CVE-2026-31647

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31647", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.127Z", "datePublished": "2026-04-24T14:45:00.734Z", "dateUpdated": "2026-11-06T15:32:21.196Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:12:51.719Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: fix PREEMPT_RT raw/bh spinlock nesting for async VC handling\n\nSwitch from using the completion's raw spinlock to a local lock in the\nidpf_vc_xn struct. The conversion is safe because complete/_all() are\ncalled outside the lock and there is no reason to share the completion\nlock in the current logic. This avoids invalid wait context reported by\nthe kernel due to the async handler taking BH spinlock:\n\n[ 805.726977] =============================\n[ 805.726991] [ BUG: Invalid wait context ]\n[ 805.727006] 7.0.0-rc2-net-devq-031026+ #28 Tainted: G S OE\n[ 805.727026] -----------------------------\n[ 805.727038] kworker/u261:0/572 is trying to lock:\n[ 805.727051] ff190da6a8dbb6a0 (&vport_config->mac_filter_list_lock){+...}-{3:3}, at: idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727099] other info that might help us debug this:\n[ 805.727111] context-{5:5}\n[ 805.727119] 3 locks held by kworker/u261:0/572:\n[ 805.727132] #0: ff190da6db3e6148 ((wq_completion)idpf-0000:83:00.0-mbx){+.+.}-{0:0}, at: process_one_work+0x4b5/0x730\n[ 805.727163] #1: ff3c6f0a6131fe50 ((work_completion)(&(&adapter->mbx_task)->work)){+.+.}-{0:0}, at: process_one_work+0x1e5/0x730\n[ 805.727191] #2: ff190da765190020 (&x->wait#34){+.+.}-{2:2}, at: idpf_recv_mb_msg+0xc8/0x710 [idpf]\n[ 805.727218] stack backtrace:\n...\n[ 805.727238] Workqueue: idpf-0000:83:00.0-mbx idpf_mbx_task [idpf]\n[ 805.727247] Call Trace:\n[ 805.727249] <TASK>\n[ 805.727251] dump_stack_lvl+0x77/0xb0\n[ 805.727259] __lock_acquire+0xb3b/0x2290\n[ 805.727268] ? __irq_work_queue_local+0x59/0x130\n[ 805.727275] lock_acquire+0xc6/0x2f0\n[ 805.727277] ? idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727284] ? _printk+0x5b/0x80\n[ 805.727290] _raw_spin_lock_bh+0x38/0x50\n[ 805.727298] ? idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727303] idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727310] idpf_recv_mb_msg+0x1c8/0x710 [idpf]\n[ 805.727317] process_one_work+0x226/0x730\n[ 805.727322] worker_thread+0x19e/0x340\n[ 805.727325] ? __pfx_worker_thread+0x10/0x10\n[ 805.727328] kthread+0xf4/0x130\n[ 805.727333] ? __pfx_kthread+0x10/0x10\n[ 805.727336] ret_from_fork+0x32c/0x410\n[ 805.727345] ? __pfx_kthread+0x10/0x10\n[ 805.727347] ret_from_fork_asm+0x1a/0x30\n[ 805.727354] </TASK>"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/intel/idpf/idpf_virtchnl.c", "drivers/net/ethernet/intel/idpf/idpf_virtchnl.h"], "versions": [{"version": "34c21fa894a1af6166f4284c81d1dc21efed8f38", "lessThan": "b448529f2f2921c6fe82fd4e985cc7c05cbf02a3", "status": "affected", "versionType": "git"}, {"version": "34c21fa894a1af6166f4284c81d1dc21efed8f38", "lessThan": "e02c974fc331f04b5ba2007d4bc6862df8a43148", "status": "affected", "versionType": "git"}, {"version": "34c21fa894a1af6166f4284c81d1dc21efed8f38", "lessThan": "3bb632c6b6d8154e9019beda4a43a4b518ee3e8a", "status": "affected", "versionType": "git"}, {"version": "34c21fa894a1af6166f4284c81d1dc21efed8f38", "lessThan": "591478118293c1bd628de330a99eb1eb2ef8d76b", "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/net/ethernet/intel/idpf/idpf_virtchnl.c", "drivers/net/ethernet/intel/idpf/idpf_virtchnl.h"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.83", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.23", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.13", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.9", "versionEndExcluding": "6.12.83"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.18.23"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.19.