172 lines
8.9 KiB
JSON
172 lines
8.9 KiB
JSON
{
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"cveId": "CVE-2022-48990",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-08-22T01:27:53.635Z",
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"datePublished": "2024-10-21T20:06:07.203Z",
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"dateUpdated": "2026-08-05T08:53:19.510Z"
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},
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix use-after-free during gpu recovery\n\n[Why]\n [ 754.862560] refcount_t: underflow; use-after-free.\n [ 754.862898] Call Trace:\n [ 754.862903] <TASK>\n [ 754.862913] amdgpu_job_free_cb+0xc2/0xe1 [amdgpu]\n [ 754.863543] drm_sched_main.cold+0x34/0x39 [amd_sched]\n\n[How]\n The fw_fence may be not init, check whether dma_fence_init\n is performed before job free"
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}
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{
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - Reachable only via local AMDGPU DRM paths on /dev/dri/renderD* (AMDGPU_CS submission and context/entity teardown into amdgpu_job_free_cb); there is no network or adjacent-protocol entry into the GPU scheduler job free path.\nAC:L - An attacker fully controls both sides—queue jobs then destroy the context/process (drm_sched_entity_kill → free_job on never-run jobs), or hang the GPU to force recovery so skipped jobs hit free_cb without dma_fence_init—so the uninitialized hw_fence put is deterministic with no attacker-uncontrollable race.\nPR:L - AMDGPU_CS/CTX are DRM_AUTH|DRM_RENDER_ALLOW; any unprivileged user with render-node access (render/video group, desktop sessions, Android GPU apps) can open /dev/dri/renderD* and submit/teardown work without CAP_SYS_ADMIN or real root.\nUI:N - The attacker opens the render node and issues AMDGPU_CS/context destroy (or triggers a hang) entirely from their own process; no separate victim action is required.\nS:U - Impact is confined to the host kernel’s security authority (local job/fence lifetime corruption in amdgpu); there is no VM escape, IOMMU bypass, or other cross-boundary scope change.\nC:H - The kernel classifies this as use-after-free (refcount_t underflow on the embedded hw_fence in amdgpu_job_free_cb); per UAF guidance, reclaim/spray of the corrupted job/fence lifetime enables arbitrary kernel read primitives.\nI:H - The same UAF-class fence/job free-path corruption (putting an uninitialized or incorrectly lifetime-managed hw_fence) enables heap corruption suitable for arbitrary write and control-flow hijack, matching prior amdgpu UAF scoring.\nA:H - The demonstrated effect is a kernel WARNING/refcount underflow use-after-free in amdgpu_job_free_cb (and can panic under panic_on_warn), and the bad free path can oops or destabilize GPU recovery/teardown, which is High availability impact."
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}
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]
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}
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],
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"affected": [
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/amd/amdgpu/amdgpu_job.c"
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],
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"drivers/gpu/drm/amd/amdgpu/amdgpu_job.c"
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{
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"version": "0",
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"lessThan": "6.0",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.0.13",
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"lessThanOrEqual": "6.0.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/d2a89cd942edd50c1e652004fd64019be78b0a96"
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},
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{
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"url": "https://git.kernel.org/stable/c/3cb93f390453cde4d6afda1587aaa00e75e09617"
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}
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"title": "drm/amdgpu: fix use-after-free during gpu recovery",
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"type": "ssvc",
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"content": {
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"id": "CVE-2022-48990",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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"version": "2.0.3",
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"timestamp": "2024-10-22T13:16:41.708497Z"
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