CVE-2025-22100 (GCVE-0-2025-22100)

Vulnerability from cvelistv5 – Published: 2025-04-16 14:12 – Updated: 2026-08-05 11:56
VLAI
Title
drm/panthor: Fix race condition when gathering fdinfo group samples
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/panthor: Fix race condition when gathering fdinfo group samples Commit e16635d88fa0 ("drm/panthor: add DRM fdinfo support") failed to protect access to groups with an xarray lock, which could lead to use-after-free errors.
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: e16635d88fa07ba5801aa9e57ad7fe3c053234e4 , < 6d98c83ad67e7bd86a47494fd6c3863e7bb26db9 (git)
Affected: e16635d88fa07ba5801aa9e57ad7fe3c053234e4 , < e9d45f42a64a400adba59ee83d03e6db662530b4 (git)
Affected: e16635d88fa07ba5801aa9e57ad7fe3c053234e4 , < 0590c94c3596d6c1a3d549ae611366f2ad4e1d8d (git)
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Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 6.13.11 , ≤ 6.13.* (semver)
Unaffected: 6.14.2 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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              "value": "AV:L - Exploitation requires local access to the panthor DRM render node (/dev/dri/renderD*) for the GROUP_CREATE/GROUP_DESTROY ioctls and a read of /proc/\u003cpid\u003e/fdinfo for the same fd. There is no network-reachable path into this GPU driver.\nAC:L - The attacker controls both sides of the race, spinning one thread on read() of its own fdinfo while another thread loops GROUP_CREATE/GROUP_DESTROY, so the window can be hit repeatedly and at will. Groups with no submitted jobs are freed synchronously on destroy, making the window wide and reproducible.\nPR:L - Both the GROUP_CREATE and GROUP_DESTROY ioctls are DRM_RENDER_ALLOW, requiring no DRM master or authentication, and any process can read its own /proc/self/fdinfo. On Android, Chromebooks and embedded Mali-CSF systems ordinary unprivileged apps hold render-node access.\nUI:N - The attacking process performs every step itself \u2014 opening the render node, creating and destroying the group, and reading its own fdinfo. No victim action is involved.\nS:U - The use-after-free corrupts kernel slab memory within the same security authority; there is no VM, IOMMU or sandbox boundary crossed.\nC:H - The loop reads two u64 fields out of the freed panthor_group and the values are printed straight back to userspace as drm-cycles-panthor/drm-engine-panthor, leaking reallocated heap contents including potential kernel pointers, and a UAF generally yields an arbitrary-read primitive via heap grooming.\nI:H - The loop body writes into the freed object \u2014 mutex_lock/unlock on group-\u003efdinfo.lock plus zeroing of the data fields \u2014 corrupting whatever structure reuses the slab, which is a classic path to control-flow hijack via heap spraying.\nA:H - Dereferencing and locking a freed mutex reliably produces a kernel oops or panic, and the corrupted lock state can additionally hang tasks waiting on it."
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}



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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.

Sightings

Author Source Type Date Other

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.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.



Related by attack behaviour

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.