{"api_version":"1","generated_at":"2026-09-18T01:40:50+00:00","cve":"CVE-2026-90386","urls":{"html":"https://cve.report/CVE-2026-90386","api":"https://cve.report/api/cve/CVE-2026-90386.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90386","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90386"},"summary":{"title":"i3c: dw: avoid shift-out-of-bounds when DAA assigns no devices","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: dw: avoid shift-out-of-bounds when DAA assigns no devices\n\nOn an empty bus ENTDAA assigns nothing, so cmd->rx_len (the count\nof addresses left unassigned) equals master->maxdevs.\n\nThe GENMASK() index master->maxdevs - cmd->rx_len - 1 then becomes -1,\nwhich trips up UBSAN. This happens every time on boot on a Gigabyte/AMD\nserver:\n\n    UBSAN: shift-out-of-bounds in drivers/i3c/master/dw-i3c-master.c:905:12\n    shift exponent 64 is too large for 64-bit type 'long unsigned int'\n    CPU: 7 UID: 0 PID: 963 Comm: (udev-worker) Not tainted 7.0.11-200.fc44.x86_64 #1 PREEMPT(lazy)\n    Hardware name: Giga Computing E163-Z34-AAH1-000/MZ33-DC1-000, BIOS R32_F45 04/01/2026\n    Call Trace:\n     <TASK>\n     dump_stack_lvl+0x5d/0x80\n     ubsan_epilogue+0x5/0x2b\n     __ubsan_handle_shift_out_of_bounds.cold+0xd7/0x1ab\n     dw_i3c_master_daa.cold+0x1b/0x96 [dw_i3c_master]\n     i3c_master_do_daa_ext.part.0+0x3e/0xf0 [i3c]\n\nSkip the mask when no new device was assigned.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:37","updated_at":"2026-09-17 17:17:37"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/63110ccc434e10d9e9d2c7d82ebfa8a6f9cedd94","name":"https://git.kernel.org/stable/c/63110ccc434e10d9e9d2c7d82ebfa8a6f9cedd94","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9eaac0cb4ca94e2e32c53c156ae5b813ba7ef90c","name":"https://git.kernel.org/stable/c/9eaac0cb4ca94e2e32c53c156ae5b813ba7ef90c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5650b013e6bfc14c8b30be727f4a715b01860a08","name":"https://git.kernel.org/stable/c/5650b013e6bfc14c8b30be727f4a715b01860a08","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/038cf48b3170af26a70bf2dee4f8c3ac910f5176","name":"https://git.kernel.org/stable/c/038cf48b3170af26a70bf2dee4f8c3ac910f5176","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3a1c35739efb69e8ec2a868113a0471a01bb8f29","name":"https://git.kernel.org/stable/c/3a1c35739efb69e8ec2a868113a0471a01bb8f29","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/618dd640ded6b94bbdb79c798a901ec564797033","name":"https://git.kernel.org/stable/c/618dd640ded6b94bbdb79c798a901ec564797033","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/754533e6169d1f10bdef7a6ba9bd7740b524e1d4","name":"https://git.kernel.org/stable/c/754533e6169d1f10bdef7a6ba9bd7740b524e1d4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/111f559e5b6461f5f6977275716e6c5d1eb7ea27","name":"https://git.kernel.org/stable/c/111f559e5b6461f5f6977275716e6c5d1eb7ea27","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90386","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90386","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef 5650b013e6bfc14c8b30be727f4a715b01860a08 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef 63110ccc434e10d9e9d2c7d82ebfa8a6f9cedd94 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef 3a1c35739efb69e8ec2a868113a0471a01bb8f29 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef 111f559e5b6461f5f6977275716e6c5d1eb7ea27 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef 754533e6169d1f10bdef7a6ba9bd7740b524e1d4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef 9eaac0cb4ca94e2e32c53c156ae5b813ba7ef90c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef 618dd640ded6b94bbdb79c798a901ec564797033 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef 038cf48b3170af26a70bf2dee4f8c3ac910f5176 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.270 5.10.* 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/i3c/master/dw-i3c-master.