CVE-2022-50454 (GCVE-0-2022-50454)
Vulnerability from cvelistv5
Published
2025-10-01 11:45
Modified
2025-10-01 11:45
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table() nouveau_bo_init() is backed by ttm_bo_init() and ferries its return code back to the caller. On failures, ttm will call nouveau_bo_del_ttm() and free the memory.Thus, when nouveau_bo_init() returns an error, the gem object has already been released. Then the call to nouveau_bo_ref() will use the freed "nvbo->bo" and lead to a use-after-free bug. We should delete the call to nouveau_bo_ref() to avoid the use-after-free.
References
Impacted products
Vendor Product Version
Linux Linux Version: 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5
Version: 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5
Version: 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5
Version: 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5
Version: 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5
Version: 019cbd4a4feb3aa3a917d78e7110e3011bbff6d5
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          "programFiles": [
            "drivers/gpu/drm/nouveau/nouveau_prime.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table()\n\nnouveau_bo_init() is backed by ttm_bo_init() and ferries its return code\nback to the caller. On failures, ttm will call nouveau_bo_del_ttm() and\nfree the memory.Thus, when nouveau_bo_init() returns an error, the gem\nobject has already been released. Then the call to nouveau_bo_ref() will\nuse the freed \"nvbo-\u003ebo\" and lead to a use-after-free bug.\n\nWe should delete the call to nouveau_bo_ref() to avoid the use-after-free."
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        "dateUpdated": "2025-10-01T11:45:27.337Z",
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          "url": "https://git.kernel.org/stable/c/540dfd188ea2940582841c1c220bd035a7db0e51"
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      "title": "drm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table()",
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    "cveId": "CVE-2022-50454",
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    "dateReserved": "2025-10-01T11:38:45.640Z",
    "dateUpdated": "2025-10-01T11:45:27.337Z",
    "state": "PUBLISHED"
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  }
}


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