How severe is CVE-2018-20544?

CVE-2018-20544 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-2018-20544 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20544?

CVE-2018-20544 primarily affects Libcaca Project Libcaca. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-20544?

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

When was CVE-2018-20544 published?

CVE-2018-20544 was published on 2018-12-28 and last updated on 2026-06-17.

CVE-2018-20544

CVE-2018-20544 is a medium-severity vulnerability in Libcaca Project Libcaca 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-369.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-369
Affected product: Libcaca Project Libcaca
Published: 2018-12-28
Last modified: 2026-06-17

Description

There is floating point exception at caca/dither.c (function caca_dither_bitmap) in libcaca 0.99.beta19.

Frequently asked questions

What is CVE-2018-20544?: There is floating point exception at caca/dither.c (function caca_dither_bitmap) in libcaca 0.99.beta19.
How severe is CVE-2018-20544?: CVE-2018-20544 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-2018-20544 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20544?: CVE-2018-20544 primarily affects Libcaca Project Libcaca. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-20544?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20544 published?: CVE-2018-20544 was published on 2018-12-28 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:libcaca_project:libcaca:0.99:beta19:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

More vulnerabilities in Libcaca Project Libcaca

CVE-2018-20549 — High (CVSS 8.8): There is an illegal WRITE memory access at caca/file.c (function caca_file_read) in libcaca 0.99.beta19.
CVE-2018-20548 — High (CVSS 8.8): There is an illegal WRITE memory access at common-image.c (function load_image) in libcaca 0.99.beta19 for 1bpp data.
CVE-2018-20545 — High (CVSS 8.8): There is an illegal WRITE memory access at common-image.c (function load_image) in libcaca 0.99.beta19 for 4bpp data.
CVE-2018-20547 — High (CVSS 8.1): There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for 24bpp…
CVE-2018-20546 — High (CVSS 8.1): There is an illegal READ memory access at caca/dither.c (function get_rgba_default) in libcaca 0.99.beta19 for the…
CVE-2021-30499 — High (CVSS 7.8): A flaw was found in libcaca. A buffer overflow of export.c in function export_troff might lead to memory corruption and…

All CVEs affecting Libcaca Project Libcaca →

Other CWE-369 (Divide By Zero) vulnerabilities

CVE-2021-32494 — Critical (CVSS 10.0): Radare2 has a division by zero vulnerability in Mach-O parser's rebase_buffer function. This allow attackers to create…
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-2020-20892 — High (CVSS 8.8): An issue was discovered in function filter_frame in libavfilter/vf_lenscorrection.c in Ffmpeg 4.2.1, allows attackers…
CVE-2025-4637 — High (CVSS 8.7): Divide By Zero vulnerability in davisking dlib allows remote attackers to cause a denial of service via a crafted…
CVE-2026-37232 — High (CVSS 8.6): An issue was discovered in OpenAirInterface5G 2.4.0 (nr-softmodem) in the E2SM-KPM RAN Function's PRB utilization…
CVE-2024-26945 — High (CVSS 8.4): In the Linux kernel, the following vulnerability has been resolved: crypto: iaa - Fix nr_cpus < nr_iaa case If…

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