CVE-2025-68746 (GCVE-0-2025-68746)
Vulnerability from cvelistv5
Published
2025-12-24 12:09
Modified
2026-08-05 12:11
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: spi: tegra210-quad: Fix timeout handling When the CPU that the QSPI interrupt handler runs on (typically CPU 0) is excessively busy, it can lead to rare cases of the IRQ thread not running before the transfer timeout is reached. While handling the timeouts, any pending transfers are cleaned up and the message that they correspond to is marked as failed, which leaves the curr_xfer field pointing at stale memory. To avoid this, clear curr_xfer to NULL upon timeout and check for this condition when the IRQ thread is finally run. While at it, also make sure to clear interrupts on failure so that new interrupts can be run. A better, more involved, fix would move the interrupt clearing into a hard IRQ handler. Ideally we would also want to signal that the IRQ thread no longer needs to be run after the timeout is hit to avoid the extra check for a valid transfer.
References
Impacted products
Vendor Product Version
Linux Linux Version: 921fc1838fb036f690b8ba52e6a6d3644b475cbb
Version: 921fc1838fb036f690b8ba52e6a6d3644b475cbb
Version: 921fc1838fb036f690b8ba52e6a6d3644b475cbb
Version: 921fc1838fb036f690b8ba52e6a6d3644b475cbb
Version: 921fc1838fb036f690b8ba52e6a6d3644b475cbb
Version: 921fc1838fb036f690b8ba52e6a6d3644b475cbb
Version: 921fc1838fb036f690b8ba52e6a6d3644b475cbb
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/spi/spi-tegra210-quad.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/spi/spi-tegra210-quad.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.160",
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            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.120",
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            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.63",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.198",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.160",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
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                {
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                {
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                  "versionEndExcluding": "6.19",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: tegra210-quad: Fix timeout handling\n\nWhen the CPU that the QSPI interrupt handler runs on (typically CPU 0)\nis excessively busy, it can lead to rare cases of the IRQ thread not\nrunning before the transfer timeout is reached.\n\nWhile handling the timeouts, any pending transfers are cleaned up and\nthe message that they correspond to is marked as failed, which leaves\nthe curr_xfer field pointing at stale memory.\n\nTo avoid this, clear curr_xfer to NULL upon timeout and check for this\ncondition when the IRQ thread is finally run.\n\nWhile at it, also make sure to clear interrupts on failure so that new\ninterrupts can be run.\n\nA better, more involved, fix would move the interrupt clearing into a\nhard IRQ handler. Ideally we would also want to signal that the IRQ\nthread no longer needs to be run after the timeout is hit to avoid the\nextra check for a valid transfer."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - A local process can reach the vulnerable controller through SPI/MTD device I/O or flash-backed filesystem access; the controller is not inherently network-facing.\nAC:L - The attacker can repeatedly initiate transfers while generating CPU or interrupt contention to delay the threaded IRQ beyond the fixed timeout. The race is therefore attacker-influenceable and repeatable.\nPR:L - An ordinary user with access to an exposed spidev/MTD node or mounted SPI-NOR storage can initiate transfers, and the relevant read and SPI ioctl paths impose no capability check.\nUI:N - Exploitation requires no action by another user after the attacker initiates the transfer and scheduling race.\nS:U - The stale-pointer corruption occurs within the host kernel and does not inherently cross a VM, IOMMU, or other security authority boundary.\nC:H - The stale spi_transfer exposes freed buffer pointers and DMA addresses, providing potentially attacker-shaped kernel-memory reads and information disclosure.\nI:H - The PIO and DMA receive paths write through stale buffer pointers and can remap reclaimed transfer fields, making arbitrary kernel-memory corruption and control-flow hijacking defensible.\nA:H - Dereferencing stale transfer or buffer memory can cause a kernel fault, panic, or controller failure, and the condition can be triggered repeatedly."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:11:15.698Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/88db8bb7ed1bb474618acdf05ebd4f0758d244e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/83309dd551cfd60a5a1a98d9cab19f435b44d46d"
        },
        {
          "url": "https://git.kernel.org/stable/c/c934e40246da2c5726d14e94719c514e30840df8"
        },
        {
          "url": "https://git.kernel.org/stable/c/551060efb156c50fe33799038ba8145418cfdeef"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb0c58be84f907285af45657c1d4847b960a12bf"
        },
        {
          "url": "https://git.kernel.org/stable/c/01bbf25c767219b14c3235bfa85906b8d2cb8fbc"
        },
        {
          "url": "https://git.kernel.org/stable/c/b4e002d8a7cee3b1d70efad0e222567f92a73000"
        }
      ],
      "title": "spi: tegra210-quad: Fix timeout handling",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68746",
    "datePublished": "2025-12-24T12:09:42.213Z",
    "dateReserved": "2025-12-24T10:30:51.031Z",
    "dateUpdated": "2026-08-05T12:11:15.698Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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