159 lines
8.5 KiB
JSON
159 lines
8.5 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-21842",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-12-29T08:45:45.777Z",
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"datePublished": "2025-03-07T09:10:00.298Z",
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"dateUpdated": "2026-08-05T11:54:51.838Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:54:51.838Z"
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},
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"descriptions": [
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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\namdkfd: properly free gang_ctx_bo when failed to init user queue\n\nThe destructor of a gtt bo is declared as\nvoid amdgpu_amdkfd_free_gtt_mem(struct amdgpu_device *adev, void **mem_obj);\nWhich takes void** as the second parameter.\n\nGCC allows passing void* to the function because void* can be implicitly\ncasted to any other types, so it can pass compiling.\n\nHowever, passing this void* parameter into the function's\nexecution process(which expects void** and dereferencing void**)\nwill result in errors."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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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 - The vulnerability is reached through the AMDKFD_IOC_CREATE_QUEUE ioctl on the local /dev/kfd character device; there is no network vector.\nAC:L - The attacker controls the trigger — supplying a wptr buffer allocated on a different GPU deterministically hits the device-mismatch error path on multi-GPU systems, or GART/pin exhaustion forces the map failure; no uncontrollable condition is required.\nPR:L - The create-queue ioctl carries flags=0 with no capability check, so any unprivileged local user with render-group access to /dev/kfd (typical on desktops/workstations) can reach it.\nUI:N - Exploitation is a direct ioctl sequence from the attacker's own process with no victim action required.\nS:U - The invalid dereference and any resulting corruption occur within the kernel's own security authority; no privilege/isolation boundary such as a VM or IOMMU domain is crossed.\nC:H - This pointer-vs-pointer-to-pointer type confusion dereferences a fixed userspace-mappable address (0x200000002); on non-SMAP/PAN or nosmap systems the attacker can back that address with a crafted fake amdgpu_bo, yielding attacker-controlled kernel reads.\nI:H - The same crafted-object primitive feeds amdgpu_bo unpin/unref, which perform refcount decrements and destructor dispatch on the attacker-controlled structure, enabling kernel memory corruption and potential control-flow hijack.\nA:H - On the common case (SMAP enabled) the wild dereference of 0x200000002 faults immediately, producing a kernel oops/panic and denial of service."
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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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{
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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/amdkfd/kfd_process_queue_manager.c"
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],
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"versions": [
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{
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"version": "fb91065851cd5f2735348c5f3eddeeca3d7c2973",
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"lessThan": "ae5ab1c1ae504f622cc1ff48830a9ed48428146d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "fb91065851cd5f2735348c5f3eddeeca3d7c2973",
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"lessThan": "091a68c58c1bbd2ab7d05d1b32c1306394ec691d",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "fb91065851cd5f2735348c5f3eddeeca3d7c2973",
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"lessThan": "a33f7f9660705fb2ecf3467b2c48965564f392ce",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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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/amdkfd/kfd_process_queue_manager.c"
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],
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"versions": [
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{
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"version": "6.12",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.12",
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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": "6.12.16",
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"lessThanOrEqual": "6.12.*",
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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": "6.13.4",
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"lessThanOrEqual": "6.13.*",
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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": "6.14",
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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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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12",
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"versionEndExcluding": "6.12.16"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12",
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"versionEndExcluding": "6.13.4"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12",
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"versionEndExcluding": "6.14"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/ae5ab1c1ae504f622cc1ff48830a9ed48428146d"
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},
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{
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"url": "https://git.kernel.org/stable/c/091a68c58c1bbd2ab7d05d1b32c1306394ec691d"
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},
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{
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"url": "https://git.kernel.org/stable/c/a33f7f9660705fb2ecf3467b2c48965564f392ce"
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}
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],
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"title": "amdkfd: properly free gang_ctx_bo when failed to init user queue",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |