{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74391","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-15T05:44:03.891Z","datePublished":"2026-08-15T05:59:05.127Z","dateUpdated":"2026-08-17T05:18:30.085Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-17T05:18:30.085Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Bound synthetic-field strings with seq_buf\n\nThe synthetic field helpers build a prefixed synthetic variable name and\na generated hist command in fixed MAX_FILTER_STR_VAL buffers. The\ncurrent code appends those strings with raw strcat(), so long key lists,\nfield names, or saved filters can run past the end of the staging\nbuffers.\n\nBuild both strings with seq_buf and propagate -E2BIG if either the\nsynthetic variable name or the generated command exceeds\nMAX_FILTER_STR_VAL. This keeps the existing tracing-side limit while\nusing the helper intended for bounded command construction.\n\n[ sdr: Moved struct seq_buf *s for upside-down x-mas tree formatting ]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/trace_events_hist.c"],"versions":[{"version":"02205a6752f223779a1b0e9e8ffacbea6e717851","lessThan":"0c584c27f6649a93ec12061cc779a4bd8f7c1434","status":"affected","versionType":"git"},{"version":"02205a6752f223779a1b0e9e8ffacbea6e717851","lessThan":"88b901fdc1662b131ff908cbd017333b61e7acc8","status":"affected","versionType":"git"},{"version":"02205a6752f223779a1b0e9e8ffacbea6e717851","lessThan":"baa333b2700a7fa3529d504529c8c10060fd687c","status":"affected","versionType":"git"},{"version":"02205a6752f223779a1b0e9e8ffacbea6e717851","lessThan":"cf334620036ad2250e008c7e7bb6646a3938b7b0","status":"affected","versionType":"git"},{"version":"02205a6752f223779a1b0e9e8ffacbea6e717851","lessThan":"f07883450eb14d1cf020b55d9f3a7ec5683bcd26","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/trace_events_hist.c"],"versions":[{"version":"4.17","status":"affected"},{"version":"0","lessThan":"4.17","status":"unaffected","versionType":"semver"},{"version":"6.6.145","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.97","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.40","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.5","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","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":"4.17","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.17","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/0c584c27f6649a93ec12061cc779a4bd8f7c1434"},{"url":"https://git.kernel.org/stable/c/88b901fdc1662b131ff908cbd017333b61e7acc8"},{"url":"https://git.kernel.org/stable/c/baa333b2700a7fa3529d504529c8c10060fd687c"},{"url":"https://git.kernel.org/stable/c/cf334620036ad2250e008c7e7bb6646a3938b7b0"},{"url":"https://git.kernel.org/stable/c/f07883450eb14d1cf020b55d9f3a7ec5683bcd26"}],"title":"tracing: Bound synthetic-field strings with seq_buf","x_generator":{"engine":"bippy-1.2.0"}}}}