{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50454", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-01T11:38:45.640Z", "datePublished": "2025-10-01T11:45:27.337Z", "dateUpdated": "2026-08-05T08:58:51.159Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:58:51.159Z" }, "descriptions": [ { "lang": "en", "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->bo\" and lead to a use-after-free bug.\n\nWe should delete the call to nouveau_bo_ref() to avoid the use-after-free." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The UAF is reached only via local DRM_IOCTL_PRIME_FD_TO_HANDLE on a Nouveau render/primary node (drm_gem_prime_fd_to_handle → drm_gem_prime_import → nouveau_gem_prime_import_sg_table); there is no network or adjacent-protocol path into this GPU PRIME import code.\nAC:L - An unprivileged attacker who can open Nouveau and obtain a foreign dma-buf (common hybrid iGPU→Nouveau PRIME, v4l2, or dma-heap) can induce nouveau_bo_init/ttm_bo_init failure via GART/TTM/VMA resource exhaustion so the post-free nouveau_bo_ref() runs deterministically; this is not an attacker-uncontrollable race.\nPR:L - DRM_IOCTL_PRIME_FD_TO_HANDLE is DRM_RENDER_ALLOW and usable by an unprivileged local user with access to /dev/dri/renderD* (render/video group or seat uaccess), without real root or init-namespace admin.\nUI:N - The attacker opens the render node and issues the PRIME FD-to-handle ioctl themselves; no separate victim mount, file open, or interactive action is required.\nS:U - Impact is confined to the host kernel's Nouveau/TTM heap within the same OS security authority; this is local privilege-escalation class corruption, not a VM escape, IOMMU bypass, or sandbox boundary cross.\nC:H - On nouveau_bo_init failure, ttm already calls nouveau_bo_del_ttm()/kfree(nvbo), then the buggy nouveau_bo_ref() performs ttm_bo_put() on the freed object—a classic UAF that per guidance enables arbitrary kernel read via reclaim/spray.\nI:H - The same post-free ttm_bo_put()/kref path corrupts heap metadata and enables reuse of the freed nouveau_bo for arbitrary write and control-flow hijack primitives.\nA:H - Use-after-free on the freed TTM/GEM object produces kernel oops/panic even when not fully exploited, which scores Availability High under kernel CVSS guidance." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/nouveau/nouveau_prime.c" ], "versions": [ { "version": "019cbd4a4feb3aa3a917d78e7110e3011bbff6d5", "lessThan": "56ee9577915dc06f55309901012a9ef68dbdb5a8", "status": "affected", "versionType": "git" }, { "version": "019cbd4a4feb3aa3a917d78e7110e3011bbff6d5", "lessThan": "5d6093c49c098d86c7b136aba9922df44aeb6944", "status": "affected", "versionType": "git" }, { "version": "019cbd4a4feb3aa3a917d78e7110e3011bbff6d5", "lessThan": "861f085f81fd569b02cc2c11165a9e6cca144424", "status": "affected", "versionType": "git" }, { "version": "019cbd4a4feb3aa3a917d78e7110e3011bbff6d5", "lessThan": "3aeda2fe6517cc52663d4ce3588dd43f0d4124a7", "status": "affected", "versionType": "git" }, { "version": "019cbd4a4feb3aa3a917d78e7110e3011bbff6d5", "lessThan": "7d80473e9f12548ac05b36af4fb9ce80f2f73509", "status": "affected", "versionType": "git" }, { "version": "019cbd4a4feb3aa3a917d78e7110e3011bbff6d5", "lessThan": "540dfd188ea2940582841c1c220bd035a7db0e51", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/nouveau/nouveau_prime.c" ], "versions": [ { "version": "5.4", "status": "affected" }, { "version": "0", "lessThan": "5.4", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.220", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.150", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.75", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.17", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.3", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.4.220" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.10.150" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.15.75" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.19.17" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.0.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/56ee9577915dc06f55309901012a9ef68dbdb5a8" }, { "url": "https://git.kernel.org/stable/c/5d6093c49c098d86c7b136aba9922df44aeb6944" }, { "url": "https://git.kernel.org/stable/c/861f085f81fd569b02cc2c11165a9e6cca144424" }, { "url": "https://git.kernel.org/stable/c/3aeda2fe6517cc52663d4ce3588dd43f0d4124a7" }, { "url": "https://git.kernel.org/stable/c/7d80473e9f12548ac05b36af4fb9ce80f2f73509" }, { "url": "https://git.kernel.org/stable/c/540dfd188ea2940582841c1c220bd035a7db0e51" } ], "title": "drm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table()", "x_generator": { "engine": "bippy-1.2.0" } } } }