{"api_version":"1","generated_at":"2026-10-05T18:08:21+00:00","cve":"CVE-2026-90274","urls":{"html":"https://cve.report/CVE-2026-90274","api":"https://cve.report/api/cve/CVE-2026-90274.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90274","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90274"},"summary":{"title":"coresight: etm4x: fix underflow for usage of (nrseqstate - 1)","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: etm4x: fix underflow for usage of (nrseqstate - 1)\n\nAccording to IHI006H Embedded Trace Macrocell Architecture\nSpecification[0], TRCSEQEVR<n> is implemented only when\nTRCIDR5.NUMSEQSTATE is 0b100, in which case n ranges from 0 to 2;\notherwise, TRCIDR5.NUMSEQSTATE is 0b000.\n\nIOW, the number of usage in the initialisation or setting\nTRCSEQEVR<n> with drvdata->nrseqstate - 1 in the loop could make\nunderflow issue when TRCIDR5.NUMSEQSTATE is 0b000.\n\nTherefore, introduce nr_seq_ctrls field and untie it from nrseqstate.\nAs part of this introduce ETM_MAX_SEQ_TRANSITIONS macro and\napply nr_seq_ctrls and above macro to TRCSEQEVR<n> relevant fields setup.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:23","updated_at":"2026-09-17 17:17:23"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/1674d9bff8073bdee5dbc200f56fc3caa28d0566","name":"https://git.kernel.org/stable/c/1674d9bff8073bdee5dbc200f56fc3caa28d0566","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5ac900f73ce1d4d8308f40752b51bc8a02b244d2","name":"https://git.kernel.org/stable/c/5ac900f73ce1d4d8308f40752b51bc8a02b244d2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148","name":"https://git.kernel.org/stable/c/be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4f9a0f548413bf864f609c9f4bc56e3f1b3577d4","name":"https://git.kernel.org/stable/c/4f9a0f548413bf864f609c9f4bc56e3f1b3577d4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1ade9a335c69fc735cb7b3f222ed35ab135540fb","name":"https://git.kernel.org/stable/c/1ade9a335c69fc735cb7b3f222ed35ab135540fb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8d669db59f7283b838e029af29da12e505265fae","name":"https://git.kernel.org/stable/c/8d669db59f7283b838e029af29da12e505265fae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4091f2d5b26d117c992ffcce1a5df425a0daedcd","name":"https://git.kernel.org/stable/c/4091f2d5b26d117c992ffcce1a5df425a0daedcd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90274","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90274","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2e1cdfe184b5202d51e0611d7a051e2bea303946 8d669db59f7283b838e029af29da12e505265fae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2e1cdfe184b5202d51e0611d7a051e2bea303946 4091f2d5b26d117c992ffcce1a5df425a0daedcd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2e1cdfe184b5202d51e0611d7a051e2bea303946 be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2e1cdfe184b5202d51e0611d7a051e2bea303946 4f9a0f548413bf864f609c9f4bc56e3f1b3577d4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2e1cdfe184b5202d51e0611d7a051e2bea303946 1ade9a335c69fc735cb7b3f222ed35ab135540fb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2e1cdfe184b5202d51e0611d7a051e2bea303946 5ac900f73ce1d4d8308f40752b51bc8a02b244d2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2e1cdfe184b5202d51e0611d7a051e2bea303946 1674d9bff8073bdee5dbc200f56fc3caa28d0566 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.2","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/hwtracing/coresight/coresight-etm4x-cfg.c","drivers/hwtracing/coresight/coresight-etm4x-core.c","drivers/hwtracing/coresight/coresight-etm4x-sysfs.c","drivers/hwtracing/coresight/coresight-etm4x.