How severe is CVE-2016-6911?

CVE-2016-6911 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-6911 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6911?

CVE-2016-6911 affects Libgd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-6911?

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

When was CVE-2016-6911 published?

CVE-2016-6911 was published on 2017-01-26 and last updated on 2026-06-17.

CVE-2016-6911

CVE-2016-6911 is a medium-severity vulnerability in Libgd with a CVSS 3.x base score of 5.5. 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Libgd
Published: 2017-01-26
Last modified: 2026-06-17

Description

The dynamicGetbuf function in the GD Graphics Library (aka libgd) before 2.2.4 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted TIFF image.

Frequently asked questions

What is CVE-2016-6911?: The dynamicGetbuf function in the GD Graphics Library (aka libgd) before 2.2.4 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted TIFF image.
How severe is CVE-2016-6911?: CVE-2016-6911 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-6911 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6911?: CVE-2016-6911 affects Libgd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-6911?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-6911 published?: CVE-2016-6911 was published on 2017-01-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:libgd:libgd:*:*:*:*:*:*:*:*

More vulnerabilities in Libgd

CVE-2019-6978 — Critical (CVSS 9.8): The GD Graphics Library (aka LibGD) 2.2.5 has a double free in the gdImage*Ptr() functions in gd_gif_out.c, gd_jpeg.c,…
CVE-2016-10166 — Critical (CVSS 9.8): Integer underflow in the _gdContributionsAlloc function in gd_interpolation.c in the GD Graphics Library (aka libgd)…
CVE-2016-6912 — Critical (CVSS 9.8): Double free vulnerability in the gdImageWebPtr function in the GD Graphics Library (aka libgd) before 2.2.4 allows…
CVE-2016-8670 — Critical (CVSS 9.8): Integer signedness error in the dynamicGetbuf function in gd_io_dp.c in the GD Graphics Library (aka libgd) through…
CVE-2016-7568 — Critical (CVSS 9.8): Integer overflow in the gdImageWebpCtx function in gd_webp.c in the GD Graphics Library (aka libgd) through 2.2.3, as…
CVE-2016-3074 — Critical (CVSS 9.8): Integer signedness error in GD Graphics Library 2.1.1 (aka libgd or libgd2) allows remote attackers to cause a denial…

All CVEs affecting Libgd →

Other CWE-125 (Out-of-bounds Read) vulnerabilities

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CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
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