CVE-2026-90386

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90386", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.809Z", "datePublished": "2026-09-17T16:09:21.842Z", "dateUpdated": "2026-10-19T09:02:48.790Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:02:48.790Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/i3c/master/dw-i3c-master.c"], "versions": [{"version": "1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef", "lessThan": "5650b013e6bfc14c8b30be727f4a715b01860a08", "status": "affected", "versionType": "git"}, {"version": "1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef", "lessThan": "63110ccc434e10d9e9d2c7d82ebfa8a6f9cedd94", "status": "affected", "versionType": "git"}, {"version": "1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef", "lessThan": "3a1c35739efb69e8ec2a868113a0471a01bb8f29", "status": "affected", "versionType": "git"}, {"version": "1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef", "lessThan": "111f559e5b6461f5f6977275716e6c5d1eb7ea27", "status": "affected", "versionType": "git"}, {"version": "1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef", "lessThan": "754533e6169d1f10bdef7a6ba9bd7740b524e1d4", "status": "affected", "versionType": "git"}, {"version": "1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef", "lessThan": "9eaac0cb4ca94e2e32c53c156ae5b813ba7ef90c", "status": "affected", "versionType": "git"}, {"version": "1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef", "lessThan": "618dd640ded6b94bbdb79c798a901ec564797033", "status": "affected", "versionType": "git"}, {"version": "1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef", "lessThan": "038cf48b3170af26a70bf2dee4f8c3ac910f5176", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/i3c/master/dw-i3c-master.c"], "versions": [{"version": "5.0", "status": "affected"}, {"version": "0", "lessThan": "5.0", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.0", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.3"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-90386", "lastModified": "2026-10-19T09:19:32.597", "metrics": {}, "published": "2026-09-17T17:17:37.993", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/038cf48b3170af26a70bf2dee4f8c3ac910f5176"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/111f559e5b6461f5f6977275716e6c5d1eb7ea27"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3a1c35739efb69e8ec2a868113a0471a01bb8f29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5650b013e6bfc14c8b30be727f4a715b01860a08"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/618dd640ded6b94bbdb79c798a901ec564797033"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/63110ccc434e10d9e9d2c7d82ebfa8a6f9cedd94"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/754533e6169d1f10bdef7a6ba9bd7740b524e1d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9eaac0cb4ca94e2e32c53c156ae5b813ba7ef90c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef,5650b013e6bfc14c8b30be727f4a715b01860a08)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef,63110ccc434e10d9e9d2c7d82ebfa8a6f9cedd94)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef,3a1c35739efb69e8ec2a868113a0471a01bb8f29)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef,111f559e5b6461f5f6977275716e6c5d1eb7ea27)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef,754533e6169d1f10bdef7a6ba9bd7740b524e1d4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef,9eaac0cb4ca94e2e32c53c156ae5b813ba7ef90c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef,618dd640ded6b94bbdb79c798a901ec564797033)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef,038cf48b3170af26a70bf2dee4f8c3ac910f5176)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.270,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.221,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.188,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.157,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.110,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.52,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.6,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-19T05:15:10.871388+00:00", "updated": "2026-09-19T07:15:13.796098+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-68", "CWE-125"]}