CVE-2026-90386 (GCVE-0-2026-90386)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:09 – Updated: 2026-09-17 16:09
VLAI
Title
i3c: dw: avoid shift-out-of-bounds when DAA assigns no devices
Summary
In the Linux kernel, the following vulnerability has been resolved: i3c: dw: avoid shift-out-of-bounds when DAA assigns no devices On an empty bus ENTDAA assigns nothing, so cmd->rx_len (the count of addresses left unassigned) equals master->maxdevs. The GENMASK() index master->maxdevs - cmd->rx_len - 1 then becomes -1, which trips up UBSAN. This happens every time on boot on a Gigabyte/AMD server: UBSAN: shift-out-of-bounds in drivers/i3c/master/dw-i3c-master.c:905:12 shift exponent 64 is too large for 64-bit type 'long unsigned int' CPU: 7 UID: 0 PID: 963 Comm: (udev-worker) Not tainted 7.0.11-200.fc44.x86_64 #1 PREEMPT(lazy) Hardware name: Giga Computing E163-Z34-AAH1-000/MZ33-DC1-000, BIOS R32_F45 04/01/2026 Call Trace: <TASK> dump_stack_lvl+0x5d/0x80 ubsan_epilogue+0x5/0x2b __ubsan_handle_shift_out_of_bounds.cold+0xd7/0x1ab dw_i3c_master_daa.cold+0x1b/0x96 [dw_i3c_master] i3c_master_do_daa_ext.part.0+0x3e/0xf0 [i3c] Skip the mask when no new device was assigned.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef , < 5650b013e6bfc14c8b30be727f4a715b01860a08 (git)
Affected: 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef , < 63110ccc434e10d9e9d2c7d82ebfa8a6f9cedd94 (git)
Affected: 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef , < 3a1c35739efb69e8ec2a868113a0471a01bb8f29 (git)
Affected: 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef , < 111f559e5b6461f5f6977275716e6c5d1eb7ea27 (git)
Affected: 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef , < 754533e6169d1f10bdef7a6ba9bd7740b524e1d4 (git)
Affected: 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef , < 9eaac0cb4ca94e2e32c53c156ae5b813ba7ef90c (git)
Affected: 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef , < 618dd640ded6b94bbdb79c798a901ec564797033 (git)
Affected: 1dd728f5d4d4b8b53196c1e0fcf86bbaaee39cef , < 038cf48b3170af26a70bf2dee4f8c3ac910f5176 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.0
Unaffected: 0 , < 5.0 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "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-\u003erx_len (the count\nof addresses left unassigned) equals master-\u003emaxdevs.\n\nThe GENMASK() index master-\u003emaxdevs - cmd-\u003erx_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 \u0027long unsigned int\u0027\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     \u003cTASK\u003e\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",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-90386",
      "date": "2026-09-27",
      "epss": "0.0022",
      "percentile": "0.1123"
    },
    "nvd": {
      "cve": {
        "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-rc1",
                    "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-\u003erx_len (the count\nof addresses left unassigned) equals master-\u003emaxdevs.\n\nThe GENMASK() index master-\u003emaxdevs - cmd-\u003erx_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 \u0027long unsigned int\u0027\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     \u003cTASK\u003e\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": "2026-09-17T17:17:37.993",
        "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"
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.