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CVE-2026-5172

A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2c182b9ac1e30c545f9dfaaecb0cfa397e7d59a781ffc877d309b74fa3bb98f3
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 7 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"dnsmasq","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/1

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"dnsmasq","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/4

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"dnsmasq","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:2.90-7.el10_2","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/0

{"product":"dnsmasq","vendor":"dnsmasq","versions":[{"lessThan":"2.92rel2","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"dnsmasq","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"dnsmasq","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/2

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"unaffected","packageName":"rhcos","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/5
cvss · 2 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:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/metrics/1/cvssV3_1

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/0/metrics/0/cvssV3_1
cwe · 2 assertions

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

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/problemTypes/0/descriptions/0

{"description":"CWE-787: Out-of-bounds Write","lang":"en"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

7 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"unknown","packageName":"dnsmasq","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/1
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"dnsmasq","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"dnsmasq","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:2.90-7.el10_2","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/0
{"product":"dnsmasq","vendor":"dnsmasq","versions":[{"lessThan":"2.92rel2","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"dnsmasq","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"unaffected","packageName":"dnsmasq","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"unaffected","packageName":"rhcos","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/affected/5

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:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/metrics/1/cvssV3_1
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/0/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:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/problemTypes/0/descriptions/0
{"description":"CWE-787: Out-of-bounds Write","lang":"en"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/cna/problemTypes/0/descriptions/0

Source references

10 source assertions
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:19158"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/references/3
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-5172"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/references/0
{"name":"RHBZ#2458521","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458521"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/references/1
{"url":"https://github.com/NixOS/nixpkgs/pull/519082"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/cna/references/3
{"url":"https://github.com/NixOS/nixpkgs/pull/519093"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/cna/references/4
{"url":"https://github.com/pi-hole/FTL/releases/tag/v6.6.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/cna/references/5
{"url":"https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/cna/references/1
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5172.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/adp/1/references/2
{"url":"https://thekelleys.org.uk/dnsmasq/CVE/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/cna/references/2
{"url":"https://www.kb.cert.org/vuls/id/471747"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:926d01be50f183ac158d3f9afbec23434fb86c7ca4625fe4630497bad4c3caa1 · sha256:0c58f4c095524373… · /containers/cna/references/0

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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