CVE-2026-31505

{"id": "CVE-2026-31505", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31505", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:10:20.590718Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "64430f70ba6fcd5872ac190f4ae3ddee3f48f00d", "lessThan": "20a31b84b3e3af21bbb2628fdad185b1f274a5f5", "versionType": "git"}, {"status": "affected", "version": "64430f70ba6fcd5872ac190f4ae3ddee3f48f00d", "lessThan": "d5dcca707f56c46582486d783c1eca2323189111", "versionType": "git"}, {"status": "affected", "version": "64430f70ba6fcd5872ac190f4ae3ddee3f48f00d", "lessThan": "1f931dee5b726df1940348ec31614d64bac03aa6", "versionType": "git"}, {"status": "affected", "version": "64430f70ba6fcd5872ac190f4ae3ddee3f48f00d", "lessThan": "bb85741d2dc2be207353a412f51b83697fcbefcf", "versionType": "git"}, {"status": "affected", "version": "64430f70ba6fcd5872ac190f4ae3ddee3f48f00d", "lessThan": "fdf902bf86a80bf15792a1d20a67a5302498d7f1", "versionType": "git"}, {"status": "affected", "version": "64430f70ba6fcd5872ac190f4ae3ddee3f48f00d", "lessThan": "fecacfc95f195b99c71c579a472120d0b4ed65fa", "versionType": "git"}], "programFiles": ["drivers/net/ethernet/intel/iavf/iavf_ethtool.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.17"}, {"status": "unaffected", "version": "0", "lessThan": "5.17", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.191", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.160", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.80", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.21", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.11", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ethernet/intel/iavf/iavf_ethtool.c"], "defaultStatus": "affected"}]}], "published": "2026-04-22T14:16:49.233", "references": [{"url": "https://git.kernel.org/stable/c/1f931dee5b726df1940348ec31614d64bac03aa6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/20a31b84b3e3af21bbb2628fdad185b1f274a5f5", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bb85741d2dc2be207353a412f51b83697fcbefcf", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d5dcca707f56c46582486d783c1eca2323189111", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fdf902bf86a80bf15792a1d20a67a5302498d7f1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fecacfc95f195b99c71c579a472120d0b4ed65fa", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niavf: fix out-of-bounds writes in iavf_get_ethtool_stats()\n\niavf incorrectly uses real_num_tx_queues for ETH_SS_STATS. Since the\nvalue could change in runtime, we should use num_tx_queues instead.\n\nMoreover iavf_get_ethtool_stats() uses num_active_queues while\niavf_get_sset_count() and iavf_get_stat_strings() use\nreal_num_tx_queues, which triggers out-of-bounds writes when we do\n\"ethtool -L\" and \"ethtool -S\" simultaneously [1].\n\nFor example when we change channels from 1 to 8, Thread 3 could be\nscheduled before Thread 2, and out-of-bounds writes could be triggered\nin Thread 3:\n\nThread 1 (ethtool -L) Thread 2 (work) Thread 3 (ethtool -S)\niavf_set_channels()\n...\niavf_alloc_queues()\n-> num_active_queues = 8\niavf_schedule_finish_config()\n iavf_get_sset_count()\n real_num_tx_queues: 1\n -> buffer for 1 queue\n iavf_get_ethtool_stats()\n num_active_queues: 8\n -> out-of-bounds!\n iavf_finish_config()\n -> real_num_tx_queues = 8\n\nUse immutable num_tx_queues in all related functions to avoid the issue.\n\n[1]\n BUG: KASAN: vmalloc-out-of-bounds in iavf_add_one_ethtool_stat+0x200/0x270\n Write of size 8 at addr ffffc900031c9080 by task ethtool/5800\n\n CPU: 1 UID: 0 PID: 5800 Comm: ethtool Not tainted 6.19.0-enjuk-08403-g8137e3db7f1c #241 PREEMPT(full)\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n Call Trace:\n <TASK>\n dump_stack_lvl+0x6f/0xb0\n print_report+0x170/0x4f3\n kasan_report+0xe1/0x180\n iavf_add_one_ethtool_stat+0x200/0x270\n iavf_get_ethtool_stats+0x14c/0x2e0\n __dev_ethtool+0x3d0c/0x5830\n dev_ethtool+0x12d/0x270\n dev_ioctl+0x53c/0xe30\n sock_do_ioctl+0x1a9/0x270\n sock_ioctl+0x3d4/0x5e0\n __x64_sys_ioctl+0x137/0x1c0\n do_syscall_64+0xf3/0x690\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n RIP: 0033:0x7f7da0e6e36d\n ...