CVE-2021-40812
CVE-2021-40812 is a medium-severity vulnerability in Libgd with a CVSS 3.x base score of 6.5. 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 6.5)
- CVSS v2: 4.3
- EPSS exploit prediction: 2% (74th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-125
- Affected product: Libgd
- Published:
- Last modified:
Description
The GD Graphics Library (aka LibGD) through 2.3.2 has an out-of-bounds read because of the lack of certain gdGetBuf and gdPutBuf return value checks.
Frequently asked questions
- What is CVE-2021-40812?
- The GD Graphics Library (aka LibGD) through 2.3.2 has an out-of-bounds read because of the lack of certain gdGetBuf and gdPutBuf return value checks.
- How severe is CVE-2021-40812?
- CVE-2021-40812 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2021-40812 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-40812?
- CVE-2021-40812 affects Libgd. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-40812?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-40812 published?
- CVE-2021-40812 was published on 2021-09-08 and last updated on 2026-06-17.
References
- https://github.com/libgd/libgd/commit/6f5136821be86e7068fcdf651ae9420b5d42e9a9
- https://github.com/libgd/libgd/issues/750#issuecomment-914872385
- https://lists.debian.org/debian-lts-announce/2024/04/msg00003.html
Affected products (1)
- cpe:2.3:a:libgd:libgd:*:*:*:*:*:*:*:*
More vulnerabilities in Libgd
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- 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…
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- 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…
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