How severe is CVE-2017-9871?

CVE-2017-9871 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-9871 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-2017-9871?

CVE-2017-9871 affects Lame Project Lame. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-9871?

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.

When was CVE-2017-9871 published?

CVE-2017-9871 was published on 2017-06-25 and last updated on 2026-06-17.

CVE-2017-9871

CVE-2017-9871 is a high-severity vulnerability in Lame Project Lame with a CVSS 3.x base score of 7.8. 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-119.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Lame Project Lame
Published: 2017-06-25
Last modified: 2026-06-17

Description

The III_i_stereo function in layer3.c in mpglib, as used in libmpgdecoder.a in LAME 3.99.5 and other products, allows remote attackers to cause a denial of service (stack-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted audio file.

Frequently asked questions

What is CVE-2017-9871?: The III_i_stereo function in layer3.c in mpglib, as used in libmpgdecoder.a in LAME 3.99.5 and other products, allows remote attackers to cause a denial of service (stack-based buffer overflow and application crash) or possibly have unspecified other impact via a crafted audio file.
How severe is CVE-2017-9871?: CVE-2017-9871 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-9871 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-2017-9871?: CVE-2017-9871 affects Lame Project Lame. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-9871?: 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.
When was CVE-2017-9871 published?: CVE-2017-9871 was published on 2017-06-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lame_project:lame:3.99.5:*:*:*:*:*:*:*

More vulnerabilities in Lame Project Lame

CVE-2017-11720 — Critical (CVSS 9.8): There is a division-by-zero vulnerability in LAME 3.99.5, caused by a malformed input file.
CVE-2017-15019 — High (CVSS 7.8): LAME 3.99.5 has a NULL Pointer Dereference in the hip_decode_init function within libmp3lame/mpglib_interface.c via a…
CVE-2017-9872 — High (CVSS 7.8): The III_dequantize_sample function in layer3.c in mpglib, as used in libmpgdecoder.a in LAME 3.99.5 and other products,…
CVE-2017-8419 — High (CVSS 7.8): LAME through 3.99.5 relies on the signed integer data type for values in a WAV or AIFF header, which allows remote…
CVE-2017-13712 — High (CVSS 7.5): NULL Pointer Dereference in the id3v2AddAudioDuration function in libmp3lame/id3tag.c in LAME 3.99.5 allows attackers…
CVE-2017-15046 — Medium (CVSS 5.5): LAME 3.99.5, 3.99.4, 3.98.4, 3.98.2, 3.98 and 3.97 have a stack-based buffer overflow in unpack_read_samples in…

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