CVE-2026-43380

HIGH EPSS 4.0%
Published May 8, 20261mo ago · Modified Jun 17, 20261w ago
7.1 CVSS 3.1
High
Find Similar
Published May 8, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.1
Exploitability
1.8
Impact
5.2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥5.11  –  <5.15.203
linuxlinux_kernel*≥5.16  –  <6.1.167
linuxlinux_kernel*≥6.2  –  <6.6.130
linuxlinux_kernel*≥6.7  –  <6.12.78
linuxlinux_kernel*≥6.13  –  <6.18.19
linuxlinux_kernel*≥6.19  –  <6.19.9
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/24a7b9daa103fa963b3fd37d8805b23e01621976
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/25dd70a03b1f5f3aa71e1a5091ecd9cd2a13ee43
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/52db5ef163c96f916d424e472fb17aadc35a9f7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/73a7a345816946d276ad2c46c8bb771de67cfc46
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a0fc1b9c738fba231f190ab960c83202722efee5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b48a0f8d4541a4f6651dc9a64430ce9fdf5c120b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c59090c50f62a17129fc4c5407bc4071305a9e82
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/24a7b9daa103fa963b3fd37d8805b23e01621976
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/25dd70a03b1f5f3aa71e1a5091ecd9cd2a13ee43
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/52db5ef163c96f916d424e472fb17aadc35a9f7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/73a7a345816946d276ad2c46c8bb771de67cfc46
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a0fc1b9c738fba231f190ab960c83202722efee5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b48a0f8d4541a4f6651dc9a64430ce9fdf5c120b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c59090c50f62a17129fc4c5407bc4071305a9e82
    Patch