Answer in brief
CVE-2026-43380 records a High severity (CVSS 7.8) vulnerability in hwmon: (pmbus/q54sj108a2) fix stack overflow in debugfs read. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=d014538aa38561cd24c5eb228223585f26c5ec71 <a0fc1b9c738fba231f190ab960c83202722efee5 || >=d014538aa38561cd24c5eb228223585f26c5ec71 <c59090c50f62a17129fc4c5407bc4071305a9e82 || >=d014538aa38561cd24c5eb228223585f26c5ec71 <52db5ef163c96f916d424e472fb17aadc35a9f7a || >=d014538aa38561cd24c5eb228223585f26c5ec71 <b48a0f8d4541a4f6651dc9a64430ce9fdf5c120b || >=d014538aa38561cd24c5eb228223585f26c5ec71 <73a7a345816946d276ad2c46c8bb771de67cfc46 || >=d014538aa38561cd24c5eb228223585f26c5ec71 <24a7b9daa103fa963b3fd37d8805b23e01621976 || >=d014538aa38561cd24c5eb228223585f26c5ec71 <25dd70a03b1f5f3aa71e1a5091ecd9cd2a13ee43 | a0fc1b9c738fba231f190ab960c83202722efee5, c59090c50f62a17129fc4c5407bc4071305a9e82, 52db5ef163c96f916d424e472fb17aadc35a9f7a, b48a0f8d4541a4f6651dc9a64430ce9fdf5c120b, 73a7a345816946d276ad2c46c8bb771de67cfc46, 24a7b9daa103fa963b3fd37d8805b23e01621976, 25dd70a03b1f5f3aa71e1a5091ecd9cd2a13ee43 |
| Linux/Linuxgeneric | 5.11 | Not reported |
Published upstream
May 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.