\n </TASK>\n\n The buggy address belongs to a 1-page vmalloc region starting at 0xffffc900031c9000 allocated at __dev_ethtool+0x3cc9/0x5830\n The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000\n index:0xffff88813a013de0 pfn:0x13a013\n flags: 0x200000000000000(node=0|zone=2)\n raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000\n raw: ffff88813a013de0 0000000000000000 00000001ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n Memory state around the buggy address:\n ffffc900031c8f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ffffc900031c9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n >ffffc900031c9080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ^\n ffffc900031c9100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ffffc900031c9180: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\niavf: correcci\u00f3n de escrituras fuera de l\u00edmites en iavf_get_ethtool_stats()\n\niavf utiliza incorrectamente real_num_tx_queues para ETH_SS_STATS. Dado que el valor podr\u00eda cambiar en tiempo de ejecuci\u00f3n, deber\u00edamos usar num_tx_queues en su lugar.\n\nAdem\u00e1s, iavf_get_ethtool_stats() utiliza num_active_queues mientras que iavf_get_sset_count() y iavf_get_stat_strings() utilizan real_num_tx_queues, lo que desencadena escrituras fuera de l\u00edmites cuando ejecutamos \u2019ethtool -L\u2019 y \u2019ethtool -S\u2019 simult\u00e1neamente [1].\n\nPor ejemplo, cuando cambiamos los canales de 1 a 8, el Hilo 3 podr\u00eda ser programado antes que el Hilo 2, y se podr\u00edan desencadenar escrituras fuera de l\u00edmites en el Hilo 3:\n\nHilo 1 (ethtool -L) Hilo 2 (trabajo) Hilo 3 (ethtool -S)\niavf_set_channels()\n...\niavf_alloc_queues()\n -> num_active_queues = 8\niavf_schedule_finish_config()\n iavf_get_sset_count()\n real_num_tx_queues: 1\n -> b\u00fafer para 1 cola\n iavf_get_ethtool_stats()\n num_active_queues: 8\n -> \u00a1fuera de l\u00edmites!\n iavf_finish_config()\n -> real_num_tx_queues = 8\n\nUsar num_tx_queues inmutable en todas las funciones relacionadas para evitar el problema.\n\n[1]\n BUG: KASAN: vmalloc-out-of-bounds en iavf_add_one_ethtool_stat+0x200/0x270\n Escritura de tama\u00f1o 8 en la direcci\u00f3n ffffc900031c9080 por la tarea ethtool/5800\n\n CPU: 1 UID: 0 PID: 5800 Comm: ethtool Not tainted 6.19.0-enjuk-08403-g8137e3db7f1c #241 PREEMPT(full)\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n Traza de Llamadas:\n [TAREA]\n dump_stack_lvl+0x6f/0xb0\n print_report+0x170/0x4f3\n kasan_report+0xe1/0x180\n iavf_add_one_ethtool_stat+0x200/0x270\n iavf_get_ethtool_stats+0x14c/0x2e0\n __dev_ethtool+0x 3d0c/0x 5830\n dev_ethtool+0x12d/0x270\n dev_ioctl+0x53c/0xe30\n sock_do_ioctl+0x1a9/0x270\n sock_ioctl+0x3d4/0x5e0\n __x64_sys_ioctl+0x137/0x1c0\n do_syscall_64+0xf3/0x690\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n RIP: 0033:0x 7f7da0e6e36d\n ...\n [/TAREA]\n\n La direcci\u00f3n err\u00f3nea pertenece a una regi\u00f3n vmalloc de 1 p\u00e1gina que comienza en 0x ffffc900031c9000 asignada en __dev_ethtool+0x 3cc9/0x 5830\n La direcci\u00f3n err\u00f3nea pertenece a la p\u00e1gina f\u00edsica: page: refcount:1 mapcount:0 mapping:0000000000000000\n index:0x ffff88813a013de0 pfn:0x 13a013\n flags: 0x 200000000000000(node=0|zone=2)\n raw: 0200000000000000 0000000000000000 dead000000000122 0000000000000000\n raw: ffff88813a013de0 0000000000000000 00000001ffffffff 0000000000000000\n p\u00e1gina volcada porque: kasan: acceso incorrecto detectado\n\n Estado de la memoria alrededor de la direcci\u00f3n err\u00f3nea:\n ffffc900031c8f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ffffc900031c9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n >ffffc900031c9080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ^\n ffffc900031c9100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ffffc900031c9180: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8"}], "lastModified": "2026-11-11T23:10:00.263", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "803A2BAF-5A16-46AC-B6F6-5128B48C13FF", "versionEndExcluding": "6.12.80", "versionStartIncluding": "5.17.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ED39847A-3B46-4729-B7CA-B2C30B9FA8FE", "versionEndExcluding": "6.18.21", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4CA2E747-A9EC-4518-9AA2-B4247FC748B7", "versionEndExcluding": "6.19.11", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.17:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A59F7FD3-F505-48BD-8875-F07A33F42F6C"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}