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CVE-2026-89802

drm/nouveau/uvmm: fix NULL deref unwinding an OP_MAP_SPARSE op

Description

In the Linux kernel, the following vulnerability has been resolved: drm/nouveau/uvmm: fix NULL deref unwinding an OP_MAP_SPARSE op Each bind_job_op is zeroed by kzalloc_obj() in bind_job_op_from_uop(), and the OP_MAP_SPARSE case in nouveau_uvmm_bind_job_submit() only creates a region, so op->ops stays NULL for a successfully processed sparse map. If a later op in the same job fails, the reverse unwind loop revisits that op and calls drm_gpuva_ops_free(&uvmm->base, op->ops) unconditionally. drm_gpuva_ops_free() dereferences its argument right away (list_for_each_entry_safe on &ops->list), so a NULL op->ops oopses. The path is reachable by any render-node fd holder, since NOUVEAU_VM_BIND is DRM_RENDER_ALLOW. Guard the free with IS_ERR_OR_NULL(), as nouveau_uvmm_bind_job_cleanup() already does for the identical free.

Timeline

  1. ID reserved

    By Linux

  2. · 5 days later

    Published

  3. · 35 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.

EPSS (exploitation in 30 days)
0.20% · top 90% of all CVEs (11 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

  • Linux · Linux

    • affected b88baab828713ce0b49b185444b2ee83bed373a8 – < d8ec34618e71018fd7a3f73c57c6b92d71a6c7c3
    • affected b88baab828713ce0b49b185444b2ee83bed373a8 – < 3bf493cf7ed0c2b3df728977a257e0d99b4db1c6
    • affected b88baab828713ce0b49b185444b2ee83bed373a8 – < b7dc03e09313d22a6d230b759de3b05d504c008f
    • affected b88baab828713ce0b49b185444b2ee83bed373a8 – < 3857238de6bce6c1573e8cb86c37b067e5208f05
    • affected b88baab828713ce0b49b185444b2ee83bed373a8 – < 412a6ceb56d501ef2f8202e26ab4b5d4dfbca566
  • Linux · Linux

    • affected 6.6
    • unaffected < 6.6
    • unaffected 6.6.160 – ≤ 6.6.*
    • unaffected 6.12.110 – ≤ 6.12.*
    • unaffected 6.18.51 – ≤ 6.18.*
    • unaffected 7.2.5 – ≤ 7.2.*
    • unaffected 7.3 – ≤ *

References

References5

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .