Answer in brief
CVE-2026-89801 records a Unknown severity vulnerability in drm/nouveau/uvmm: fix premature region free on failed OP_UNMAP_SPARSE. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b88baab828713ce0b49b185444b2ee83bed373a8 <ba42d8a1c2c7629c61914df11a7d63ac77449ffb || >=b88baab828713ce0b49b185444b2ee83bed373a8 <88114e3a96582882e63b2f73aa7a5a9cf0d5073c || >=b88baab828713ce0b49b185444b2ee83bed373a8 <24c25b182d17d1bdfde0088c96bdf6f93e8f46bc || >=b88baab828713ce0b49b185444b2ee83bed373a8 <4083d24c2636fde7b18076115af52820d203bc57 || >=b88baab828713ce0b49b185444b2ee83bed373a8 <ccf930812f23b8259ef64fd3394d53b093e4651a | ba42d8a1c2c7629c61914df11a7d63ac77449ffb, 88114e3a96582882e63b2f73aa7a5a9cf0d5073c, 24c25b182d17d1bdfde0088c96bdf6f93e8f46bc, 4083d24c2636fde7b18076115af52820d203bc57, ccf930812f23b8259ef64fd3394d53b093e4651a |
| Linux/Linuxgeneric | 6.6 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau/uvmm: fix premature region free on failed OP_UNMAP_SPARSE In nouveau_uvmm_bind_job_submit()'s OP_UNMAP_SPARSE arm, op->reg is set from nouveau_uvma_region_find(), which only looks the region up and takes no reference; a region's sole reference is its membership in uvmm->region_mt. Two failure paths leave op->reg set: the -ENOENT check when the region is busy, and the drm_gpuvm_sm_unmap_ops_create() failure. The sibling nouveau_uvmm_sm_unmap_prepare() failure just below clears op->reg; these two do not. unwind_continue steps back one op, so the failing op is skipped by the unwind loop and its op->reg stays set. nouveau_uvmm_bind_job_cleanup() then enters its if (op->reg) branch and calls nouveau_uvma_region_remove() and nouveau_uvma_region_put() on it, dropping the tree's sole reference and freeing a region this job never created. The comment above the cleanup loop documents the broken invariant: op->reg must be NULL on submit failure. This frees a live region on an unrelated failure, reachable single-job when drm_gpuvm_sm_unmap_ops_create() returns -ENOMEM; if another job owns the same region, its cleanup then removes and puts the freed region, a use-after-free. Clear op->reg on both failure paths.
Quoted source text, attributed separately from HOL analysis.