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.
References
Configurations
Configuration 1 (hide)
|
History
20 May 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
19 May 2026, 19:55
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/24a7b9daa103fa963b3fd37d8805b23e01621976 - Patch | |
| References | () https://git.kernel.org/stable/c/25dd70a03b1f5f3aa71e1a5091ecd9cd2a13ee43 - Patch | |
| References | () https://git.kernel.org/stable/c/52db5ef163c96f916d424e472fb17aadc35a9f7a - Patch | |
| References | () https://git.kernel.org/stable/c/73a7a345816946d276ad2c46c8bb771de67cfc46 - Patch | |
| References | () https://git.kernel.org/stable/c/a0fc1b9c738fba231f190ab960c83202722efee5 - Patch | |
| References | () https://git.kernel.org/stable/c/b48a0f8d4541a4f6651dc9a64430ce9fdf5c120b - Patch | |
| References | () https://git.kernel.org/stable/c/c59090c50f62a17129fc4c5407bc4071305a9e82 - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-125 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.1 |
08 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-08 15:16
Updated : 2026-05-20 17:16
NVD link : CVE-2026-43380
Mitre link : CVE-2026-43380
CVE.ORG link : CVE-2026-43380
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-125
Out-of-bounds Read