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b448529f2f2921c6fe82fd4e985cc7c05cbf02a3"}, {"url": "https://git.kernel.org/stable/c/e02c974fc331f04b5ba2007d4bc6862df8a43148"}, {"url": "https://git.kernel.org/stable/c/3bb632c6b6d8154e9019beda4a43a4b518ee3e8a"}, {"url": "https://git.kernel.org/stable/c/591478118293c1bd628de330a99eb1eb2ef8d76b"}], "title": "idpf: fix PREEMPT_RT raw/bh spinlock nesting for async VC handling", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-31647", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T15:23:26.991090Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T15:32:21.196Z"}}]}}

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The conversion is safe because complete/_all() are\ncalled outside the lock and there is no reason to share the completion\nlock in the current logic. This avoids invalid wait context reported by\nthe kernel due to the async handler taking BH spinlock:\n\n[ 805.726977] =============================\n[ 805.726991] [ BUG: Invalid wait context ]\n[ 805.727006] 7.0.0-rc2-net-devq-031026+ #28 Tainted: G S OE\n[ 805.727026] -----------------------------\n[ 805.727038] kworker/u261:0/572 is trying to lock:\n[ 805.727051] ff190da6a8dbb6a0 (&vport_config->mac_filter_list_lock){+...}-{3:3}, at: idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727099] other info that might help us debug this:\n[ 805.727111] context-{5:5}\n[ 805.727119] 3 locks held by kworker/u261:0/572:\n[ 805.727132] #0: ff190da6db3e6148 ((wq_completion)idpf-0000:83:00.0-mbx){+.+.}-{0:0}, at: process_one_work+0x4b5/0x730\n[ 805.727163] #1: ff3c6f0a6131fe50 ((work_completion)(&(&adapter->mbx_task)->work)){+.+.}-{0:0}, at: process_one_work+0x1e5/0x730\n[ 805.727191] #2: ff190da765190020 (&x->wait#34){+.+.}-{2:2}, at: idpf_recv_mb_msg+0xc8/0x710 [idpf]\n[ 805.727218] stack backtrace:\n...\n[ 805.727238] Workqueue: idpf-0000:83:00.0-mbx idpf_mbx_task [idpf]\n[ 805.727247] Call Trace:\n[ 805.727249] <TASK>\n[ 805.727251] dump_stack_lvl+0x77/0xb0\n[ 805.727259] __lock_acquire+0xb3b/0x2290\n[ 805.727268] ? __irq_work_queue_local+0x59/0x130\n[ 805.727275] lock_acquire+0xc6/0x2f0\n[ 805.727277] ? idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727284] ? _printk+0x5b/0x80\n[ 805.727290] _raw_spin_lock_bh+0x38/0x50\n[ 805.727298] ? idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727303] idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727310] idpf_recv_mb_msg+0x1c8/0x710 [idpf]\n[ 805.727317] process_one_work+0x226/0x730\n[ 805.727322] worker_thread+0x19e/0x340\n[ 805.727325] ? __pfx_worker_thread+0x10/0x10\n[ 805.727328] kthread+0xf4/0x130\n[ 805.727333] ? __pfx_kthread+0x10/0x10\n[ 805.727336] ret_from_fork+0x32c/0x410\n[ 805.727345] ? __pfx_kthread+0x10/0x10\n[ 805.727347] ret_from_fork_asm+0x1a/0x30\n[ 805.727354] </TASK>"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.83", "versionStartIncluding": "6.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.23", "versionStartIncluding": "6.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19.13", "versionStartIncluding": "6.