Vulnerability-Lookup

FKIE_CVE-2026-64512

Vulnerability from fkie_nvd - Published: 2026-07-25 10:17 - Updated: 2026-07-25 10:17

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: ACPI: CPPC: Suppress UBSAN warning caused by field misuse The definition of reg->access_width changes depending on the reg->space_id type. Type ACPI_ADR_SPACE_PLATFORM_COMM uses access_width to indicate the PCC region, which can result in a UBSAN if the value is greater than 4. For example: UBSAN: shift-out-of-bounds in drivers/acpi/cppc_acpi.c:1090:9 shift exponent 32 is too large for 32-bit type 'int' CPU: 61 UID: 0 PID: 1220 Comm: (udev-worker) Not tainted 7.0.10-201.fc44.aarch64 #1 PREEMPT(lazy) Hardware name: To be filled by O.E.M. Call trace: ...(trimming) ubsan_epilogue+0x10/0x48 __ubsan_handle_shift_out_of_bounds+0xdc/0x1e0 cpc_write+0x4d0/0x670 cppc_set_perf+0x18c/0x490 cppc_cpufreq_cpu_init+0x1c8/0x380 [cppc_cpufreq] ... (trimming) Lets fix this by validating the region type, as well as whether access_width has a value. Then since we are returning bit_width directly for ACPI_ADR_SPACE_PLATFORM_COMM, drop the code correcting the size.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1b1acf2dada0cc3931bb2cb9ff8832edfbee46a1
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2fb80e962029000959f651665baa4838cc92eb99
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/37f28bf8f14672dfa395994e41fd778a63f0bf5c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b54c4632946ae42f2b39ed38abd909bbf78cbcc2
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dc066bd13c860bb27d6ace511210e18b8064c1d9
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e904596ba6dd108534ffa15e3e46b2fe245145e2
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f29dc6132d4968e39d8fa575d1a12e2c718ce57b

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/cppc_acpi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b54c4632946ae42f2b39ed38abd909bbf78cbcc2",
              "status": "affected",
              "version": "4949affd5288b867cdf115f5b08d6166b2027f87",
              "versionType": "git"
            },
            {
              "lessThan": "e904596ba6dd108534ffa15e3e46b2fe245145e2",
              "status": "affected",
              "version": "01fc53be672acae37e611c80cc0b4f3939584de3",
              "versionType": "git"
            },
            {
              "lessThan": "2fb80e962029000959f651665baa4838cc92eb99",
              "status": "affected",
              "version": "1b890ae474d19800a6be1696df7fb4d9a41676e4",
              "versionType": "git"
            },
            {
              "lessThan": "37f28bf8f14672dfa395994e41fd778a63f0bf5c",
              "status": "affected",
              "version": "2f4a4d63a193be6fd530d180bb13c3592052904c",
              "versionType": "git"
            },
            {
              "lessThan": "f29dc6132d4968e39d8fa575d1a12e2c718ce57b",
              "status": "affected",
              "version": "2f4a4d63a193be6fd530d180bb13c3592052904c",
              "versionType": "git"
            },
            {
              "lessThan": "dc066bd13c860bb27d6ace511210e18b8064c1d9",
              "status": "affected",
              "version": "2f4a4d63a193be6fd530d180bb13c3592052904c",
              "versionType": "git"
            },
            {
              "lessThan": "1b1acf2dada0cc3931bb2cb9ff8832edfbee46a1",
              "status": "affected",
              "version": "2f4a4d63a193be6fd530d180bb13c3592052904c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6cb6b12b78dcd8867a3fdbb1b6d0ed1df2b208d1",
              "versionType": "git"
            },
            {
              "lessThan": "5.15.155",
              "status": "affected",
              "version": "5.15.154",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.178",
              "status": "affected",
              "version": "6.1.90",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.145",
              "status": "affected",
              "version": "6.6.30",
              "versionType": "semver"
            },
            {
              "lessThan": "6.9",
              "status": "affected",
              "version": "6.8.9",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/cppc_acpi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.155",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-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\nACPI: CPPC: Suppress UBSAN warning caused by field misuse\n\nThe definition of reg-\u003eaccess_width changes depending on the\nreg-\u003espace_id type.  Type ACPI_ADR_SPACE_PLATFORM_COMM uses\naccess_width to indicate the PCC region, which can result in a UBSAN\nif the value is greater than 4.\n\nFor example:\n\n UBSAN: shift-out-of-bounds in drivers/acpi/cppc_acpi.c:1090:9\n shift exponent 32 is too large for 32-bit type \u0027int\u0027\n CPU: 61 UID: 0 PID: 1220 Comm: (udev-worker) Not tainted 7.0.10-201.fc44.aarch64 #1 PREEMPT(lazy)\n Hardware name: To be filled by O.E.M.\n Call trace:\n  ...(trimming)\n  ubsan_epilogue+0x10/0x48\n  __ubsan_handle_shift_out_of_bounds+0xdc/0x1e0\n  cpc_write+0x4d0/0x670\n  cppc_set_perf+0x18c/0x490\n  cppc_cpufreq_cpu_init+0x1c8/0x380 [cppc_cpufreq]\n  ... (trimming)\n\nLets fix this by validating the region type, as well as whether\naccess_width has a value. Then since we are returning bit_width\ndirectly for ACPI_ADR_SPACE_PLATFORM_COMM, drop the code correcting\nthe size."
    }
  ],
  "id": "CVE-2026-64512",
  "lastModified": "2026-07-25T10:17:37.380",
  "metrics": {},
  "published": "2026-07-25T10:17:37.380",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1b1acf2dada0cc3931bb2cb9ff8832edfbee46a1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2fb80e962029000959f651665baa4838cc92eb99"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/37f28bf8f14672dfa395994e41fd778a63f0bf5c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b54c4632946ae42f2b39ed38abd909bbf78cbcc2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dc066bd13c860bb27d6ace511210e18b8064c1d9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e904596ba6dd108534ffa15e3e46b2fe245145e2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f29dc6132d4968e39d8fa575d1a12e2c718ce57b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-64512 (GCVE-0-2026-64512)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:52 – Updated: 2026-07-25 08:52