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8d669db59f7283b838e029af29da12e505265fae","status":"affected","version":"2e1cdfe184b5202d51e0611d7a051e2bea303946","versionType":"git"},{"lessThan":"4091f2d5b26d117c992ffcce1a5df425a0daedcd","status":"affected","version":"2e1cdfe184b5202d51e0611d7a051e2bea303946","versionType":"git"},{"lessThan":"be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148","status":"affected","version":"2e1cdfe184b5202d51e0611d7a051e2bea303946","versionType":"git"},{"lessThan":"4f9a0f548413bf864f609c9f4bc56e3f1b3577d4","status":"affected","version":"2e1cdfe184b5202d51e0611d7a051e2bea303946","versionType":"git"},{"lessThan":"1ade9a335c69fc735cb7b3f222ed35ab135540fb","status":"affected","version":"2e1cdfe184b5202d51e0611d7a051e2bea303946","versionType":"git"},{"lessThan":"5ac900f73ce1d4d8308f40752b51bc8a02b244d2","status":"affected","version":"2e1cdfe184b5202d51e0611d7a051e2bea303946","versionType":"git"},{"lessThan":"1674d9bff8073bdee5dbc200f56fc3caa28d0566","status":"affected","version":"2e1cdfe184b5202d51e0611d7a051e2bea303946","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/hwtracing/coresight/coresight-etm4x-cfg.c","drivers/hwtracing/coresight/coresight-etm4x-core.c","drivers/hwtracing/coresight/coresight-etm4x-sysfs.c","drivers/hwtracing/coresight/coresight-etm4x.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.2"},{"lessThan":"4.2","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"4.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"4.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: etm4x: fix underflow for usage of (nrseqstate - 1)\n\nAccording to IHI006H Embedded Trace Macrocell Architecture\nSpecification[0], TRCSEQEVR<n> is implemented only when\nTRCIDR5.NUMSEQSTATE is 0b100, in which case n ranges from 0 to 2;\notherwise, TRCIDR5.NUMSEQSTATE is 0b000.\n\nIOW, the number of usage in the initialisation or setting\nTRCSEQEVR<n> with drvdata->nrseqstate - 1 in the loop could make\nunderflow issue when TRCIDR5.NUMSEQSTATE is 0b000.\n\nTherefore, introduce nr_seq_ctrls field and untie it from nrseqstate.\nAs part of this introduce ETM_MAX_SEQ_TRANSITIONS macro and\napply nr_seq_ctrls and above macro to TRCSEQEVR<n> relevant fields setup."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:08:07.269Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/8d669db59f7283b838e029af29da12e505265fae"},{"url":"https://git.kernel.org/stable/c/4091f2d5b26d117c992ffcce1a5df425a0daedcd"},{"url":"https://git.kernel.org/stable/c/be7b2de5b9a96ae68ffa3528e0a40d63e0fd8148"},{"url":"https://git.kernel.org/stable/c/4f9a0f548413bf864f609c9f4bc56e3f1b3577d4"},{"url":"https://git.kernel.org/stable/c/1ade9a335c69fc735cb7b3f222ed35ab135540fb"},{"url":"https://git.kernel.org/stable/c/5ac900f73ce1d4d8308f40752b51bc8a02b244d2"},{"url":"https://git.kernel.org/stable/c/1674d9bff8073bdee5dbc200f56fc3caa28d0566"}],"title":"coresight: etm4x: fix underflow for usage of (nrseqstate - 1)","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90274","datePublished":"2026-09-17T16:08:07.269Z","dateReserved":"2026-09-11T19:38:34.797Z","dateUpdated":"2026-09-17T16:08:07.269Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:23","lastModifiedDate":"2026-09-17 17:17:23","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90274","Ordinal":"1","Title":"coresight: etm4x: fix underflow for usage of (nrseqstate - 1)","CVE":"CVE-2026-90274","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90274","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: etm4x: fix underflow for usage of (nrseqstate - 1)\n\nAccording to IHI006H Embedded Trace Macrocell Architecture\nSpecification[0], TRCSEQEVR<n> is implemented only when\nTRCIDR5.NUMSEQSTATE is 0b100, in which case n ranges from 0 to 2;\notherwise, TRCIDR5.NUMSEQSTATE is 0b000.\n\nIOW, the number of usage in the initialisation or setting\nTRCSEQEVR<n> with drvdata->nrseqstate - 1 in the loop could make\nunderflow issue when TRCIDR5.NUMSEQSTATE is 0b000.\n\nTherefore, introduce nr_seq_ctrls field and untie it from nrseqstate.\nAs part of this introduce ETM_MAX_SEQ_TRANSITIONS macro and\napply nr_seq_ctrls and above macro to TRCSEQEVR<n> relevant fields setup.","Type":"Description","Title":"coresight: etm4x: fix underflow for usage of (nrseqstate - 1)"}]}}}