CVE-2025-47869: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability was discovered in Apache

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CRITICAL 9.8REMOTEWATCHLISTUPGRADE

CVE-2025-47869 is a critical-severity flaw (CVSS 9.8) affecting nuttx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability was discovered in Apache NuttX RTOS apps/exapmles/xmlrpc application. In this example application device stats structure that stored remotely provided parameters had hardcoded buffer size which could lead to buffer overflow. Structure members buffers were updated to valid size of CONFIG_XMLRPC_STRINGSIZE+1. This issue affects Apache NuttX RTOS users that may ha

Why this priority

Critical severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 45%)
CISA exploited list	No
Weakness	CWE-119
Published	2025-06-16
Last modified	2026-06-17

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-06-16 11:15 UTCPublished CVE record published
2026-06-17 09:28 UTCUpdated Record last modified

apache nuttx UPGRADE

Affected: >= 6.22 and < 12.9.0

Fixed in: 12.9.0

Safe to downgrade to: a release before 6.22

1. Check installed version

apt-cache policy nuttx || rpm -q nuttx || nuttx --version

2. UPGRADE to 12.9.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nuttx

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nuttx

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 6.22 (Debian / Ubuntu)

apt-cache madison nuttx sudo apt install nuttx=<VERSION_BEFORE_6.22> sudo apt-mark hold nuttx

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

dnf --showduplicates list nuttx sudo dnf downgrade nuttx-<VERSION_BEFORE_6.22> sudo dnf versionlock add nuttx

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.

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-2025-47869?

nuttx: upgrade to 12.9.0. Exact commands for each OS are on this page.

Is CVE-2025-47869 being exploited?

CVE-2025-47869 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-2025-47869 affect?

CVE-2025-47869 affects nuttx. Severity is critical (CVSS 9.8). Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability was discovered in Apache NuttX RTOS apps/exapmles/xmlrpc application. In this example application device stats structure that stored remotely provided par

How urgent is CVE-2025-47869?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2025-48769 HIGH 8.1 UPGRADE Use After Free vulnerability was discovered in fs/vfs/fs_rename code of the Apache NuttX RTOS, that due recurs
CVE-2025-48768 MEDIUM 6.5 UPGRADE Release of Invalid Pointer or Reference vulnerability was discovered in fs/inode/fs_inoderemove code of the Ap
CVE-2025-47868 CRITICAL 9.8 UPGRADE Out-of-bounds Write resulting in possible Heap-based Buffer Overflow vulnerability was discovered in tools/bdf
CVE-2025-35003 CRITICAL 9.8 UPGRADE Improper Restriction of Operations within the Bounds of a Memory Buffer and Stack-based Buffer Overflow vulner
CVE-2021-26461 CRITICAL 9.8 UPGRADE Apache Nuttx Versions prior to 10.1.0 are vulnerable to integer wrap-around in functions malloc, realloc and m

References

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