FKIE_CVE-2026-72149

Vulnerability from fkie_nvd - Published: 2026-08-15 06:21 - Updated: 2026-10-16 19:17
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: dmaengine: tegra: Fix burst size calculation Currently, the Tegra GPC DMA hardware requires the transfer length to be a multiple of the max burst size configured for the channel. When a client requests a transfer where the length is not evenly divisible by the configured max burst size, the DMA hangs with partial burst at the end. Fix this by reducing the burst size to the largest power-of-2 value that evenly divides the transfer length. For example, a 40-byte transfer with a 16-byte max burst will now use an 8-byte burst (40 / 8 = 5 complete bursts) instead of causing a hang. This issue was observed with the PL011 UART driver where TX DMA transfers of arbitrary lengths were stuck.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4651df83b6c796daead3447e8fd874322918ee4f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6e37e9e230c7e848bd8e8cd4db15bb18bcf11ad1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/735951baa311c66353405dcac39375dd66441db0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7926c1e4be86379945fb5f168888ac4d2aaf6c91
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8f0f5de1091119679d87f60dfb1acbff4b2a0ed3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a3b76b54e06d73166af4d1a284a0e0711889060c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/tegra186-gpc-dma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "735951baa311c66353405dcac39375dd66441db0",
              "status": "affected",
              "version": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
              "versionType": "git"
            },
            {
              "lessThan": "8f0f5de1091119679d87f60dfb1acbff4b2a0ed3",
              "status": "affected",
              "version": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
              "versionType": "git"
            },
            {
              "lessThan": "a3b76b54e06d73166af4d1a284a0e0711889060c",
              "status": "affected",
              "version": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
              "versionType": "git"
            },
            {
              "lessThan": "7926c1e4be86379945fb5f168888ac4d2aaf6c91",
              "status": "affected",
              "version": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
              "versionType": "git"
            },
            {
              "lessThan": "6e37e9e230c7e848bd8e8cd4db15bb18bcf11ad1",
              "status": "affected",
              "version": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
              "versionType": "git"
            },
            {
              "lessThan": "4651df83b6c796daead3447e8fd874322918ee4f",
              "status": "affected",
              "version": "ee17028009d49fffed8cc963455d33b1fd3f1d08",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/tegra186-gpc-dma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "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": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "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\ndmaengine: tegra: Fix burst size calculation\n\nCurrently, the Tegra GPC DMA hardware requires the transfer length to\nbe a multiple of the max burst size configured for the channel. When a\nclient requests a transfer where the length is not evenly divisible by\nthe configured max burst size, the DMA hangs with partial burst at\nthe end.\n\nFix this by reducing the burst size to the largest power-of-2 value\nthat evenly divides the transfer length. For example, a 40-byte\ntransfer with a 16-byte max burst will now use an 8-byte burst\n(40 / 8 = 5 complete bursts) instead of causing a hang.\n\nThis issue was observed with the PL011 UART driver where TX DMA\ntransfers of arbitrary lengths were stuck."
    }
  ],
  "id": "CVE-2026-72149",
  "lastModified": "2026-10-16T19:17:11.910",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-72149",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-16T18:42:54.687162Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-15T06:21:32.610",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4651df83b6c796daead3447e8fd874322918ee4f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6e37e9e230c7e848bd8e8cd4db15bb18bcf11ad1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/735951baa311c66353405dcac39375dd66441db0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7926c1e4be86379945fb5f168888ac4d2aaf6c91"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8f0f5de1091119679d87f60dfb1acbff4b2a0ed3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a3b76b54e06d73166af4d1a284a0e0711889060c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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