ec71 to < 24a7b9daa103fa963b3fd37d8805b23e01621976affectedd014538aa38561cd24c5eb228223585f26c5ec71 to < 25dd70a03b1f5f3aa71e1a5091ecd9cd2a13ee43affected
Linux Linux
Default version status: affected
5.11affected0 to < 5.11unaffected5.15.203 to ≤ 5.15.*unaffected6.1.167 to ≤ 6.1.*unaffected6.6.130 to ≤ 6.6.*unaffected6.12.78 to ≤ 6.12.*unaffected6.18.19 to ≤ 6.18.*unaffected6.19.9 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/a0fc1b9c738fba231f190ab960c83202722efee5 ↗
- https://git.kernel.org/stable/c/c59090c50f62a17129fc4c5407bc4071305a9e82 ↗
- https://git.kernel.org/stable/c/52db5ef163c96f916d424e472fb17aadc35a9f7a ↗
- https://git.kernel.org/stable/c/b48a0f8d4541a4f6651dc9a64430ce9fdf5c120b ↗
- https://git.kernel.org/stable/c/73a7a345816946d276ad2c46c8bb771de67cfc46 ↗
- https://git.kernel.org/stable/c/24a7b9daa103fa963b3fd37d8805b23e01621976 ↗
- https://git.kernel.org/stable/c/25dd70a03b1f5f3aa71e1a5091ecd9cd2a13ee43 ↗