CVE-2026-98605 (GCVE-0-2026-98605)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:19 – Updated: 2026-10-19 09:22
VLAI
Title
drm/bridge: samsung-dsim: fix TE GPIO lifetime for host attach
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]
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e7447128ca4a250374d6721ee98e3e3cf99551a6 , < 77a43e00c57486a5212ef22d4665cafad62a5d4b (git)
Affected: e7447128ca4a250374d6721ee98e3e3cf99551a6 , < 5759bbef951c39d264ac0f47daa4137d01403aea (git)
Affected: e7447128ca4a250374d6721ee98e3e3cf99551a6 , < ebffd70e4877bb7554974cf975a27872f2bb225f (git)
Affected: e7447128ca4a250374d6721ee98e3e3cf99551a6 , < 9b796251c3cca45a33a5c859c6818c58aa982277 (git)
Affected: e7447128ca4a250374d6721ee98e3e3cf99551a6 , < ada667890773e033d2f40dc94176e3beb930b516 (git)
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Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.55 , ≤ 6.18.* (semver)
Unaffected: 7.2.9 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/bridge/samsung-dsim.c"
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          "vendor": "Linux",
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              "version": "7.3",
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      "cpeApplicability": [
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          "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]"
        }
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        "shortName": "Linux"
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    "datePublished": "2026-10-18T15:19:18.294Z",
    "dateReserved": "2026-09-25T10:25:14.359Z",
    "dateUpdated": "2026-10-19T09:22:32.426Z",
    "state": "PUBLISHED"
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      "product_status:known_not_affected": "1",
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      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98605.json",
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            "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]"
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}



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