How severe is CVE-2025-48769?

CVE-2025-48769 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2025-48769 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-48769?

CVE-2025-48769 affects Apache Nuttx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-48769?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-48769 have an EU (EUVD) identifier?

Yes. CVE-2025-48769 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0010.

When was CVE-2025-48769 published?

CVE-2025-48769 was published on 2026-01-01 and last updated on 2026-06-17.

CVE-2025-48769

CVE-2025-48769 is a high-severity vulnerability in Apache Nuttx with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-0010
Weakness: CWE-416
Affected product: Apache Nuttx
Published: 2026-01-01
Last modified: 2026-06-17

Description

Use After Free vulnerability was discovered in fs/vfs/fs_rename code of the Apache NuttX RTOS, that due recursive implementation and single buffer use by two different pointer variables allowed arbitrary user provided size buffer reallocation and write to the previously freed heap chunk, that in specific cases could cause unintended virtual filesystem rename/move operation results. This issue affects Apache NuttX RTOS: from 7.20 before 12.11.0. Users of virtual filesystem based services with write access especially when exposed over the network (i.e. FTP) are affected and recommended to upgrade to version 12.11.0 that fixes the issue.

Frequently asked questions

What is CVE-2025-48769?: Use After Free vulnerability was discovered in fs/vfs/fs_rename code of the Apache NuttX RTOS, that due recursive implementation and single buffer use by two different pointer variables allowed arbitrary user provided size buffer reallocation and write to the previously freed heap chunk, that in specific cases could cause unintended virtual filesystem rename/move operation results. This issue affects Apache NuttX RTOS: from 7.20 before 12.11.0. Users of virtual filesystem based services with write access especially when exposed over the network (i.e. FTP) are affected and recommended to upgrade to version 12.11.0 that fixes the issue.
How severe is CVE-2025-48769?: CVE-2025-48769 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2025-48769 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-48769?: CVE-2025-48769 affects Apache Nuttx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-48769?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-48769 have an EU (EUVD) identifier?: Yes. CVE-2025-48769 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0010.
When was CVE-2025-48769 published?: CVE-2025-48769 was published on 2026-01-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:nuttx:*:*:*:*:*:*:*:*

More vulnerabilities in Apache Nuttx

CVE-2025-47869 — Critical (CVSS 9.8): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability was discovered in Apache NuttX…
CVE-2025-47868 — Critical (CVSS 9.8): Out-of-bounds Write resulting in possible Heap-based Buffer Overflow vulnerability was discovered in…
CVE-2025-35003 — Critical (CVSS 9.8): Improper Restriction of Operations within the Bounds of a Memory Buffer and Stack-based Buffer Overflow vulnerabilities…
CVE-2021-26461 — Critical (CVSS 9.8): Apache Nuttx Versions prior to 10.1.0 are vulnerable to integer wrap-around in functions malloc, realloc and memalign.…
CVE-2020-17529 — Critical (CVSS 9.8): Out-of-bounds Write vulnerability in TCP Stack of Apache NuttX (incubating) versions up to and including 9.1.0 and…
CVE-2020-1939 — Critical (CVSS 9.8): The Apache NuttX (Incubating) project provides an optional separate "apps" repository which contains various optional…

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Other CWE-416 (Use After Free) vulnerabilities

CVE-2026-13782 — Critical (CVSS 10.0): Use after free in Browser in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the…
CVE-2026-4725 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149…
CVE-2026-4688 — Critical (CVSS 10.0): Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox…
CVE-2025-24085 — Critical (CVSS 10.0): A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.3 and iPadOS 18.3,…
CVE-2024-43102 — Critical (CVSS 10.0): Concurrent removals of certain anonymous shared memory mappings by using the UMTX_SHM_DESTROY sub-request of…
CVE-2021-32495 — Critical (CVSS 10.0): Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory…

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