CVE-2021-47457

{"id": "CVE-2021-47457", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-05-22T07:15:10.710", "references": [{"url": "https://git.kernel.org/stable/c/053bc12df0d6097c1126d0e14fa778a0a8faeb64", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9acf636215a6ce9362fe618e7da4913b8bfe84c8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a76abedd2be3926d6deba236a935c7f98abf9110", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/053bc12df0d6097c1126d0e14fa778a0a8faeb64", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/9acf636215a6ce9362fe618e7da4913b8bfe84c8", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/a76abedd2be3926d6deba236a935c7f98abf9110", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: isotp: isotp_sendmsg(): add result check for wait_event_interruptible()\n\nUsing wait_event_interruptible() to wait for complete transmission,\nbut do not check the result of wait_event_interruptible() which can be\ninterrupted. It will result in TX buffer has multiple accessors and\nthe later process interferes with the previous process.\n\nFollowing is one of the problems reported by syzbot.\n\n=============================================================\nWARNING: CPU: 0 PID: 0 at net/can/isotp.c:840 isotp_tx_timer_handler+0x2e0/0x4c0\nCPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.13.0-rc7+ #68\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1 04/01/2014\nRIP: 0010:isotp_tx_timer_handler+0x2e0/0x4c0\nCall Trace:\n <IRQ>\n ? isotp_setsockopt+0x390/0x390\n __hrtimer_run_queues+0xb8/0x610\n hrtimer_run_softirq+0x91/0xd0\n ? rcu_read_lock_sched_held+0x4d/0x80\n __do_softirq+0xe8/0x553\n irq_exit_rcu+0xf8/0x100\n sysvec_apic_timer_interrupt+0x9e/0xc0\n </IRQ>\n asm_sysvec_apic_timer_interrupt+0x12/0x20\n\nAdd result check for wait_event_interruptible() in isotp_sendmsg()\nto avoid multiple accessers for tx buffer."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: isotp: isotp_sendmsg(): agregar verificaci\u00f3n de resultado para wait_event_interruptible() Usar wait_event_interruptible() para esperar la transmisi\u00f3n completa, pero no verificar el resultado de wait_event_interruptible() que puede ser interrumpido. Dar\u00e1 como resultado que el b\u00fafer TX tenga m\u00faltiples accesos y el proceso posterior interfiera con el proceso anterior. El siguiente es uno de los problemas informados por syzbot. ==================================================== =========== ADVERTENCIA: CPU: 0 PID: 0 en net/can/isotp.c:840 isotp_tx_timer_handler+0x2e0/0x4c0 CPU: 0 PID: 0 Comm: swapper/0 No contaminado 5.13.0 -rc7+ #68 Nombre del hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1 01/04/2014 RIP: 0010:isotp_tx_timer_handler+0x2e0/0x4c0 Seguimiento de llamadas: ? isotp_setsockopt+0x390/0x390 __hrtimer_run_queues+0xb8/0x610 hrtimer_run_softirq+0x91/0xd0 ? rcu_read_lock_sched_held+0x4d/0x80 __do_softirq+0xe8/0x553 irq_exit_rcu+0xf8/0x100 sysvec_apic_timer_interrupt+0x9e/0xc0 asm_sysvec_apic_timer_interrupt+0x12/0x20 Agregar verificaci\u00f3n de resultado para wait_event_ interrumpible() en isotp_sendmsg() para evitar m\u00faltiples accesos al b\u00fafer tx."}], "lastModified": "2025-09-29T16:44:09.877", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F98FB34A-F721-4282-8F8F-2192E4680BED", "versionEndExcluding": "5.10.76", "versionStartIncluding": "5.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "63BD46C4-473F-45F9-93E9-F67D955321D8", "versionEndExcluding": "5.14.15", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E46C74C6-B76B-4C94-A6A4-FD2FFF62D644"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "60134C3A-06E4-48C1-B04F-2903732A4E56"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0460DA88-8FE1-46A2-9DDA-1F1ABA552E71"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AF55383D-4DF2-45DC-93F7-571F4F978EAB"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9E9481B2-8AA6-4CBD-B5D3-C10F51FF6D01"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EBD45831-4B79-42BC-ABC0-86870F0DEA89"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}