{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43341","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:56.003Z","datePublished":"2026-05-08T13:37:19.256Z","dateUpdated":"2026-05-11T22:22:41.878Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:22:41.878Z"},"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":{"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"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/ioam6.c"],"versions":[{"version":"8c6f6fa6772696be0c047a711858084b38763728","lessThan":"e96d48b37708d53cbdc47f6f60b0714fc4a5f596","status":"affected","versionType":"git"},{"version":"8c6f6fa6772696be0c047a711858084b38763728","lessThan":"d1b041080086e91d3733a5438a8c51ad5d3d8e09","status":"affected","versionType":"git"},{"version":"8c6f6fa6772696be0c047a711858084b38763728","lessThan":"77695a69baca9b99d95fad09fc78c2318736604f","status":"affected","versionType":"git"},{"version":"8c6f6fa6772696be0c047a711858084b38763728","lessThan":"184d2e9db27c0f76226b5cad16fe29510a5d2280","status":"affected","versionType":"git"},{"version":"8c6f6fa6772696be0c047a711858084b38763728","lessThan":"d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d","status":"affected","versionType":"git"},{"version":"8c6f6fa6772696be0c047a711858084b38763728","lessThan":"5e67ba9bb531e1ec6599a82a065dea9040b9ce50","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/ioam6.c"],"versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","status":"unaffected","versionType":"semver"},{"version":"6.1.168","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.134","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.81","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.22","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.12","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.6.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.12.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.18.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.19.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"7.0"}]}]}],"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"}}}}