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CVE-2026-55958

Out-of-bounds write in the Renesas TSIP TLS 1.3 transcript buffer. In tsip_StoreMessage() the capacity check guarding the fixed message bag (MSGBAG_SIZE) sets an error code but fails to return, so execution falls through to an XMEMCPY that writes past the end of the buffer once the accumulated TLS 1.3 handshake transcript exceeds MSGBAG_SIZE (8 KB), corrupting adjacent heap state and potentially causing a remote denial of service crash. The bag is sized to hold a normal handshake, so this is rea
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:95aa90bb296434416ed5632f7efe3b05b5a6cca3dbddea0fd715439a26e67ae3
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-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a4e4428ab08688273824f93a871ee86e69ad1646cf4d5aac4e60f74a9eb30e41 · sha256:e349b28246bcb894… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-393","description":"CWE-393 Return of Wrong Status Code","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a4e4428ab08688273824f93a871ee86e69ad1646cf4d5aac4e60f74a9eb30e41 · sha256:e349b28246bcb894… · /containers/cna/problemTypes/0/descriptions/1

Affected products and versions

1 source assertion
{"collectionURL":"https://github.com/wolfSSL/wolfssl","defaultStatus":"unaffected","product":"wolfSSL","vendor":"wolfSSL","versions":[{"lessThanOrEqual":"5.9.1","status":"affected","version":"5.4.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a4e4428ab08688273824f93a871ee86e69ad1646cf4d5aac4e60f74a9eb30e41 · sha256:e349b28246bcb894… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.3,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a4e4428ab08688273824f93a871ee86e69ad1646cf4d5aac4e60f74a9eb30e41 · sha256:e349b28246bcb894… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a4e4428ab08688273824f93a871ee86e69ad1646cf4d5aac4e60f74a9eb30e41 · sha256:e349b28246bcb894… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-393","description":"CWE-393 Return of Wrong Status Code","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a4e4428ab08688273824f93a871ee86e69ad1646cf4d5aac4e60f74a9eb30e41 · sha256:e349b28246bcb894… · /containers/cna/problemTypes/0/descriptions/1

Source references

2 source assertions
{"tags":["patch"],"url":"https://github.com/wolfSSL/wolfssl/pull/10705"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a4e4428ab08688273824f93a871ee86e69ad1646cf4d5aac4e60f74a9eb30e41 · sha256:e349b28246bcb894… · /containers/cna/references/0
{"url":"https://www.wolfssl.com/docs/security-vulnerabilities/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a4e4428ab08688273824f93a871ee86e69ad1646cf4d5aac4e60f74a9eb30e41 · sha256:e349b28246bcb894… · /containers/cna/references/1

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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