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5650b013e6bfc14c8b30be727f4a715b01860a08","status":"affected","version":"1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef","versionType":"git"},{"lessThan":"63110ccc434e10d9e9d2c7d82ebfa8a6f9cedd94","status":"affected","version":"1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef","versionType":"git"},{"lessThan":"3a1c35739efb69e8ec2a868113a0471a01bb8f29","status":"affected","version":"1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef","versionType":"git"},{"lessThan":"111f559e5b6461f5f6977275716e6c5d1eb7ea27","status":"affected","version":"1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef","versionType":"git"},{"lessThan":"754533e6169d1f10bdef7a6ba9bd7740b524e1d4","status":"affected","version":"1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef","versionType":"git"},{"lessThan":"9eaac0cb4ca94e2e32c53c156ae5b813ba7ef90c","status":"affected","version":"1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef","versionType":"git"},{"lessThan":"618dd640ded6b94bbdb79c798a901ec564797033","status":"affected","version":"1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef","versionType":"git"},{"lessThan":"038cf48b3170af26a70bf2dee4f8c3ac910f5176","status":"affected","version":"1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/i3c/master/dw-i3c-master.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.0"},{"lessThan":"5.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","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":"5.10.270","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"5.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: dw: avoid shift-out-of-bounds when DAA assigns no devices\n\nOn an empty bus ENTDAA assigns nothing, so cmd->rx_len (the count\nof addresses left unassigned) equals master->maxdevs.\n\nThe GENMASK() index master->maxdevs - cmd->rx_len - 1 then becomes -1,\nwhich trips up UBSAN. This happens every time on boot on a Gigabyte/AMD\nserver:\n\n    UBSAN: shift-out-of-bounds in drivers/i3c/master/dw-i3c-master.c:905:12\n    shift exponent 64 is too large for 64-bit type 'long unsigned int'\n    CPU: 7 UID: 0 PID: 963 Comm: (udev-worker) Not tainted 7.0.11-200.fc44.x86_64 #1 PREEMPT(lazy)\n    Hardware name: Giga Computing E163-Z34-AAH1-000/MZ33-DC1-000, BIOS R32_F45 04/01/2026\n    Call Trace:\n     <TASK>\n     dump_stack_lvl+0x5d/0x80\n     ubsan_epilogue+0x5/0x2b\n     __ubsan_handle_shift_out_of_bounds.cold+0xd7/0x1ab\n     dw_i3c_master_daa.cold+0x1b/0x96 [dw_i3c_master]\n     i3c_master_do_daa_ext.part.0+0x3e/0xf0 [i3c]\n\nSkip the mask when no new device was assigned."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:09:21.842Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/5650b013e6bfc14c8b30be727f4a715b01860a08"},{"url":"https://git.kernel.org/stable/c/63110ccc434e10d9e9d2c7d82ebfa8a6f9cedd94"},{"url":"https://git.kernel.org/stable/c/3a1c35739efb69e8ec2a868113a0471a01bb8f29"},{"url":"https://git.kernel.org/stable/c/111f559e5b6461f5f6977275716e6c5d1eb7ea27"},{"url":"https://git.kernel.org/stable/c/754533e6169d1f10bdef7a6ba9bd7740b524e1d4"},{"url":"https://git.kernel.org/stable/c/9eaac0cb4ca94e2e32c53c156ae5b813ba7ef90c"},{"url":"https://git.kernel.org/stable/c/618dd640ded6b94bbdb79c798a901ec564797033"},{"url":"https://git.kernel.org/stable/c/038cf48b3170af26a70bf2dee4f8c3ac910f5176"}],"title":"i3c: dw: avoid shift-out-of-bounds when DAA assigns no devices","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90386","datePublished":"2026-09-17T16:09:21.842Z","dateReserved":"2026-09-11T19:38:34.809Z","dateUpdated":"2026-09-17T16:09:21.842Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:37","lastModifiedDate":"2026-09-17 17:17:37","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90386","Ordinal":"1","Title":"i3c: dw: avoid shift-out-of-bounds when DAA assigns no devices","CVE":"CVE-2026-90386","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90386","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: dw: avoid shift-out-of-bounds when DAA assigns no devices\n\nOn an empty bus ENTDAA assigns nothing, so cmd->rx_len (the count\nof addresses left unassigned) equals master->maxdevs.\n\nThe GENMASK() index master->maxdevs - cmd->rx_len - 1 then becomes -1,\nwhich trips up UBSAN. This happens every time on boot on a Gigabyte/AMD\nserver:\n\n    UBSAN: shift-out-of-bounds in drivers/i3c/master/dw-i3c-master.c:905:12\n    shift exponent 64 is too large for 64-bit type 'long unsigned int'\n    CPU: 7 UID: 0 PID: 963 Comm: (udev-worker) Not tainted 7.0.11-200.fc44.x86_64 #1 PREEMPT(lazy)\n    Hardware name: Giga Computing E163-Z34-AAH1-000/MZ33-DC1-000, BIOS R32_F45 04/01/2026\n    Call Trace:\n     <TASK>\n     dump_stack_lvl+0x5d/0x80\n     ubsan_epilogue+0x5/0x2b\n     __ubsan_handle_shift_out_of_bounds.cold+0xd7/0x1ab\n     dw_i3c_master_daa.cold+0x1b/0x96 [dw_i3c_master]\n     i3c_master_do_daa_ext.part.0+0x3e/0xf0 [i3c]\n\nSkip the mask when no new device was assigned.","Type":"Description","Title":"i3c: dw: avoid shift-out-of-bounds when DAA assigns no devices"}]}}}