{"id":"CVE-2026-54417","state":"PUBLISHED","title":"Integer Overflow in rxi/microtar mtar_next() Causes Infinite Loop DoS","description":"An integer overflow in the mtar_next function in src/microtar.c in rxi microtar 0.1.0 allows a remote attacker to cause a denial of service (uncontrolled CPU consumption / infinite loop) via a crafted tar archive. mtar_next computes the offset to the next record as round_up(h.size, 512) + sizeof(mtar_raw_header_t) using 32-bit arithmetic.","publishedAt":"2026-06-17T13:25:54.502Z","updatedAt":"2026-08-10T11:44:08.688Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"TuranSec"},"assigner":"TuranSec","products":["rxi microtar"],"affected":[{"vendor":"rxi","product":"microtar","defaultStatus":"affected","versions":[{"version":"0.1.0","status":"affected","versionType":"semver"}],"collectionURL":"https://github.com/rxi/microtar","repo":"https://github.com/rxi/microtar","programFiles":["src/microtar.c"],"programRoutines":[{"name":"mtar_next"}]}],"references":["https://github.com/rxi/microtar/blob/master/src/microtar.c#L239","https://github.com/rxi/microtar","https://raw.githubusercontent.com/rxi/microtar/master/src/microtar.c"],"weaknesses":["CWE-190","CWE-835"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54417.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54417","state":"PUBLISHED","datePublished":"2026-06-17T13:25:54.502Z","dateUpdated":"2026-08-10T11:44:08.688Z","assignerShortName":"TuranSec","assignerOrgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","dateReserved":"2026-06-13T16:39:46.122Z"},"containers":{"cna":{"title":"Integer Overflow in rxi/microtar mtar_next() Causes Infinite Loop DoS","descriptions":[{"lang":"en","value":"An integer overflow in the mtar_next function in src/microtar.c in rxi microtar 0.1.0 allows a remote attacker to cause a denial of service (uncontrolled CPU consumption / infinite loop) via a crafted tar archive. mtar_next computes the offset to the next record as round_up(h.size, 512) + sizeof(mtar_raw_header_t) using 32-bit arithmetic."}],"affected":[{"vendor":"rxi","product":"microtar","defaultStatus":"affected","versions":[{"version":"0.1.0","status":"affected","versionType":"semver"}],"collectionURL":"https://github.com/rxi/microtar","repo":"https://github.com/rxi/microtar","programFiles":["src/microtar.c"],"programRoutines":[{"name":"mtar_next"}]}],"references":[{"url":"https://github.com/rxi/microtar/blob/master/src/microtar.c#L239","tags":["product"]},{"url":"https://github.com/rxi/microtar","tags":["product"]},{"url":"https://raw.githubusercontent.com/rxi/microtar/master/src/microtar.c","name":"Vulnerable source code: src/microtar.c (mtar_next)","tags":["technical-description"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":7.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.7,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","lang":"en","description":"CWE-190 Integer Overflow or Wraparound","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-835","lang":"en","description":"CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')","type":"CWE"}]}],"providerMetadata":{"shortName":"TuranSec","orgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","dateUpdated":"2026-08-10T11:44:08.688Z"},"credits":[{"lang":"en","value":"Saidakbarxon Maxsudxonov","type":"reporter"}],"source":{"discovery":"EXTERNAL"},"datePublic":"2026-06-17T13:25:54.502Z"},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-17T15:01:28.255429Z","id":"CVE-2026-54417","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-17T15:01:35.358Z"}}]}}}