CVE-2024-46803

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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 \u2014 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 \u2014 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 \u2014 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"}}]}}

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{"bugzilla": {"description": "kernel: drm/amdkfd: Check debug trap enable before write dbg_ev_file", "id": "2315154", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2315154"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/amdkfd: Check debug trap enable before write dbg_ev_file\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."], "name": "CVE-2024-46803", "package_state": [{"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": "2024-09-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-46803\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-46803\nhttps://lore.kernel.org/linux-cve-announce/2024092708-CVE-2024-46803-689b@gregkh/T"], "threat_severity": "Moderate"}

{}