Title

ACPI: CPPC: Suppress UBSAN warning caused by field misuse

Summary

Severity

No CVSS data available.

Assigner

Linux

References

7 references

URL	Tags
https://git.kernel.org/stable/c/b54c4632946ae42f2…
https://git.kernel.org/stable/c/e904596ba6dd10853…
https://git.kernel.org/stable/c/2fb80e96202900095…
https://git.kernel.org/stable/c/37f28bf8f14672dfa…
https://git.kernel.org/stable/c/f29dc6132d4968e39…
https://git.kernel.org/stable/c/dc066bd13c860bb27…
https://git.kernel.org/stable/c/1b1acf2dada0cc393…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4949affd5288b867cdf115f5b08d6166b2027f87 , < b54c4632946ae42f2b39ed38abd909bbf78cbcc2 (git) Affected: 01fc53be672acae37e611c80cc0b4f3939584de3 , < e904596ba6dd108534ffa15e3e46b2fe245145e2 (git) Affected: 1b890ae474d19800a6be1696df7fb4d9a41676e4 , < 2fb80e962029000959f651665baa4838cc92eb99 (git) Affected: 2f4a4d63a193be6fd530d180bb13c3592052904c , < 37f28bf8f14672dfa395994e41fd778a63f0bf5c (git) Affected: 2f4a4d63a193be6fd530d180bb13c3592052904c , < f29dc6132d4968e39d8fa575d1a12e2c718ce57b (git) Affected: 2f4a4d63a193be6fd530d180bb13c3592052904c , < dc066bd13c860bb27d6ace511210e18b8064c1d9 (git) Affected: 2f4a4d63a193be6fd530d180bb13c3592052904c , < 1b1acf2dada0cc3931bb2cb9ff8832edfbee46a1 (git) Affected: 6cb6b12b78dcd8867a3fdbb1b6d0ed1df2b208d1 (git) Affected: 5.15.154 , < 5.15.155 (semver) Affected: 6.1.90 , < 6.1.178 (semver) Affected: 6.6.30 , < 6.6.145 (semver) Affected: 6.8.9 , < 6.9 (semver)
Linux	Linux	Affected: 6.9 Unaffected: 0 , < 6.9 (semver) Unaffected: 5.15.155 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/cppc_acpi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b54c4632946ae42f2b39ed38abd909bbf78cbcc2",
              "status": "affected",
              "version": "4949affd5288b867cdf115f5b08d6166b2027f87",
              "versionType": "git"
            },
            {
              "lessThan": "e904596ba6dd108534ffa15e3e46b2fe245145e2",
              "status": "affected",
              "version": "01fc53be672acae37e611c80cc0b4f3939584de3",
              "versionType": "git"
            },
            {
              "lessThan": "2fb80e962029000959f651665baa4838cc92eb99",
              "status": "affected",
              "version": "1b890ae474d19800a6be1696df7fb4d9a41676e4",
              "versionType": "git"
            },
            {
              "lessThan": "37f28bf8f14672dfa395994e41fd778a63f0bf5c",
              "status": "affected",
              "version": "2f4a4d63a193be6fd530d180bb13c3592052904c",
              "versionType": "git"
            },
            {
              "lessThan": "f29dc6132d4968e39d8fa575d1a12e2c718ce57b",
              "status": "affected",
              "version": "2f4a4d63a193be6fd530d180bb13c3592052904c",
              "versionType": "git"
            },
            {
              "lessThan": "dc066bd13c860bb27d6ace511210e18b8064c1d9",
              "status": "affected",
              "version": "2f4a4d63a193be6fd530d180bb13c3592052904c",
              "versionType": "git"
            },
            {
              "lessThan": "1b1acf2dada0cc3931bb2cb9ff8832edfbee46a1",
              "status": "affected",
              "version": "2f4a4d63a193be6fd530d180bb13c3592052904c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6cb6b12b78dcd8867a3fdbb1b6d0ed1df2b208d1",
              "versionType": "git"
            },
            {
              "lessThan": "5.15.155",
              "status": "affected",
