How severe is CVE-2023-44821?

CVE-2023-44821 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-44821 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-44821?

CVE-2023-44821 affects Lcdf Gifsicle. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-44821?

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

When was CVE-2023-44821 published?

CVE-2023-44821 was published on 2023-10-09 and last updated on 2026-06-17.

CVE-2023-44821

CVE-2023-44821 is a medium-severity vulnerability in Lcdf Gifsicle 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-401.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-401
Affected product: Lcdf Gifsicle
Published: 2023-10-09
Last modified: 2026-06-17

Description

Gifsicle through 1.94, if deployed in a way that allows untrusted input to affect Gif_Realloc calls, might allow a denial of service (memory consumption). NOTE: this has been disputed by multiple parties because the Gifsicle code is not commonly used for unattended operation in which new input arrives for a long-running process, does not ship with functionality to link it into another application as a library, and does not have realistic use cases in which an adversary controls the entire command line.

Frequently asked questions

What is CVE-2023-44821?: Gifsicle through 1.94, if deployed in a way that allows untrusted input to affect Gif_Realloc calls, might allow a denial of service (memory consumption). NOTE: this has been disputed by multiple parties because the Gifsicle code is not commonly used for unattended operation in which new input arrives for a long-running process, does not ship with functionality to link it into another application as a library, and does not have realistic use cases in which an adversary controls the entire command line.
How severe is CVE-2023-44821?: CVE-2023-44821 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-44821 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-44821?: CVE-2023-44821 affects Lcdf Gifsicle. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-44821?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-44821 published?: CVE-2023-44821 was published on 2023-10-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lcdf:gifsicle:*:*:*:*:*:*:*:*

More vulnerabilities in Lcdf Gifsicle

CVE-2017-1000421 — Critical (CVSS 9.8): Gifsicle gifview 1.89 and older is vulnerable to a use-after-free in the read_gif function resulting potential code…
CVE-2023-46009 — High (CVSS 7.8): gifsicle-1.94 was found to have a floating point exception (FPE) vulnerability via resize_stream at src/xform.c.
CVE-2023-36193 — High (CVSS 7.8): Gifsicle v1.9.3 was discovered to contain a heap buffer overflow via the ambiguity_error component at /src/clp.c.
CVE-2017-18120 — High (CVSS 7.8): A double-free bug in the read_gif function in gifread.c in gifsicle 1.90 allows a remote attacker to cause a…
CVE-2020-19752 — High (CVSS 7.5): The find_color_or_error function in gifsicle 1.92 contains a NULL pointer dereference.

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