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CVE-2021-47142 (GCVE-0-2021-47142)

Vulnerability from cvelistv5 – Published: 2024-03-25 09:07 – Updated: 2026-08-05 08:46
VLAI
Title
drm/amdgpu: Fix a use-after-free
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix a use-after-free looks like we forget to set ttm->sg to NULL. Hit panic below [ 1235.844104] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI [ 1235.989074] Call Trace: [ 1235.991751] sg_free_table+0x17/0x20 [ 1235.995667] amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu] [ 1236.002288] amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu] [ 1236.008464] ttm_tt_destroy+0x1e/0x30 [ttm] [ 1236.013066] ttm_bo_cleanup_memtype_use+0x51/0xa0 [ttm] [ 1236.018783] ttm_bo_release+0x262/0xa50 [ttm] [ 1236.023547] ttm_bo_put+0x82/0xd0 [ttm] [ 1236.027766] amdgpu_bo_unref+0x26/0x50 [amdgpu] [ 1236.032809] amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu] [ 1236.040400] kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu] [ 1236.046912] kfd_ioctl+0x463/0x690 [amdgpu]
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:55 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 0707c3fea8102d211631ba515ef2159707561b0d (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 3293cf3513d69f00c14d43e2020826d45ea0e46a (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 952ab3f9f48eb0e8050596d41951cf516be6b122 (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < a849e218556f932576c0fb1c5a88714b61709a17 (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 7398c2aab4da960761ec182d04d6d5abbb4a226e (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < f98cdf084405333ee2f5be548a91b2d168e49276 (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < d4ea141fd4b40636a8326df5a377d9c5cf9b3faa (git)
Affected: d38ceaf99ed015f2a0b9af3499791bd3a3daae21 , < 1e5c37385097c35911b0f8a0c67ffd10ee1af9a2 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.2
Unaffected: 0 , < 4.2 (semver)
Unaffected: 4.4.271 , ≤ 4.4.* (semver)
Unaffected: 4.9.271 , ≤ 4.9.* (semver)
Unaffected: 4.14.235 , ≤ 4.14.* (semver)
Unaffected: 4.19.193 , ≤ 4.19.* (semver)
Unaffected: 5.4.124 , ≤ 5.4.* (semver)
Unaffected: 5.10.42 , ≤ 5.10.* (semver)
Unaffected: 5.12.9 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: Fix a use-after-free\\n\\nlooks like we forget to set ttm-\u003esg to NULL.\\nHit panic below\\n\\n[ 1235.844104] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI\\n[ 1235.989074] Call Trace:\\n[ 1235.991751]  sg_free_table+0x17/0x20\\n[ 1235.995667]  amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu]\\n[ 1236.002288]  amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu]\\n[ 1236.008464]  ttm_tt_destroy+0x1e/0x30 [ttm]\\n[ 1236.013066]  ttm_bo_cleanup_memtype_use+0x51/0xa0 [ttm]\\n[ 1236.018783]  ttm_bo_release+0x262/0xa50 [ttm]\\n[ 1236.023547]  ttm_bo_put+0x82/0xd0 [ttm]\\n[ 1236.027766]  amdgpu_bo_unref+0x26/0x50 [amdgpu]\\n[ 1236.032809]  amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu]\\n[ 1236.040400]  kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu]\\n[ 1236.046912]  kfd_ioctl+0x463/0x690 [amdgpu]\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amdgpu: se soluciona un problema de use-after-free que parece que nos olvidamos de configurar ttm-\u0026gt;sg en NULL. Se produce p\\u00e1nico a continuaci\\u00f3n [1235.844104] falla de protecci\\u00f3n general, probablemente para la direcci\\u00f3n no can\\u00f3nica 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI [1235.989074] Seguimiento de llamadas: [1235.991751] sg_free_table+0x17/0x20 [ 123 5.995667] amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu] [ 1236.002288] amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu] [ 1236.008464] ttm_tt_destroy+0x1e/0x30 [ttm] [ 1236.013066] ttm_bo_cleanup_memtype_use+0x51/0xa 0 [ttm] [ 1236.018783] ttm_bo_release+0x262/0xa50 [ttm] [ 1236.023547] ttm_bo_put+0x82/0xd0 [ttm] [ 1236.027766] amdgpu_bo_unref+0x26/0x50 [amdgpu] [ 1236.032809] amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu] [ 123 6.040400] kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu] [ 1236.046912] kfd_ioctl+0x463/0x690 [ amdgpu]\"}]",
      "id": "CVE-2021-47142",
      "lastModified": "2024-12-17T14:56:12.967",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}]}",
