CVE-2026-0648: eclipse foundation eclipse threadx Incorrect Check of Function Return Value

Vulnerability summary

CVE-2026-0648 is a high (CVSS 7.8) Incorrect Check of Function Return Value vulnerability in eclipse foundation eclipse threadx. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.7% of scored vulnerabilities.

Timeline

1. 27-01-2026
   PublishedVulnerability first disclosed.
2. 27-01-2026
   Last modifiedVulnerability information updated.

Description

The vulnerability stems from an incorrect error-checking logic in the CreateCounter() function (in threadx/utility/rtos_compatibility_layers/OSEK/tx_osek.c) when handling the return value of osek_get_counter(). Specifically, the current code checks if cntr_id equals 0u to determine failure, but @osek_get_counter() actually returns E_OS_SYS_STACK (defined as 12U) when it fails. This mismatch causes the error branch to never execute even when the counter pool is exhausted. As a result, when the counter pool is depleted, the code proceeds to cast the error code (12U) to a pointer (OSEK_COUNTER *), creating a wild pointer. Subsequent writes to members of this pointer lead to writes to illegal memory addresses (e.g., 0x0000000C), which can trigger immediate HardFaults or silent memory corruption. This vulnerability poses significant risks, including potential denial-of-service attacks (via repeated calls to exhaust the counter pool) and unauthorized memory access.

• CWE-253Incorrect Check of Function Return ValueThe product incorrectly checks a return value from a function, which prevents it from detecting errors or exceptional conditions.
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.