How severe is CVE-2025-25471?

CVE-2025-25471 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2025-25471 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-25471?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-25471 have an EU (EUVD) identifier?

Yes. CVE-2025-25471 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-4576.

When was CVE-2025-25471 published?

CVE-2025-25471 was published on 2025-02-18 and last updated on 2026-06-17.

CVE-2025-25471

CVE-2025-25471 is a medium-severity vulnerability with a CVSS 3.x base score of 4.3. 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-4576
Weakness: CWE-476
Published: 2025-02-18
Last modified: 2026-06-17

Description

FFmpeg git master before commit fd1772 was discovered to contain a NULL pointer dereference via the component libavformat/mov.c.

Frequently asked questions

What is CVE-2025-25471?: FFmpeg git master before commit fd1772 was discovered to contain a NULL pointer dereference via the component libavformat/mov.c.
How severe is CVE-2025-25471?: CVE-2025-25471 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2025-25471 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-25471?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-25471 have an EU (EUVD) identifier?: Yes. CVE-2025-25471 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-4576.
When was CVE-2025-25471 published?: CVE-2025-25471 was published on 2025-02-18 and last updated on 2026-06-17.

References

Other CWE-476 (NULL Pointer Dereference) vulnerabilities

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CVE-2020-14500 — Critical (CVSS 10.0): Secomea GateManager all versions prior to 9.2c, An attacker can send a negative value and overwrite arbitrary data.
CVE-2010-2495 — Critical (CVSS 10.0): The pppol2tp_xmit function in drivers/net/pppol2tp.c in the L2TP implementation in the Linux kernel before 2.6.34 does…
CVE-2026-46195 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building…
CVE-2026-31657 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by…
CVE-2026-31436 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix possible wrong descriptor…

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