      "published": "2024-03-25T09:15:08.843",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/0707c3fea8102d211631ba515ef2159707561b0d\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/1e5c37385097c35911b0f8a0c67ffd10ee1af9a2\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/3293cf3513d69f00c14d43e2020826d45ea0e46a\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/7398c2aab4da960761ec182d04d6d5abbb4a226e\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/952ab3f9f48eb0e8050596d41951cf516be6b122\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/a849e218556f932576c0fb1c5a88714b61709a17\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/d4ea141fd4b40636a8326df5a377d9c5cf9b3faa\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/f98cdf084405333ee2f5be548a91b2d168e49276\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/0707c3fea8102d211631ba515ef2159707561b0d\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/1e5c37385097c35911b0f8a0c67ffd10ee1af9a2\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/3293cf3513d69f00c14d43e2020826d45ea0e46a\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/7398c2aab4da960761ec182d04d6d5abbb4a226e\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/952ab3f9f48eb0e8050596d41951cf516be6b122\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/a849e218556f932576c0fb1c5a88714b61709a17\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/d4ea141fd4b40636a8326df5a377d9c5cf9b3faa\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"https://git.kernel.org/stable/c/f98cdf084405333ee2f5be548a91b2d168e49276\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Analyzed",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-416\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47142\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-25T09:15:08.843\",\"lastModified\":\"2026-08-04T10:16:48.643\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: Fix a use-after-free\\n\\nlooks like we forget to set ttm-\u003esg to NULL.\\nHit panic below\\n\\n[ 1235.844104] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI\\n[ 1235.989074] Call Trace:\\n[ 1235.991751]  sg_free_table+0x17/0x20\\n[ 1235.995667]  amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu]\\n[ 1236.002288]  amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu]\\n[ 1236.008464]  ttm_tt_destroy+0x1e/0x30 [ttm]\\n[ 1236.013066]  ttm_bo_cleanup_memtype_use+0x51/0xa0 [ttm]\\n[ 1236.018783]  ttm_bo_release+0x262/0xa50 [ttm]\\n[ 1236.023547]  ttm_bo_put+0x82/0xd0 [ttm]\\n[ 1236.027766]  amdgpu_bo_unref+0x26/0x50 [amdgpu]\\n[ 1236.032809]  amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu]\\n[ 1236.040400]  kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu]\\n[ 1236.046912]  kfd_ioctl+0x463/0x690 [amdgpu]\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amdgpu: se soluciona un problema de use-after-free que parece que nos olvidamos de configurar ttm-\u0026gt;sg en NULL. Se produce p\u00e1nico a continuaci\u00f3n [1235.844104] falla de protecci\u00f3n general, probablemente para la direcci\u00f3n no can\u00f3nica 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI [1235.989074] Seguimiento de llamadas: [1235.991751] sg_free_table+0x17/0x20 [ 123 5.995667] amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu] [ 1236.002288] amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu] [ 1236.008464] ttm_tt_destroy+0x1e/0x30 [ttm] [ 1236.013066] ttm_bo_cleanup_memtype_use+0x51/0xa 0 [ttm] [ 1236.018783] ttm_bo_release+0x262/0xa50 [ttm] [ 1236.023547] ttm_bo_put+0x82/0xd0 [ttm] [ 1236.027766] amdgpu_bo_unref+0x26/0x50 [amdgpu] [ 1236.032809] amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu] [ 123 6.040400] kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu] [ 1236.046912] kfd_ioctl+0x463/0x690 [ amdgpu]\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"0707c3fea8102d211631ba515ef2159707561b0d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"3293cf3513d69f00c14d43e2020826d45ea0e46a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"952ab3f9f48eb0e8050596d41951cf516be6b122\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"a849e218556f932576c0fb1c5a88714b61709a17\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"7398c2aab4da960761ec182d04d6d5abbb4a226e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"f98cdf084405333ee2f5be548a91b2d168e49276\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"d4ea141fd4b40636a8326df5a377d9c5cf9b3faa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d38ceaf99ed015f2a0b9af3499791bd3a3daae21\",\"lessThan\":\"1e5c37385097c35911b0f8a0c67ffd10ee1af9a2\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.2\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.2\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.4.271\",\"lessThanOrEqual\":\"4.