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0", "versionStartIncluding": "6.9"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:12:51.719Z"}}}, "cveMetadata": {"cveId": "CVE-2026-31647", "state": "PUBLISHED", "dateUpdated": "2026-11-06T15:32:21.196Z", "dateReserved": "2026-03-09T15:48:24.127Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-04-24T14:45:00.734Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/intel/idpf/idpf_virtchnl.c", "drivers/net/ethernet/intel/idpf/idpf_virtchnl.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b448529f2f2921c6fe82fd4e985cc7c05cbf02a3", "status": "affected", "version": "34c21fa894a1af6166f4284c81d1dc21efed8f38", "versionType": "git"}, {"lessThan": "e02c974fc331f04b5ba2007d4bc6862df8a43148", "status": "affected", "version": "34c21fa894a1af6166f4284c81d1dc21efed8f38", "versionType": "git"}, {"lessThan": "3bb632c6b6d8154e9019beda4a43a4b518ee3e8a", "status": "affected", "version": "34c21fa894a1af6166f4284c81d1dc21efed8f38", "versionType": "git"}, {"lessThan": "591478118293c1bd628de330a99eb1eb2ef8d76b", "status": "affected", "version": "34c21fa894a1af6166f4284c81d1dc21efed8f38", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/intel/idpf/idpf_virtchnl.c", "drivers/net/ethernet/intel/idpf/idpf_virtchnl.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"lessThan": "6.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.83", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.23", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.13", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4A76C099-8DB9-474D-90CA-61674BD1ED6E", "versionEndExcluding": "6.12.83", "versionStartIncluding": "6.9.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E9E09FDD-9EE3-4A56-92E2-2B30AFD0072F", "versionEndExcluding": "6.18.23", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1490EF9B-9080-481C-8D22-1306AAE664E4", "versionEndExcluding": "6.19.13", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:-:*:*:*:*:*:*", "matchCriteriaId": "3F2A4A3D-068A-4CF2-A09F-9C7937DDB0A5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: fix PREEMPT_RT raw/bh spinlock nesting for async VC handling\n\nSwitch from using the completion's raw spinlock to a local lock in the\nidpf_vc_xn struct. The conversion is safe because complete/_all() are\ncalled outside the lock and there is no reason to share the completion\nlock in the current logic. This avoids invalid wait context reported by\nthe kernel due to the async handler taking BH spinlock:\n\n[ 805.726977] =============================\n[ 805.726991] [ BUG: Invalid wait context ]\n[ 805.727006] 7.0.0-rc2-net-devq-031026+ #28 Tainted: G S OE\n[ 805.727026] -----------------------------\n[ 805.727038] kworker/u261:0/572 is trying to lock:\n[ 805.727051] ff190da6a8dbb6a0 (&vport_config->mac_filter_list_lock){+...}-{3:3}, at: idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727099] other info that might help us debug this:\n[ 805.727111] context-{5:5}\n[ 805.727119] 3 locks held by kworker/u261:0/572:\n[ 805.727132] #0: ff190da6db3e6148 ((wq_completion)idpf-0000:83:00.0-mbx){+.+.}-{0:0}, at: process_one_work+0x4b5/0x730\n[ 805.727163] #1: ff3c6f0a6131fe50 ((work_completion)(&(&adapter->mbx_task)->work)){+.+.}-{0:0}, at: process_one_work+0x1e5/0x730\n[ 805.727191] #2: ff190da765190020 (&x->wait#34){+.+.}-{2:2}, at: idpf_recv_mb_msg+0xc8/0x710 [idpf]\n[ 805.727218] stack backtrace:\n...