CVE-2026-23217

{"id": "CVE-2026-23217", "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": "2026-02-18T15:18:43.080", "references": [{"url": "https://git.kernel.org/stable/c/b0d7f5f0c9f05f1b6d4ee7110f15bef9c11f9df0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b1f8285bc8e3508c1fde23b5205f1270215d4984", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-667"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: trace: fix snapshot deadlock with sbi ecall\n\nIf sbi_ecall.c's functions are traceable,\n\necho \"__sbi_ecall:snapshot\" > /sys/kernel/tracing/set_ftrace_filter\n\nmay get the kernel into a deadlock.\n\n(Functions in sbi_ecall.c are excluded from tracing if\nCONFIG_RISCV_ALTERNATIVE_EARLY is set.)\n\n__sbi_ecall triggers a snapshot of the ringbuffer. The snapshot code\nraises an IPI interrupt, which results in another call to __sbi_ecall\nand another snapshot...\n\nAll it takes to get into this endless loop is one initial __sbi_ecall.\nOn RISC-V systems without SSTC extension, the clock events in\ntimer-riscv.c issue periodic sbi ecalls, making the problem easy to\ntrigger.\n\nAlways exclude the sbi_ecall.c functions from tracing to fix the\npotential deadlock.\n\nsbi ecalls can easiliy be logged via trace events, excluding ecall\nfunctions from function tracing is not a big limitation."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nriscv: trace: corregir interbloqueo de instant\u00e1nea con sbi ecall\n\nSi las funciones de sbi_ecall.c son rastreables,\n\necho '__sbi_ecall:snapshot' > /sys/kernel/tracing/set_ftrace_filter\n\npuede llevar al kernel a un interbloqueo.\n\n(Las funciones en sbi_ecall.c se excluyen del rastreo si CONFIG_RISCV_ALTERNATIVE_EARLY est\u00e1 configurado.)\n\n__sbi_ecall activa una instant\u00e1nea del ringbuffer. El c\u00f3digo de la instant\u00e1nea genera una interrupci\u00f3n IPI, lo que resulta en otra llamada a __sbi_ecall y otra instant\u00e1nea...\n\nTodo lo que se necesita para entrar en este bucle infinito es una __sbi_ecall inicial. En sistemas RISC-V sin la extensi\u00f3n SSTC, los eventos de reloj en timer-riscv.c emiten sbi ecalls peri\u00f3dicas, haciendo que el problema sea f\u00e1cil de activar.\n\nExcluir siempre las funciones de sbi_ecall.c del rastreo para corregir el interbloqueo potencial.\n\nLas sbi ecalls pueden registrarse f\u00e1cilmente a trav\u00e9s de eventos de rastreo, excluir las funciones ecall del rastreo de funciones no es una gran limitaci\u00f3n."}], "lastModified": "2026-03-18T17:36:43.673", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "20B10614-CE0D-494A-9FEA-F01A6985C9B7", "versionEndExcluding": "6.11", "versionStartIncluding": "6.10.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EA8A5D78-6E70-4B4A-802B-44FFB0543B56", "versionEndExcluding": "6.18.10", "versionStartIncluding": "6.11.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4770BA57-3F3F-493B-8608-EC3B25254949"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DE5298B3-04B4-4F3E-B186-01A58B5C75A6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}