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.271\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.235\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.193\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.124\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.42\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.12.9\",\"lessThanOrEqual\":\"5.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.13\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-10T15:55:00.553933Z\",\"id\":\"CVE-2021-47142\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T20:05:27+00:00",
      "cve": "CVE-2021-47142",
      "id": "CVE-2021-47142",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_affected": "58",
      "product_status:known_not_affected": "140",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amdgpu: Fix a use-after-free",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47142.json",
      "version": "3"
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      "current_release_date": "2026-09-04T00:43:46Z",
      "cve": "CVE-2021-47142",
      "id": "CVE-2021-47142",
      "initial_release_date": "2024-03-27T04:26:02Z",
      "product_status:known_affected": "529",
      "product_status:known_not_affected": "202",
      "product_status:recommended": "221",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-47142",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47142.json",
      "version": "55"
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\"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.193\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.124\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.42\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/0707c3fea8102d211631ba515ef2159707561b0d\"}, {\"url\": \"https://git.kernel.org/stable/c/3293cf3513d69f00c14d43e2020826d45ea0e46a\"}, {\"url\": \"https://git.kernel.org/stable/c/952ab3f9f48eb0e8050596d41951cf516be6b122\"}, {\"url\": \"https://git.kernel.org/stable/c/a849e218556f932576c0fb1c5a88714b61709a17\"}, {\"url\": \"https://git.kernel.org/stable/c/7398c2aab4da960761ec182d04d6d5abbb4a226e\"}, {\"url\": \"https://git.kernel.org/stable/c/f98cdf084405333ee2f5be548a91b2d168e49276\"}, {\"url\": \"https://git.kernel.org/stable/c/d4ea141fd4b40636a8326df5a377d9c5cf9b3faa\"}, {\"url\": \"https://git.kernel.org/stable/c/1e5c37385097c35911b0f8a0c67ffd10ee1af9a2\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: Fix a use-after-free\\n\\nlooks like we forget to set ttm-\u003esg to NULL.\\nHit panic below\\n\\n[ 1235.844104] general protection fault, probably for non-canonical address 0x6b6b6b6b6b6b7b4b: 0000 [#1] SMP DEBUG_PAGEALLOC NOPTI\\n[ 1235.989074] Call Trace:\\n[ 1235.991751]  sg_free_table+0x17/0x20\\n[ 1235.995667]  amdgpu_ttm_backend_unbind.cold+0x4d/0xf7 [amdgpu]\\n[ 1236.002288]  amdgpu_ttm_backend_destroy+0x29/0x130 [amdgpu]\\n[ 1236.008464]  ttm_tt_destroy+0x1e/0x30 [ttm]\\n[ 1236.013066]  ttm_bo_cleanup_memtype_use+0x51/0xa0 [ttm]\\n[ 1236.018783]  ttm_bo_release+0x262/0xa50 [ttm]\\n[ 1236.023547]  ttm_bo_put+0x82/0xd0 [ttm]\\n[ 1236.027766]  amdgpu_bo_unref+0x26/0x50 [amdgpu]\\n[ 1236.032809]  amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu+0x7aa/0xd90 [amdgpu]\\n[ 1236.040400]  kfd_ioctl_alloc_memory_of_gpu+0xe2/0x330 [amdgpu]\\n[ 1236.046912]  kfd_ioctl+0x463/0x690 [amdgpu]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.4.271\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.271\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.235\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.193\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.124\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.42\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.9\", \"versionStartIncluding\": \"4.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"4.2\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:46:18.601Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47142\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:46:18.601Z\", \"dateReserved\": \"2024-03-04T18:12:48.842Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-25T09:07:40.374Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.