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CVE-2026-21863

A flaw was found in Valkey, a distributed key-value database. A malicious actor with access to the Valkey clusterbus port can exploit an input validation vulnerability by sending a specially crafted invalid clusterbus packet. This lack of validation for clusterbus ping extension packets can lead to an out-of-bounds read. Consequently, this may cause the system to crash, resulting in a Denial of Service (DoS).
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:66b3889d0a98f295cb692ea1126cecf93b187f403b458d07d48dfbdc65759e71
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 5 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"affected","packageName":"valkey-main","product":"Red Hat Hardened Images","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"9.0.3-1.2.hum1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"defaultStatus":"affected","packageName":"valkey","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:8.0.7-1.el10_0","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.1"],"defaultStatus":"affected","packageName":"valkey","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:8.0.7-1.el10_1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"valkey","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:8.0.7-1.el9_7","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/affected/2

{"product":"valkey","vendor":"valkey-io","versions":[{"status":"affected","version":"< 7.2.12"},{"status":"affected","version":">= 8.0.0, < 8.0.7"},{"status":"affected","version":">= 8.1.0, < 8.1.6"},{"status":"affected","version":">= 9.0.0, < 9.0.2"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/cna/affected/0
cwe · 2 assertions

{"cweId":"CWE-125","description":"Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/problemTypes/0/descriptions/0

{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

5 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"affected","packageName":"valkey-main","product":"Red Hat Hardened Images","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"9.0.3-1.2.hum1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"defaultStatus":"affected","packageName":"valkey","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:8.0.7-1.el10_0","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.1"],"defaultStatus":"affected","packageName":"valkey","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:8.0.7-1.el10_1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"valkey","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:8.0.7-1.el9_7","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/affected/2
{"product":"valkey","vendor":"valkey-io","versions":[{"status":"affected","version":"< 7.2.12"},{"status":"affected","version":">= 8.0.0, < 8.0.7"},{"status":"affected","version":">= 8.1.0, < 8.1.6"},{"status":"affected","version":">= 9.0.0, < 9.0.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-125","description":"Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/problemTypes/0/descriptions/0
{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:3443"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/references/4
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:3507"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/references/5
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:5445"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/references/3
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:8753"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/references/6
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-21863"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/references/0
{"name":"RHBZ#2442026","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2442026"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/references/1
{"name":"https://github.com/valkey-io/valkey/security/advisories/GHSA-c677-q3wr-gggq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/valkey-io/valkey/security/advisories/GHSA-c677-q3wr-gggq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21863.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2376adcc2b67fc008b40322b4cab0727434447651b4bce7999e3d2009cea743 · sha256:87c1ee2b83cb149f… · /containers/adp/1/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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