\n[ 805.727238] Workqueue: idpf-0000:83:00.0-mbx idpf_mbx_task [idpf]\n[ 805.727247] Call Trace:\n[ 805.727249] <TASK>\n[ 805.727251] dump_stack_lvl+0x77/0xb0\n[ 805.727259] __lock_acquire+0xb3b/0x2290\n[ 805.727268] ? __irq_work_queue_local+0x59/0x130\n[ 805.727275] lock_acquire+0xc6/0x2f0\n[ 805.727277] ? idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727284] ? _printk+0x5b/0x80\n[ 805.727290] _raw_spin_lock_bh+0x38/0x50\n[ 805.727298] ? idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727303] idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727310] idpf_recv_mb_msg+0x1c8/0x710 [idpf]\n[ 805.727317] process_one_work+0x226/0x730\n[ 805.727322] worker_thread+0x19e/0x340\n[ 805.727325] ? __pfx_worker_thread+0x10/0x10\n[ 805.727328] kthread+0xf4/0x130\n[ 805.727333] ? __pfx_kthread+0x10/0x10\n[ 805.727336] ret_from_fork+0x32c/0x410\n[ 805.727345] ? __pfx_kthread+0x10/0x10\n[ 805.727347] ret_from_fork_asm+0x1a/0x30\n[ 805.727354] </TASK>"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nidpf: corrige el anidamiento de spinlock raw/bh de PREEMPT_RT para el manejo as\u00edncrono de VC\n\nCambia de usar el spinlock raw de la finalizaci\u00f3n a un bloqueo local en la estructura idpf_vc_xn. La conversi\u00f3n es segura porque complete/_all() se llaman fuera del bloqueo y no hay raz\u00f3n para compartir el bloqueo de finalizaci\u00f3n en la l\u00f3gica actual. Esto evita el contexto de espera inv\u00e1lido reportado por el kernel debido a que el gestor as\u00edncrono toma el spinlock BH:\n\n[ 805.726977] =============================\n[ 805.726991] [ BUG: Invalid wait context ]\n[ 805.727006] 7.0.0-rc2-net-devq-031026+ #28 Tainted: G S OE\n[ 805.727026] - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n[ 805.727038] kworker/u261:0/572 is trying to lock:\n[ 805.727051] ff190da6a8dbb6a0 (ref:vport_config -> mac_filter_list_lock){+...}-{3:3}, at: idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727099] other info that might help us debug this:\n[ 805.727111] context-{5:5}\n[ 805.727119] 3 locks held by kworker/u261:0/572:\n[ 805.727132] #0: ff190da6db3e6148 ((wq_completion)idpf-0000:83:00.0-mbx){+.+.}-{0:0}, at: process_one_work+0x4b5/0x730\n[ 805.727163] #1: ff3c6f0a6131fe50 ((work_completion)(&(ref:adapter -> mbx_task) -> work)){+.+.}-{0:0}, at: process_one_work+0x1e5/0x730\n[ 805.727191] #2: ff190da765190020 (&x -> wait#34){+.+.}-{2:2}, at: idpf_recv_mb_msg+0xc8/0x710 [idpf]\n[ 805.727218] stack backtrace:\n...\n[ 805.727238] Workqueue: idpf-0000:83:00.0-mbx idpf_mbx_task [idpf]\n[ 805.727247] Call Trace:\n[ 805.727249] [TASK]\n[ 805.727251] dump_stack_lvl+0x77/0xb0\n[ 805.727259] __lock_acquire+0xb3b/0x 2290\n[ 805.727268] ? __irq_work_queue_local+0x59/0x130\n[ 805.727275] lock_acquire+0xc6/0x2f0\n[ 805.727277] ? idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727284] ? _printk+0x5b/0x80\n[ 805.727290] _raw_spin_lock_bh+0x38/0x50\n[ 805.727298] ? idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727303] idpf_mac_filter_async_handler+0xe9/0x260 [idpf]\n[ 805.727310] idpf_recv_mb_msg+0x1c8/0x710 [idpf]\n[ 805.727317] process_one_work+0x226/0x730\n[ 805.727322] worker_thread+0x19e/0x340\n[ 805.727325] ? __pfx_worker_thread+0x10/0x10\n[ 805.727328] kthread+0xf4/0x130\n[ 805.727333] ? __pfx_kthread+0x10/0x10\n[ 805.727336] ret_from_fork+0x32c/0x410\n[ 805.727345] ? __pfx_kthread+0x10/0x10\n[ 805.727347] ret_from_fork_asm+0x1a/0x30\n[ 805.727354] [/TASK]"}], "id": "CVE-2026-31647", "lastModified": "2026-11-11T23:10:00.263", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31647", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T15:23:26.991090Z", "version": "2.0.3"}}]}, "published": "2026-04-24T15:16:44.073", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3bb632c6b6d8154e9019beda4a43a4b518ee3e8a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/591478118293c1bd628de330a99eb1eb2ef8d76b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b448529f2f2921c6fe82fd4e985cc7c05cbf02a3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e02c974fc331f04b5ba2007d4bc6862df8a43148"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: