CVE-2025-39706

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It happens\nwhen /sys/kernel/debug/kfd was already destroyed in kfd_debugfs_fini but\nkfd_process_destroy_wq calls kfd_debugfs_remove_process. This line\n debugfs_remove_recursive(entry->proc_dentry);\ntries to remove /sys/kernel/debug/kfd/proc/<pid> while\n/sys/kernel/debug/kfd is already gone. It hangs the kernel by kernel\nNULL pointer.\n\n(cherry picked from commit 0333052d90683d88531558dcfdbf2525cc37c233)"}], "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_module.c"], "versions": [{"version": "4a488a7ad71401169cecee75dc94bcce642e2c53", "lessThan": "fc35c955da799ba62f6f977d58e0866d0251e3f8", "status": "affected", "versionType": "git"}, {"version": "4a488a7ad71401169cecee75dc94bcce642e2c53", "lessThan": "74ee7445c3b61c3bd899a54bd82c1982cb3a8206", "status": "affected", "versionType": "git"}, {"version": "4a488a7ad71401169cecee75dc94bcce642e2c53", "lessThan": "96609a51e6134542bf90e053c2cd2fe4f61ebce3", "status": "affected", "versionType": "git"}, {"version": "4a488a7ad71401169cecee75dc94bcce642e2c53", "lessThan": "910735ded17cc306625e7e1cdcc8102f7ac60994", "status": "affected", "versionType": "git"}, {"version": "4a488a7ad71401169cecee75dc94bcce642e2c53", "lessThan": "2e58401a24e7b2d4ec619104e1a76590c1284a4c", "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_module.c"], "versions": [{"version": "3.19", "status": "affected"}, {"version": "0", "lessThan": "3.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.149", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.103", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.44", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.4", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17", "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": "3.19", "versionEndExcluding": "6.1.149"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.6.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.12.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.16.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fc35c955da799ba62f6f977d58e0866d0251e3f8"}, {"url": "https://git.kernel.org/stable/c/74ee7445c3b61c3bd899a54bd82c1982cb3a8206"}, {"url": "https://git.kernel.org/stable/c/96609a51e6134542bf90e053c2cd2fe4f61ebce3"}, {"url": "https://git.kernel.org/stable/c/910735ded17cc306625e7e1cdcc8102f7ac60994"}, {"url": "https://git.kernel.org/stable/c/2e58401a24e7b2d4ec619104e1a76590c1284a4c"}], "title": "drm/amdkfd: Destroy KFD debugfs after destroy KFD wq", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:42:33.582Z"}}, {"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-05-12T12:06:26.796Z"}, "affected": [{"vendor": "Siemens", "product": "SIMATIC CN 4100", "versions": [{"status": "affected", "version": "0", "lessThan": "V5.0", "versionType": "custom"}], "defaultStatus": "unknown"}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"}]}]}}

{}

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Move kfd_process_destroy_wq prior\nto kfd_debugfs_fini to fix a kernel NULL pointer problem. It happens\nwhen /sys/kernel/debug/kfd was already destroyed in kfd_debugfs_fini but\nkfd_process_destroy_wq calls kfd_debugfs_remove_process. This line\n debugfs_remove_recursive(entry->proc_dentry);\ntries to remove /sys/kernel/debug/kfd/proc/<pid> while\n/sys/kernel/debug/kfd is already gone. It hangs the kernel by kernel\nNULL pointer.\n\n(cherry picked from commit 0333052d90683d88531558dcfdbf2525cc37c233)"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/amdkfd: Destruir KFD debugfs despu\u00e9s de destruir KFD wq\n\nDado que el contenido de KFD proc fue movido a kernel debugfs, no podemos destruir KFD debugfs antes de kfd_process_destroy_wq. Mover kfd_process_destroy_wq antes de kfd_debugfs_fini para solucionar un problema de puntero NULL del kernel. Sucede cuando /sys/kernel/debug/kfd ya fue destruido en kfd_debugfs_fini pero kfd_process_destroy_wq llama a kfd_debugfs_remove_process. Esta l\u00ednea\n debugfs_remove_recursive(entry->proc_dentry);\nintenta eliminar /sys/kernel/debug/kfd/proc/<pid> mientras /sys/kernel/debug/kfd ya no existe. Cuelga el kernel por un puntero NULL del kernel.\n\n(seleccionado de la confirmaci\u00f3n 0333052d90683d88531558dcfdbf2525cc37c233)"}], "id": "CVE-2025-39706", "lastModified": "2026-10-19T21:10:00.160", "metrics": {"cvssMetricV31": [{"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": "2025-09-05T18:15:47.817", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2e58401a24e7b2d4ec619104e1a76590c1284a4c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/74ee7445c3b61c3bd899a54bd82c1982cb3a8206"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/910735ded17cc306625e7e1cdcc8102f7ac60994"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/96609a51e6134542bf90e053c2cd2fe4f61ebce3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fc35c955da799ba62f6f977d58e0866d0251e3f8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: drm/amdkfd: Destroy KFD debugfs after destroy KFD wq", "id": "2393545", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2393545"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-39706", "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": "2025-09-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-39706\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-39706\nhttps://lore.kernel.org/linux-cve-announce/2025090549-CVE-2025-39706-087c@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-07T15:47:32.540646+00:00", "updated": "2025-09-07T15:47:32.540702+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}