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This holds\nrtnl_lock, and causes tasks to hang.\n\nReturn -EAGAIN to prevent infinite looping, while keeping documented\nbehavior.\n\n[1]\n\nINFO: task kworker/1:0:5088 blocked for more than 143 seconds.\nNot tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:kworker/1:0 state:D stack:23744 pid:5088 tgid:5088 ppid:2 flags:0x00004000\nWorkqueue: events_power_efficient reg_check_chans_work\nCall Trace:\n<TASK>\ncontext_switch kernel/sched/core.c:5409 [inline]\n__schedule+0xf15/0x5d00 kernel/sched/core.c:6746\n__schedule_loop kernel/sched/core.c:6823 [inline]\nschedule+0xe7/0x350 kernel/sched/core.c:6838\nschedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895\n__mutex_lock_common kernel/locking/mutex.c:684 [inline]\n__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752\nwiphy_lock include/net/cfg80211.h:5953 [inline]\nreg_leave_invalid_chans net/wireless/reg.c:2466 [inline]\nreg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/sched: act_api: corrige posible bucle infinito en tcf_idr_check_alloc() syzbot encontr\u00f3 tareas pendientes esperando en rtnl_lock [1] Hay un reproductor disponible en el error syzbot. Cuando se env\u00eda una solicitud para agregar varias acciones con el mismo \u00edndice, la segunda solicitud se bloquear\u00e1 para siempre en la primera solicitud. Esto retiene rtnl_lock y hace que las tareas se bloqueen. Devuelve -EAGAIN para evitar bucles infinitos y al mismo tiempo mantener el comportamiento documentado. [1] INFORMACI\u00d3N: tarea kworker/1:0:5088 bloqueada durante m\u00e1s de 143 segundos. No contaminado 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0 \"echo 0 &gt; /proc/sys/kernel/hung_task_timeout_secs\" desactiva este mensaje. tarea:kworker/1:0 estado:D pila:23744 pid:5088 tgid:5088 ppid:2 banderas:0x00004000 Cola de trabajo: events_power_ficient reg_check_chans_work Seguimiento de llamadas: context_switch kernel/sched/core.c:5409 [en l\u00ednea] __schedule+ 0xf15/0x5d00 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 programaci\u00f3n [en l\u00ednea]+0xe7/0x350 kernel/sched/core.c:6838 Schedule_preempt_disabled+0x13/0x30 kernel/sched/core. c:6895 __mutex_lock_common kernel/locking/mutex.c:684 [en l\u00ednea] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:5953 [en l\u00ednea] reg_leave_invalid_chans net/wireless/reg. c:2466 [en l\u00ednea] reg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481"}], "id": "CVE-2024-40995", "lastModified": "2025-11-03T22:17:21.340", "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": "2024-07-12T13:15:20.680", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/25987a97eec4d5f897cd04ee1b45170829c610da"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5f926aa96b08b6c47178fe1171e7ae331c695fc2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6fc78d67f51aeb9a542d39a8714e16bc411582d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7a0e497b597df7c4cf2b63fc6e9188b6cabe5335"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c6a7da65a296745535a964be1019ec7691b0cb90"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d864319871b05fadd153e0aede4811ca7008f5d6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/25987a97eec4d5f897cd04ee1b45170829c610da"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5f926aa96b08b6c47178fe1171e7ae331c695fc2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6fc78d67f51aeb9a542d39a8714e16bc411582d4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7a0e497b597df7c4cf2b63fc6e9188b6cabe5335"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c6a7da65a296745535a964be1019ec7691b0cb90"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d864319871b05fadd153e0aede4811ca7008f5d6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-835"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:7001", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:7000", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.22.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:6156", "cpe": "cpe:/o:redhat:rhel_aus:8.4", "package": "kernel-0:4.18.0-305.139.1.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support", "release_date": "2024-09-03T00:00:00Z"}, {"advisory": "RHSA-2024:6160", "cpe": "cpe:/a:redhat:rhel_tus:8.4::nfv", "package": "kernel-rt-0:4.18.0-305.139.1.rt7.215.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Telecommunications Update Service", "release_date": "2024-09-03T00:00:00Z"}, {"advisory": "RHSA-2024:6156", "cpe": "cpe:/o:redhat:rhel_tus:8.4", "package": "kernel-0:4.18.0-305.139.1.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Telecommunications Update Service", "release_date": "2024-09-03T00:00:00Z"}, {"advisory": "RHSA-2024:6156", "cpe": "cpe:/o:redhat:rhel_e4s:8.4", "package": "kernel-0:4.18.0-305.139.1.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions", "release_date": "2024-09-03T00:00:00Z"}, {"advisory": "RHSA-2024:6993", "cpe": "cpe:/o:redhat:rhel_eus:8.8", "package": "kernel-0:4.18.0-477.74.1.el8_8", "product_name": "Red Hat Enterprise Linux 8.8 Extended Update Support", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:8617", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.42.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-10-30T00:00:00Z"}, {"advisory": "RHSA-2024:8617", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.42.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-10-30T00:00:00Z"}, {"advisory": "RHSA-2024:6991", "cpe": "cpe:/a:redhat:rhel_e4s:9.0", "package": "kernel-0:5.14.0-70.117.1.el9_0", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:6990", "cpe": "cpe:/a:redhat:rhel_e4s:9.0::nfv", "package": "kernel-rt-0:5.14.0-70.117.1.rt21.189.el9_0", "product_name": "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:5672", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.80.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-08-21T00:00:00Z"}, {"advisory": "RHSA-2024:5673", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.80.1.rt14.365.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-08-21T00:00:00Z"}], "bugzilla": {"description": "kernel: net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()", "id": "2297579", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2297579"}, "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": "verified"}, "cwe": "CWE-833", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()\nsyzbot found hanging tasks waiting on rtnl_lock [1]\nA reproducer is available in the syzbot bug.\nWhen a request to add multiple actions with the same index is sent, the\nsecond request will block forever on the first request. This holds\nrtnl_lock, and causes tasks to hang.\nReturn -EAGAIN to prevent infinite looping, while keeping documented\nbehavior.\n[1]\nINFO: task kworker/1:0:5088 blocked for more than 143 seconds.\nNot tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:kworker/1:0 state:D stack:23744 pid:5088 tgid:5088 ppid:2 flags:0x00004000\nWorkqueue: events_power_efficient reg_check_chans_work\nCall Trace:\n<TASK>\ncontext_switch kernel/sched/core.c:5409 [inline]\n__schedule+0xf15/0x5d00 kernel/sched/core.c:6746\n__schedule_loop kernel/sched/core.c:6823 [inline]\nschedule+0xe7/0x350 kernel/sched/core.c:6838\nschedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895\n__mutex_lock_common kernel/locking/mutex.c:684 [inline]\n__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752\nwiphy_lock include/net/cfg80211.h:5953 [inline]\nreg_leave_invalid_chans net/wireless/reg.c:2466 [inline]\nreg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481"], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-40995", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-40995\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-40995\nhttps://lore.kernel.org/linux-cve-announce/2024071251-CVE-2024-40995-2a5c@gregkh/T"], "threat_severity": "Moderate"}