idpf: fix PREEMPT_RT raw/bh spinlock nesting for async VC handling", "id": "2461570", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461570"}, "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-833", "details": ["A flaw was found in the Linux kernel's idpf driver. This vulnerability arises from improper nesting of spinlocks during asynchronous Virtual Channel (VC) handling. An attacker could potentially trigger an invalid wait context, leading to a system crash or denial of service."], "name": "CVE-2026-31647", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31647\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31647\nhttps://lore.kernel.org/linux-cve-announce/2026042459-CVE-2026-31647-3188@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[34c21fa894a1af6166f4284c81d1dc21efed8f38,b448529f2f2921c6fe82fd4e985cc7c05cbf02a3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[34c21fa894a1af6166f4284c81d1dc21efed8f38,e02c974fc331f04b5ba2007d4bc6862df8a43148)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[34c21fa894a1af6166f4284c81d1dc21efed8f38,3bb632c6b6d8154e9019beda4a43a4b518ee3e8a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[34c21fa894a1af6166f4284c81d1dc21efed8f38,591478118293c1bd628de330a99eb1eb2ef8d76b)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.83,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.23,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.13,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "analysis": {"en": {"generated_at": "2026-04-28T20:04:28.088265+00:00", "value": {"mitigation_remediation": ["Download and install the latest kernel package that contains the idpf: fix PREEMPT_RT raw/bh spinlock nesting update.", "Reboot the system to load the patched kernel.", "If immediate kernel upgrade is not possible, consider disabling asynchronous IDPF handling or unloading the idpf module until a patched kernel can be applied."], "summary": {"action": "Apply patch", "impact": "Kernel instability / crash"}, "threat_synthesis": {"affected_systems": "All Linux kernel releases that ship the idpf driver, including generic kernel builds as well as the 6.9 release and the 7.0 series from release candidates rc1 through rc7. The vulnerability is generic to any kernel configuration that enables PREEMPT_RT and loads the idpf module.", "description_and_impact": "The kernel contains a flaw in the idpf device driver where the PREEMPT_RT raw/bh spinlock is nested incorrectly during asynchronous virtual channel handling. This causes an invalid wait context that can trigger kernel panics or other unstable behavior. The issue is a concurrency control defect (CWE-833) that threatens system integrity by allowing a chaining of lock acquisitions that violates the expected lock ownership rules.", "risk_and_exploitability": "The CVSS score of 5.5 indicates a moderate severity, and the EPSS score of less than 1% reflects a very low probability of exploitation under current data. The vulnerability has not been added to the CISA KEV catalog, implying no known exploitable variants. Attackers would need local kernel execution or privileged access to trigger the problematic spinlock sequence, and there are no publicly known exploitation techniques beyond provoking a crash. The impact is limited primarily to service interruption rather than data theft or privilege escalation."}}}}, "created": "2026-04-27T18:45:11.317334+00:00", "updated": "2026-04-28T20:15:26.798549+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}