CVE Explorer

CVE-2026-54417

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. When the header size field is a multiple of 512 in the range 0xFFFFFC01-0xFFFFFE00 (e.g. 0xFFFFFE00), the addition wraps to 0, so mtar_next() seeks to the

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bfa5cd15a095b73c531ac2aaeefde8f4be7185136a053986769a11cc9ea1a486

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

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:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/metrics/0/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"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:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/metrics/1/cvssV4_0

cwe · 2 assertions

{"cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-835","description":"CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"collectionURL":"https://github.com/rxi/microtar","defaultStatus":"affected","product":"microtar","programFiles":["src/microtar.c"],"programRoutines":[{"name":"mtar_next"}],"repo":"https://github.com/rxi/microtar","vendor":"rxi","versions":[{"status":"affected","version":"0.1.0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/metrics/0/cvssV3_1

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/metrics/1/cvssV4_0

CWE assertions

2 source assertions

{"cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-835","description":"CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/problemTypes/1/descriptions/0

Source references

3 source assertions

{"tags":["product"],"url":"https://github.com/rxi/microtar"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/references/1

{"tags":["product"],"url":"https://github.com/rxi/microtar/blob/master/src/microtar.c#L239"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/references/0

{"name":"Vulnerable source code: src/microtar.c (mtar_next)","tags":["technical-description"],"url":"https://raw.githubusercontent.com/rxi/microtar/master/src/microtar.c"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:8098c313159dbf593341dabb72224312467656bc442b98fa24ab68ae55e59ee9 · sha256:e3e534b64328ad3e… · /containers/cna/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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