How severe is CVE-2018-5744?

CVE-2018-5744 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-5744 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-5744?

CVE-2018-5744 primarily affects Isc Bind. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-5744?

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-2018-5744 published?

CVE-2018-5744 was published on 2019-10-09 and last updated on 2026-06-17.

CVE-2018-5744

CVE-2018-5744 is a high-severity vulnerability in Isc Bind with a CVSS 3.x base score of 7.5. 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-772.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-772
Affected product: Isc Bind
Published: 2019-10-09
Last modified: 2026-06-17

Description

A failure to free memory can occur when processing messages having a specific combination of EDNS options. Versions affected are: BIND 9.10.7 -> 9.10.8-P1, 9.11.3 -> 9.11.5-P1, 9.12.0 -> 9.12.3-P1, and versions 9.10.7-S1 -> 9.11.5-S3 of BIND 9 Supported Preview Edition. Versions 9.13.0 -> 9.13.6 of the 9.13 development branch are also affected.

Frequently asked questions

What is CVE-2018-5744?: A failure to free memory can occur when processing messages having a specific combination of EDNS options. Versions affected are: BIND 9.10.7 -> 9.10.8-P1, 9.11.3 -> 9.11.5-P1, 9.12.0 -> 9.12.3-P1, and versions 9.10.7-S1 -> 9.11.5-S3 of BIND 9 Supported Preview Edition. Versions 9.13.0 -> 9.13.6 of the 9.13 development branch are also affected.
How severe is CVE-2018-5744?: CVE-2018-5744 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-5744 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-5744?: CVE-2018-5744 primarily affects Isc Bind. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-5744?: 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-2018-5744 published?: CVE-2018-5744 was published on 2019-10-09 and last updated on 2026-06-17.

References

https://kb.isc.org/docs/cve-2018-5744

Affected products (13)

cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.10.8:-:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.10.8:p1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.10.8:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.10.8:rc2:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.11.5:-:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.11.5:p1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.11.5:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:*
cpe:2.3:a:isc:bind:9.12.3:-:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.12.3:p1:*:*:*:*:*:*
cpe:2.3:a:isc:bind:9.12.3:rc1:*:*:*:*:*:*

More vulnerabilities in Isc Bind

CVE-2008-0122 — Critical (CVSS 10.0): Off-by-one error in the inet_network function in libbind in ISC BIND 9.4.2 and earlier, as used in libc in FreeBSD 6.2…
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CVE-2017-14138 — Critical (CVSS 9.8): ImageMagick 7.0.6-5 has a memory leak vulnerability in ReadWEBPImage in coders/webp.c because memory is not freed in…
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CVE-2020-14339 — High (CVSS 8.8): A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This…
CVE-2018-19760 — High (CVSS 8.8): cfg_init in confuse.c in libConfuse 3.2.2 has a memory leak.

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