CVE-2026-98605 (GCVE-0-2026-98605)
Vulnerability from cvelistv5
Published
2026-10-18 15:19
Modified
2026-10-19 09:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/bridge: samsung-dsim: fix TE GPIO lifetime for host attach When the Exynos DSI driver was generalized into samsung-dsim, the TE GPIO acquisition was switched from gpiod_get_optional() to devm_gpiod_get_optional() while keeping the matching gpiod_put() calls. That combination is wrong for a managed descriptor. However, dropping the puts and keeping the managed get is also wrong: samsung_dsim_register_te_irq() runs from the DSI host attach callback, and host detach/reattach can happen without destroying the device that owns the managed action. A second attach would then request the GPIO again without having released it. Switch back to a non-managed gpiod_get_optional() and keep the explicit gpiod_put() on the request_irq() error path and in samsung_dsim_unregister_te_irq(). [Luca: remove unnecessary comment]
References
Impacted products
Vendor Product Version
Linux Linux Version: e7447128ca4a250374d6721ee98e3e3cf99551a6
Version: e7447128ca4a250374d6721ee98e3e3cf99551a6
Version: e7447128ca4a250374d6721ee98e3e3cf99551a6
Version: e7447128ca4a250374d6721ee98e3e3cf99551a6
Version: e7447128ca4a250374d6721ee98e3e3cf99551a6
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/bridge/samsung-dsim.c"
          ],
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        },
        {
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          "product": "Linux",
          "programFiles": [
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          ],
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          "vendor": "Linux",
          "versions": [
            {
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              "version": "6.4"
            },
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              "version": "0",
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              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
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                },
                {
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                },
                {
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/bridge: samsung-dsim: fix TE GPIO lifetime for host attach\n\nWhen the Exynos DSI driver was generalized into samsung-dsim, the TE\nGPIO acquisition was switched from gpiod_get_optional() to\ndevm_gpiod_get_optional() while keeping the matching gpiod_put() calls.\nThat combination is wrong for a managed descriptor.\n\nHowever, dropping the puts and keeping the managed get is also wrong:\nsamsung_dsim_register_te_irq() runs from the DSI host attach callback,\nand host detach/reattach can happen without destroying the device that\nowns the managed action. A second attach would then request the GPIO\nagain without having released it.\n\nSwitch back to a non-managed gpiod_get_optional() and keep the explicit\ngpiod_put() on the request_irq() error path and in\nsamsung_dsim_unregister_te_irq().\n\n[Luca: remove unnecessary comment]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:22:32.426Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/77a43e00c57486a5212ef22d4665cafad62a5d4b"
        },
        {
          "url": "https://git.kernel.org/stable/c/5759bbef951c39d264ac0f47daa4137d01403aea"
        },
        {
          "url": "https://git.kernel.org/stable/c/ebffd70e4877bb7554974cf975a27872f2bb225f"
        },
        {
          "url": "https://git.kernel.org/stable/c/9b796251c3cca45a33a5c859c6818c58aa982277"
        },
        {
          "url": "https://git.kernel.org/stable/c/ada667890773e033d2f40dc94176e3beb930b516"
        }
      ],
      "title": "drm/bridge: samsung-dsim: fix TE GPIO lifetime for host attach",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98605",
    "datePublished": "2026-10-18T15:19:18.294Z",
    "dateReserved": "2026-09-25T10:25:14.359Z",
    "dateUpdated": "2026-10-19T09:22:32.426Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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