{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-46803", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-11T15:12:18.281Z", "datePublished": "2024-09-27T12:35:49.185Z", "dateUpdated": "2026-08-05T11:38:41.734Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:38:41.734Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Check debug trap enable before write dbg_ev_file\n\nIn interrupt context, write dbg_ev_file will be run by work queue. It\nwill cause write dbg_ev_file execution after debug_trap_disable, which\nwill cause NULL pointer access.\nv2: cancel work \"debug_event_workarea\" before set dbg_ev_file as NULL." } ], "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_DBG_TRAP ioctl on the /dev/kfd character device (and the process-teardown path), requiring local access to the machine. No network or remote protocol handling is involved.\nAC:L - The attacker controls both sides of the race: they flood debug exceptions by submitting shaders that raise SQ traps/bad opcodes/memory violations (queuing the work item from GPU IRQ) while concurrently issuing KFD_IOC_DBG_TRAP_DISABLE in a loop, and can retry indefinitely until the window is hit.\nPR:L - Only an unprivileged local account with access to /dev/kfd is needed — kfd_open() performs no capability check and the ptrace_parent() gate in kfd_ioctl_set_debug_trap() is bypassed entirely when a process debugs itself (target == p). ROCm systems ship /dev/kfd world- or render-group-accessible, so any local user on an AMD GPU compute node qualifies.\nUI:N - The attacking process performs every step itself — enabling debug trap, submitting the faulting GPU work, and disabling the trap. No victim action or interaction is required.\nS:U - The corruption and its consequences are confined to the kernel of the same host; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - After fput() drops the last reference, the worker uses a dangling struct file from the filp slab cache, and an attacker who reclaims that object controls the f_op table used by kernel_write — a use-after-free that can be leveraged into arbitrary kernel memory disclosure.\nI:H - __kernel_write_iter() indirectly calls file->f_op->write_iter() on the freed struct file, giving a direct control-flow-hijack primitive once the attacker sprays the reclaimed filp object, which translates into arbitrary kernel write and privilege escalation.\nA:H - The commonly observed outcome is a NULL pointer dereference in kernel_write() from a kworker context, oopsing the kernel; the use-after-free variant likewise crashes the machine, and the attacker can trigger it repeatedly." } ] } ], "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_debug.c" ], "versions": [ { "version": "0ab2d7532b05a3e7c06fd3b0c8bd6b46c1dfb508", "lessThan": "e6ea3b8fe398915338147fe54dd2db8155fdafd8", "status": "affected", "versionType": "git" }, { "version": "0ab2d7532b05a3e7c06fd3b0c8bd6b46c1dfb508", "lessThan": "820dcbd38a77bd5fdc4236d521c1c122841227d0", "status": "affected", "versionType": "git" }, { "version": "0ab2d7532b05a3e7c06fd3b0c8bd6b46c1dfb508", "lessThan": "547033b593063eb85bfdf9b25a5f1b8fd1911be2", "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_debug.c" ], "versions": [ { "version": "6.5", "status": "affected" }, { "version": "0", "lessThan": "6.5", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.50", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.9", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11", "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": "6.5", "versionEndExcluding": "6.6.50" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.10.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.11" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e6ea3b8fe398915338147fe54dd2db8155fdafd8" }, { "url": "https://git.kernel.org/stable/c/820dcbd38a77bd5fdc4236d521c1c122841227d0" }, { "url": "https://git.kernel.org/stable/c/547033b593063eb85bfdf9b25a5f1b8fd1911be2" } ], "title": "drm/amdkfd: Check debug trap enable before write dbg_ev_file", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-09-29T14:20:52.974033Z", "id": "CVE-2024-46803", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-29T14:21:05.556Z" } } ] } }