{"api_version":"1","generated_at":"2026-05-11T11:02:45+00:00","cve":"CVE-2026-43341","urls":{"html":"https://cve.report/CVE-2026-43341","api":"https://cve.report/api/cve/CVE-2026-43341.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43341","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43341"},"summary":{"title":"net/ipv6: ioam6: prevent schema length wraparound in trace fill","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/ipv6: ioam6: prevent schema length wraparound in trace fill\n\nioam6_fill_trace_data() stores the schema contribution to the trace\nlength in a u8. With bit 22 enabled and the largest schema payload,\nsclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the\nremaining-space check. __ioam6_fill_trace_data() then positions the\nwrite cursor without reserving the schema area but still copies the\n4-byte schema header and the full schema payload, overrunning the trace\nbuffer.\n\nKeep sclen in an unsigned int so the remaining-space check and the write\ncursor calculation both see the full schema length.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-08 14:16:44","updated_at":"2026-05-11 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Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43341","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8c6f6fa6772696be0c047a711858084b38763728 e96d48b37708d53cbdc47f6f60b0714fc4a5f596 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8c6f6fa6772696be0c047a711858084b38763728 d1b041080086e91d3733a5438a8c51ad5d3d8e09 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8c6f6fa6772696be0c047a711858084b38763728 77695a69baca9b99d95fad09fc78c2318736604f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8c6f6fa6772696be0c047a711858084b38763728 184d2e9db27c0f76226b5cad16fe29510a5d2280 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"43341","cve":"CVE-2026-43341","epss":"0.000240000","percentile":"0.070400000","score_date":"2026-05-10","updated_at":"2026-05-11 00:14:41"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv6/ioam6.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e96d48b37708d53cbdc47f6f60b0714fc4a5f596","status":"affected","version":"8c6f6fa6772696be0c047a711858084b38763728","versionType":"git"},{"lessThan":"d1b041080086e91d3733a5438a8c51ad5d3d8e09","status":"affected","version":"8c6f6fa6772696be0c047a711858084b38763728","versionType":"git"},{"lessThan":"77695a69baca9b99d95fad09fc78c2318736604f","status":"affected","version":"8c6f6fa6772696be0c047a711858084b38763728","versionType":"git"},{"lessThan":"184d2e9db27c0f76226b5cad16fe29510a5d2280","status":"affected","version":"8c6f6fa6772696be0c047a711858084b38763728","versionType":"git"},{"lessThan":"d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d","status":"affected","version":"8c6f6fa6772696be0c047a711858084b38763728","versionType":"git"},{"lessThan":"5e67ba9bb531e1ec6599a82a065dea9040b9ce50","status":"affected","version":"8c6f6fa6772696be0c047a711858084b38763728","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/ioam6.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.15"},{"lessThan":"5.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.134","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.81","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.22","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.168","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.134","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.81","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.22","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.12","versionStartIncluding":"5.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"5.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/ipv6: ioam6: prevent schema length wraparound in trace fill\n\nioam6_fill_trace_data() stores the schema contribution to the trace\nlength in a u8. With bit 22 enabled and the largest schema payload,\nsclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the\nremaining-space check. __ioam6_fill_trace_data() then positions the\nwrite cursor without reserving the schema area but still copies the\n4-byte schema header and the full schema payload, overrunning the trace\nbuffer.\n\nKeep sclen in an unsigned int so the remaining-space check and the write\ncursor calculation both see the full schema length."}],"metrics":[{"cvssV3_1":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-05-11T06:33:26.540Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/e96d48b37708d53cbdc47f6f60b0714fc4a5f596"},{"url":"https://git.kernel.org/stable/c/d1b041080086e91d3733a5438a8c51ad5d3d8e09"},{"url":"https://git.kernel.org/stable/c/77695a69baca9b99d95fad09fc78c2318736604f"},{"url":"https://git.kernel.org/stable/c/184d2e9db27c0f76226b5cad16fe29510a5d2280"},{"url":"https://git.kernel.org/stable/c/d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d"},{"url":"https://git.kernel.org/stable/c/5e67ba9bb531e1ec6599a82a065dea9040b9ce50"}],"title":"net/ipv6: ioam6: prevent schema length wraparound in trace fill","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43341","datePublished":"2026-05-08T13:37:19.256Z","dateReserved":"2026-05-01T14:12:56.003Z","dateUpdated":"2026-05-11T06:33:26.540Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-08 14:16:44","lastModifiedDate":"2026-05-11 08:16:10","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43341","Ordinal":"1","Title":"net/ipv6: ioam6: prevent schema length wraparound in trace fill","CVE":"CVE-2026-43341","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43341","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/ipv6: ioam6: prevent schema length wraparound in trace fill\n\nioam6_fill_trace_data() stores the schema contribution to the trace\nlength in a u8. With bit 22 enabled and the largest schema payload,\nsclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the\nremaining-space check. __ioam6_fill_trace_data() then positions the\nwrite cursor without reserving the schema area but still copies the\n4-byte schema header and the full schema payload, overrunning the trace\nbuffer.\n\nKeep sclen in an unsigned int so the remaining-space check and the write\ncursor calculation both see the full schema length.","Type":"Description","Title":"net/ipv6: ioam6: prevent schema length wraparound in trace fill"}]}}}