CVE-2026-115653

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    CVE-2026-115653

    Published: 2 Nov 2026Last Modified: 4 Nov 2026

    Summary: Cortex-M module ports save a preempted user-mode module thread's registers through its unchecked stack pointer in privileged mode

    Details: In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the PendSV handler of the Cortex-M module ports saves a preempted user-mode module thread's registers in privileged mode at addresses taken from the thread's stack pointer, without checking that pointer against the thread's stack. A user-mode, memory-protected module can thereby write up to nine words, eight of its choosing, or 25 with floating-point state, into memory immediately below any region it may write, and read back what is stored there.

    References: https://gitlab.eclipse.org/security/cve-assignment/-/work_items/503, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115653.json, https://github.com/eclipse-threadx/threadx/security/advisories/GHSA-c38r-v552-gh5g, https://nvd.nist.gov/vuln/detail/CVE-2026-115653

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 6a018a4cfda937c0d8cbdee761187c5c5843e115
    Fixed -None

    Affected versions

    v6.5.2.202603b_rel
    v6.5.2.202603_rel
    v6.5.1.202602a_rel
    v6.5.1.202602_rel
    v6.5.0.202601_rel

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-115653 | CVE-DB