              "version": "5.15.154",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.178",
              "status": "affected",
              "version": "6.1.90",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.145",
              "status": "affected",
              "version": "6.6.30",
              "versionType": "semver"
            },
            {
              "lessThan": "6.9",
              "status": "affected",
              "version": "6.8.9",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/cppc_acpi.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.9"
            },
            {
              "lessThan": "6.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.155",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.155",
                  "versionStartIncluding": "5.15.154",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "6.1.90",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "6.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.96",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.39",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.4",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2-rc1",
                  "versionStartIncluding": "6.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.8.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: CPPC: Suppress UBSAN warning caused by field misuse\n\nThe definition of reg-\u003eaccess_width changes depending on the\nreg-\u003espace_id type.  Type ACPI_ADR_SPACE_PLATFORM_COMM uses\naccess_width to indicate the PCC region, which can result in a UBSAN\nif the value is greater than 4.\n\nFor example:\n\n UBSAN: shift-out-of-bounds in drivers/acpi/cppc_acpi.c:1090:9\n shift exponent 32 is too large for 32-bit type \u0027int\u0027\n CPU: 61 UID: 0 PID: 1220 Comm: (udev-worker) Not tainted 7.0.10-201.fc44.aarch64 #1 PREEMPT(lazy)\n Hardware name: To be filled by O.E.M.\n Call trace:\n  ...(trimming)\n  ubsan_epilogue+0x10/0x48\n  __ubsan_handle_shift_out_of_bounds+0xdc/0x1e0\n  cpc_write+0x4d0/0x670\n  cppc_set_perf+0x18c/0x490\n  cppc_cpufreq_cpu_init+0x1c8/0x380 [cppc_cpufreq]\n  ... (trimming)\n\nLets fix this by validating the region type, as well as whether\naccess_width has a value. Then since we are returning bit_width\ndirectly for ACPI_ADR_SPACE_PLATFORM_COMM, drop the code correcting\nthe size."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:52:04.423Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b54c4632946ae42f2b39ed38abd909bbf78cbcc2"
        },
        {
          "url": "https://git.kernel.org/stable/c/e904596ba6dd108534ffa15e3e46b2fe245145e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/2fb80e962029000959f651665baa4838cc92eb99"
        },
        {
          "url": "https://git.kernel.org/stable/c/37f28bf8f14672dfa395994e41fd778a63f0bf5c"
        },
        {
          "url": "https://git.kernel.org/stable/c/f29dc6132d4968e39d8fa575d1a12e2c718ce57b"
        },
        {
          "url": "https://git.kernel.org/stable/c/dc066bd13c860bb27d6ace511210e18b8064c1d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b1acf2dada0cc3931bb2cb9ff8832edfbee46a1"
        }
      ],
      "title": "ACPI: CPPC: Suppress UBSAN warning caused by field misuse",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64512",
    "datePublished": "2026-07-25T08:52:04.423Z",
    "dateReserved": "2026-07-19T15:36:31.793Z",
    "dateUpdated": "2026-07-25T08:52:04.423Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

FKIE_CVE-2026-64512

CVE-2026-64512 (GCVE-0-2026-64512)

Tags

Sightings

Nomenclature