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Vulnerability Database · Debian · Package report

knot-resolver: vulnerability history, versions and safety

knot-resolver is a package in the Debian ecosystem. Vulert records 22 vulnerabilities for it across 42 releases, from Jan 2018 to Jul 2026. Each vulnerability names the versions it affects, the fixed version to move to, and a workaround where no fix has been published.

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22 vulnerabilities recorded U22
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6 with no fix published

No patched version yet — these are the ones to plan around.

See the unfixed vulnerabilities →
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1 in the last 12 months

Most recent disclosure 25 Jul 2026.

See the disclosure history →
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0 malicious-package vulnerabilities

No published version shipped hostile code.

See all knot-resolver vulnerabilities

Vulert verdict on knot-resolver i

Updated on 23 Oct 2026

Careful: 6 of the 22 vulnerabilities Vulert records for this package have no fix yet. Plan around those, or apply the workaround listed for each. The rest have a fixed version to move to.

Long-term outlook: usable, but needs attention 22 vulnerabilities on record across 8 years, 1 in the last year.

What to do: Plan around the 6 vulnerabilities with no published fix: each lists the affected range and any workaround that reduces exposure. No fix yet: Vulert alerts you the moment one is published. Monitor it with Vulert →

  • Vulnerabilities on record 22 over 8 years · 1 in the last year i
  • Latest disclosure 25 Jul 2026 i
  • Highest CVSS 7.5 i
  • With no published fix 6 i

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01 Versions

Which versions are affected

Every version Vulert holds for knot-resolver, newest first, with the vulnerabilities that name it. A version with a count of zero has no recorded vulnerabilities; open a version to see the vulnerabilities it is exposed to.

Newest 42 of 42 versions on record. Severity counts are the vulnerabilities recorded against that exact release.

02 Disclosure history

How often vulnerabilities are recorded

  • 2018 4
  • 2019 6
  • 2020 2
  • 2021 4
  • 2022 3
  • 2023 2
  • 2026 1

Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 1 of the 22 were recorded in the last 12 months.

03 Vulnerabilities

Recorded vulnerabilities for knot-resolver

The 5 most severe of 22 vulnerabilities recorded for this package

Search all 22 in the database →
Vulnerability Severity Fixed version ↓ Disclosed ↓
Traffic Amplification Vulnerability in Knot Resolver: CVE-2020-12667 7.5 high 5.1.1-0.1 19 May 2020
Assertion Failure in Knot Resolver: CVE-2021-40083 Vulnerability 7.5 high 5.3.1-1+deb11u1 25 Aug 2021
Denial of Service Vulnerability in Knot Resolver - CVE-2018-1110 7.5 high 2.3.0-1 30 Mar 2021
Amplification Attack Vulnerability in Knot Resolver: Resource Consumption Risk 7.5 high No fix published 21 Feb 2023
Denial of Service Vulnerability in Knot Resolver: CVE-2022-40188 7.5 high No fix published 23 Sep 2022

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Updated: 23/Oct/2026 · Vulnerabilities in our DB: 524315

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Questions

About knot-resolver

Is knot-resolver safe to use?

Vulert records 22 vulnerabilities for knot-resolver in Debian: 0 critical, 0 high, 0 medium and 0 low, plus 22 not yet rated. 6 of them have no published fix yet, so those are the ones to avoid or mitigate.

How many vulnerabilities does knot-resolver have?

22 vulnerabilities are recorded for knot-resolver in the Debian ecosystem: 0 critical, 0 high, 0 medium and 0 low, plus 22 not yet rated. The ledger on this page lists the same counts next to the date of the most recent disclosure.

How often are new knot-resolver vulnerabilities disclosed?

1 vulnerability was recorded for knot-resolver in the last 12 months, and the oldest entry in this database dates to 22 Jan 2018. Recency matters more than a lifetime total: it shows how actively new issues are being disclosed for the package you are considering.

Which versions of knot-resolver are affected?

Each vulnerability on this page lists the affected version range and the fixed version to move to. Open the vulnerability for the version you actually run — fixes are specific to a release line, not to the package as a whole.

How do I monitor knot-resolver for upcoming vulnerabilities?

Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the knot-resolver version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.