CVE-2025-21842

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-21842", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.777Z", "datePublished": "2025-03-07T09:10:00.298Z", "dateUpdated": "2026-08-05T11:54:51.838Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:54:51.838Z"}, "descriptions": [{"lang": "en", "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."}], "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 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 \u2014 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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c"], "versions": [{"version": "fb91065851cd5f2735348c5f3eddeeca3d7c2973", "lessThan": "ae5ab1c1ae504f622cc1ff48830a9ed48428146d", "status": "affected", "versionType": "git"}, {"version": "fb91065851cd5f2735348c5f3eddeeca3d7c2973", "lessThan": "091a68c58c1bbd2ab7d05d1b32c1306394ec691d", "status": "affected", "versionType": "git"}, {"version": "fb91065851cd5f2735348c5f3eddeeca3d7c2973", "lessThan": "a33f7f9660705fb2ecf3467b2c48965564f392ce", "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/amd/amdkfd/kfd_process_queue_manager.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.16", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13.4", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14", "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": "6.12", "versionEndExcluding": "6.12.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.13.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.14"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ae5ab1c1ae504f622cc1ff48830a9ed48428146d"}, {"url": "https://git.kernel.org/stable/c/091a68c58c1bbd2ab7d05d1b32c1306394ec691d"}, {"url": "https://git.kernel.org/stable/c/a33f7f9660705fb2ecf3467b2c48965564f392ce"}], "title": "amdkfd: properly free gang_ctx_bo when failed to init user queue", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ae5ab1c1ae504f622cc1ff48830a9ed48428146d", "status": "affected", "version": "fb91065851cd5f2735348c5f3eddeeca3d7c2973", "versionType": "git"}, {"lessThan": "091a68c58c1bbd2ab7d05d1b32c1306394ec691d", "status": "affected", "version": "fb91065851cd5f2735348c5f3eddeeca3d7c2973", "versionType": "git"}, {"lessThan": "a33f7f9660705fb2ecf3467b2c48965564f392ce", "status": "affected", "version": "fb91065851cd5f2735348c5f3eddeeca3d7c2973", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"lessThan": "6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.16", "versionType": "semver"}, {"lessThanOrEqual": "6.13.*", "status": "unaffected", "version": "6.13.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.14", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "537F3B42-2EC5-47FB-8166-5ACF0353AFEC", "versionEndExcluding": "6.12.16", "versionStartIncluding": "6.12", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2A2093ED-74A9-43F9-AC72-50030F374EA4", "versionEndExcluding": "6.13.4", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*", "matchCriteriaId": "186716B6-2B66-4BD0-852E-D48E71C0C85F", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*", "matchCriteriaId": "0D3E781C-403A-498F-9DA9-ECEE50F41E75", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "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."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: amdkfd: libera correctamente gang_ctx_bo cuando no se puede inicializar la cola de usuarios El destructor de un bo gtt se declara como void amdgpu_amdkfd_free_gtt_mem(struct amdgpu_device *adev, void **mem_obj); que toma void** como segundo par\u00e1metro. GCC permite pasar void* a la funci\u00f3n porque void* se puede convertir impl\u00edcitamente a cualquier otro tipo, por lo que puede pasar la compilaci\u00f3n. Sin embargo, pasar este par\u00e1metro void* al proceso de ejecuci\u00f3n de la funci\u00f3n (que espera void** y desreferenciar void**) dar\u00e1 como resultado errores."}], "id": "CVE-2025-21842", "lastModified": "2026-07-30T06:21:40.627", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-03-07T09:15:17.237", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/091a68c58c1bbd2ab7d05d1b32c1306394ec691d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a33f7f9660705fb2ecf3467b2c48965564f392ce"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ae5ab1c1ae504f622cc1ff48830a9ed48428146d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: amdkfd: properly free gang_ctx_bo when failed to init user queue", "id": "2350587", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2350587"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-99", "details": ["In the Linux kernel, the following vulnerability has been resolved:\namdkfd: properly free gang_ctx_bo when failed to init user queue\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.\nGCC allows passing void* to the function because void* can be implicitly\ncasted to any other types, so it can pass compiling.\nHowever, passing this void* parameter into the function's\nexecution process(which expects void** and dereferencing void**)\nwill result in errors."], "name": "CVE-2025-21842", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-03-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-21842\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-21842\nhttps://lore.kernel.org/linux-cve-announce/2025030708-CVE-2025-21842-2ddd@gregkh/T"], "threat_severity": "Low"}

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