CVE-2026-115653: In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the PendSV handler of the Cortex-M module ports saves

Routine

HIGH 7UPGRADE

CVE-2026-115653 is a high-severity flaw (CVSS 7) affecting eclipse threadx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7 (High)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-787, CWE-822
Published	2026-11-02
Last modified	2026-11-02

Publisher (CNA): eclipse · Vendor: eclipse foundation · Source: CVE Program record (NVD analysis pending)

Last updated 2026-11-02 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-11-02 15:10 UTCPublished CVE record published
2026-11-02 15:10 UTCUpdated Record last modified

eclipse foundation eclipse threadx UPGRADE

Affected: >= 6.0.1 and <= 6.5.2.202603

Fixed in: newer than 6.5.2.202603

Safe to downgrade to: a release before 6.0.1

1. Check installed version

apt-cache policy eclipse-threadx || rpm -q eclipse-threadx || eclipse-threadx --version

2. UPGRADE to newer than 6.5.2.202603 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade eclipse-threadx

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade eclipse-threadx

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.0.1 (Debian / Ubuntu)

apt-cache madison eclipse-threadx sudo apt install eclipse-threadx=<VERSION_BEFORE_6.0.1> sudo apt-mark hold eclipse-threadx

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list eclipse-threadx sudo dnf downgrade eclipse-threadx-<VERSION_BEFORE_6.0.1> sudo dnf versionlock add eclipse-threadx

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Advisories and coverage

Research and news

VulDB Recent Entries: CVE-2026-115653 | Eclipse ThreadX up to 6.5.2.202603 Cortex-M module ports PendSV handler stack-based overflow 2026-11-02

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-115653?

eclipse threadx: upgrade to newer than 6.5.2.202603. Exact commands for each OS are on this page.

Is CVE-2026-115653 being exploited?

CVE-2026-115653 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-115653 affect?

CVE-2026-115653 affects eclipse threadx. Severity is high (CVSS 7). 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 che

How urgent is CVE-2026-115653?

Priority 24/100. High severity

Related CVEs

CVE-2026-115654 MEDIUM 6.9 UPGRADE In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the Module Manager's thread-control services do not ch
CVE-2026-114408 HIGH 8.7 UPGRADE In Eclipse ThreadX NetX Duo versions 6.4.5.202504 through 6.5.2.202603a, built with IPv6 path MTU discovery, t

References

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