CVE-2025-68735 (GCVE-0-2025-68735)

Vulnerability from cvelistv5 – Published: 2025-12-24 12:09 – Updated: 2026-08-05 12:11
VLAI
Title
drm/panthor: Prevent potential UAF in group creation
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/panthor: Prevent potential UAF in group creation This commit prevents the possibility of a use after free issue in the GROUP_CREATE ioctl function, which arose as pointer to the group is accessed in that ioctl function after storing it in the Xarray. A malicious userspace can second guess the handle of a group and try to call GROUP_DESTROY ioctl from another thread around the same time as GROUP_CREATE ioctl. To prevent the use after free exploit, this commit uses a mark on an entry of group pool Xarray which is added just before returning from the GROUP_CREATE ioctl function. The mark is checked for all ioctls that specify the group handle and so userspace won't be abe to delete a group that isn't marked yet. v2: Add R-bs and fixes tags
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: de85488138247d034eb3241840424a54d660926b , < deb8b2491f6b9882ae02d7dc2651c7bf4f3b7e05 (git)
Affected: de85488138247d034eb3241840424a54d660926b , < c646ebff3fa571e7ea974235286fb9ed3edc260c (git)
Affected: de85488138247d034eb3241840424a54d660926b , < eec7e23d848d2194dd8791fcd0f4a54d4378eecd (git)
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Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/panthor/panthor_sched.c"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: Prevent potential UAF in group creation\n\nThis commit prevents the possibility of a use after free issue in the\nGROUP_CREATE ioctl function, which arose as pointer to the group is\naccessed in that ioctl function after storing it in the Xarray.\nA malicious userspace can second guess the handle of a group and try\nto call GROUP_DESTROY ioctl from another thread around the same time\nas GROUP_CREATE ioctl.\n\nTo prevent the use after free exploit, this commit uses a mark on an\nentry of group pool Xarray which is added just before returning from\nthe GROUP_CREATE ioctl function. The mark is checked for all ioctls\nthat specify the group handle and so userspace won\u0027t be abe to delete\na group that isn\u0027t marked yet.\n\nv2: Add R-bs and fixes tags"
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            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The flaw is reached through concurrent GROUP_CREATE and GROUP_DESTROY ioctls on a Panthor DRM device node, making it locally exploitable.\nAC:L - The attacker controls both racing threads, handles are predictably allocated from a 1\u2013128 range, and attacker-controlled queue allocations widen the repeatable race window.\nPR:L - Both ioctls have DRM_RENDER_ALLOW, and low or medium group priorities require no capability; a basic unprivileged process with render-node access suffices.\nUI:N - The attacker directly issues the concurrent ioctls without requiring any action from another user.\nS:U - The corruption affects the host kernel within the same security authority and represents standard local privilege escalation, not a VM or IOMMU-boundary escape.\nC:H - The group can be freed and reclaimed while creation continues dereferencing stale pointers, providing exploitable heap corruption that can enable arbitrary kernel-memory disclosure.\nI:H - Post-free operations write queue pointers, counters, list links, locks, and task metadata into reclaimed memory, enabling arbitrary corruption and potential control-flow hijacking.\nA:H - Concurrent cleanup can free the group and associated resources while they remain in use, allowing repeatable kernel crashes, oopses, or panics."
            }
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      "title": "drm/panthor: Prevent potential UAF in group creation",
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    "datePublished": "2025-12-24T12:09:34.364Z",
    "dateReserved": "2025-12-24T10:30:51.028Z",
    "dateUpdated": "2026-08-05T12:11:11.441Z",
    "state": "PUBLISHED"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: Prevent potential UAF in group creation\n\nThis commit prevents the possibility of a use after free issue in the\nGROUP_CREATE ioctl function, which arose as pointer to the group is\naccessed in that ioctl function after storing it in the Xarray.\nA malicious userspace can second guess the handle of a group and try\nto call GROUP_DESTROY ioctl from another thread around the same time\nas GROUP_CREATE ioctl.\n\nTo prevent the use after free exploit, this commit uses a mark on an\nentry of group pool Xarray which is added just before returning from\nthe GROUP_CREATE ioctl function. The mark is checked for all ioctls\nthat specify the group handle and so userspace won\u0027t be abe to delete\na group that isn\u0027t marked yet.\n\nv2: Add R-bs and fixes tags"
          }
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        "lastModified": "2026-07-30T06:24:41.540",
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                "integrityImpact": "HIGH",
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      "cve": "CVE-2025-68735",
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      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Kernel: Privilege escalation via use-after-free in drm/panthor",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68735.json",
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      "id": "CVE-2025-68735",
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      "product_status:first_fixed": "2",
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      "product_status:recommended": "262",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-68735",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-68735.json",
      "version": "30"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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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.
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  • 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.



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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.