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CVE-2026-12413

An invalidly formatted IKEv2 fragment causes the Libreswan pluto daemon to crash and restart. Continued exploitation would cause a denial of service. The function reassemble_v2_incoming_fragments() would ignore unknown outer payloads but still store these in a fixed size array msg_digest.digest[PAYLIMIT]. An off-by-one error in the assertion PASSERT(logger, md->digest_roof < elemsof(md->digest)) causes the daemon to abort. No remote code execution is possible. Any configuration that allows IKEv2
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5d08b669a0684a6e2a8c871a19c83ba8905bc9c36ac9ce0c4dfbf63e7f42d06c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-193","description":"Off-by-one Error","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c683edfb7c0e1c6e842aa0e03458b271f0902f413f233ba2ad16f7660f5c7ae8 · sha256:b03280760a0717f0… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-617","description":"Reachable Assertion","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c683edfb7c0e1c6e842aa0e03458b271f0902f413f233ba2ad16f7660f5c7ae8 · sha256:b03280760a0717f0… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"libreswan","vendor":"The Libreswan Project","versions":[{"lessThanOrEqual":"5.3","status":"affected","version":"4.6","versionType":"semver"},{"status":"unaffected","version":"5.3.1","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c683edfb7c0e1c6e842aa0e03458b271f0902f413f233ba2ad16f7660f5c7ae8 · sha256:b03280760a0717f0… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"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:c683edfb7c0e1c6e842aa0e03458b271f0902f413f233ba2ad16f7660f5c7ae8 · sha256:b03280760a0717f0… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-193","description":"Off-by-one Error","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c683edfb7c0e1c6e842aa0e03458b271f0902f413f233ba2ad16f7660f5c7ae8 · sha256:b03280760a0717f0… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-617","description":"Reachable Assertion","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c683edfb7c0e1c6e842aa0e03458b271f0902f413f233ba2ad16f7660f5c7ae8 · sha256:b03280760a0717f0… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions
{"name":"Libreswan CVE-2026-12413 Patches","url":"https://libreswan.org/security/CVE-2026-12413/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c683edfb7c0e1c6e842aa0e03458b271f0902f413f233ba2ad16f7660f5c7ae8 · sha256:b03280760a0717f0… · /containers/cna/references/1
{"name":"Libreswan Security Advisory","url":"https://libreswan.org/security/CVE-2026-12413/CVE-2026-12413.txt"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c683edfb7c0e1c6e842aa0e03458b271f0902f413f233ba2ad16f7660f5c7ae8 · sha256:b03280760a0717f0… · /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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