rhsa-2025:17109
Vulnerability from csaf_redhat
Published
2025-09-30 17:24
Modified
2025-10-01 20:50
Summary
Red Hat Security Advisory: kernel-rt security update

Notes

Topic
An update for kernel-rt is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: ALSA: usb-audio: ALSA USB Audio Out-of-Bounds Bug (CVE-2022-48701) * kernel: net: usb: smsc75xx: Limit packet length to skb->len (CVE-2023-53125) * kernel: ALSA: bcd2000: Fix a UAF bug on the error path of probing (CVE-2022-50229) * kernel: md-raid10: fix KASAN warning (CVE-2022-50211) * kernel: i40e: fix MMIO write access to an invalid page in i40e_clear_hw (CVE-2025-38200) * kernel: net/sched: sch_qfq: Fix race condition on qfq_aggregate (CVE-2025-38477) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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          "category": "description",
          "text": "A flaw was found in the Linux kernel ALSA USB audio driver. This vulnerability allows a denial of service via a crafted USB audio device.",
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          "text": "kernel: ALSA: usb-audio: ALSA USB Audio Out-of-Bounds Bug",
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          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
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      "references": [
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          "summary": "Canonical URL",
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        },
        {
          "category": "external",
          "summary": "RHBZ#2278950",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2278950"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2022-48701",
          "url": "https://www.cve.org/CVERecord?id=CVE-2022-48701"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-48701",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48701"
        }
      ],
      "release_date": "2024-05-03T00:00:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2025-09-30T17:24:19+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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          "url": "https://access.redhat.com/errata/RHSA-2025:17109"
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      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "PHYSICAL",
            "availabilityImpact": "HIGH",
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H",
            "version": "3.1"
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          "category": "impact",
          "details": "Low"
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      ],
      "title": "kernel: ALSA: usb-audio: ALSA USB Audio Out-of-Bounds Bug"
    },
    {
      "cve": "CVE-2022-50211",
      "cwe": {
        "id": "CWE-823",
        "name": "Use of Out-of-range Pointer Offset"
      },
      "discovery_date": "2025-06-18T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2373662"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd-raid10: fix KASAN warning\n\nThere\u0027s a KASAN warning in raid10_remove_disk when running the lvm\ntest lvconvert-raid-reshape.sh. We fix this warning by verifying that the\nvalue \"number\" is valid.\n\nBUG: KASAN: slab-out-of-bounds in raid10_remove_disk+0x61/0x2a0 [raid10]\nRead of size 8 at addr ffff889108f3d300 by task mdX_raid10/124682\n\nCPU: 3 PID: 124682 Comm: mdX_raid10 Not tainted 5.19.0-rc6 #1\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x34/0x44\n print_report.cold+0x45/0x57a\n ? __lock_text_start+0x18/0x18\n ? raid10_remove_disk+0x61/0x2a0 [raid10]\n kasan_report+0xa8/0xe0\n ? raid10_remove_disk+0x61/0x2a0 [raid10]\n raid10_remove_disk+0x61/0x2a0 [raid10]\nBuffer I/O error on dev dm-76, logical block 15344, async page read\n ? __mutex_unlock_slowpath.constprop.0+0x1e0/0x1e0\n remove_and_add_spares+0x367/0x8a0 [md_mod]\n ? super_written+0x1c0/0x1c0 [md_mod]\n ? mutex_trylock+0xac/0x120\n ? _raw_spin_lock+0x72/0xc0\n ? _raw_spin_lock_bh+0xc0/0xc0\n md_check_recovery+0x848/0x960 [md_mod]\n raid10d+0xcf/0x3360 [raid10]\n ? sched_clock_cpu+0x185/0x1a0\n ? rb_erase+0x4d4/0x620\n ? var_wake_function+0xe0/0xe0\n ? psi_group_change+0x411/0x500\n ? preempt_count_sub+0xf/0xc0\n ? _raw_spin_lock_irqsave+0x78/0xc0\n ? __lock_text_start+0x18/0x18\n ? raid10_sync_request+0x36c0/0x36c0 [raid10]\n ? preempt_count_sub+0xf/0xc0\n ? _raw_spin_unlock_irqrestore+0x19/0x40\n ? del_timer_sync+0xa9/0x100\n ? try_to_del_timer_sync+0xc0/0xc0\n ? _raw_spin_lock_irqsave+0x78/0xc0\n ? __lock_text_start+0x18/0x18\n ? _raw_spin_unlock_irq+0x11/0x24\n ? __list_del_entry_valid+0x68/0xa0\n ? finish_wait+0xa3/0x100\n md_thread+0x161/0x260 [md_mod]\n ? unregister_md_personality+0xa0/0xa0 [md_mod]\n ? _raw_spin_lock_irqsave+0x78/0xc0\n ? prepare_to_wait_event+0x2c0/0x2c0\n ? unregister_md_personality+0xa0/0xa0 [md_mod]\n kthread+0x148/0x180\n ? kthread_complete_and_exit+0x20/0x20\n ret_from_fork+0x1f/0x30\n \u003c/TASK\u003e\n\nAllocated by task 124495:\n kasan_save_stack+0x1e/0x40\n __kasan_kmalloc+0x80/0xa0\n setup_conf+0x140/0x5c0 [raid10]\n raid10_run+0x4cd/0x740 [raid10]\n md_run+0x6f9/0x1300 [md_mod]\n raid_ctr+0x2531/0x4ac0 [dm_raid]\n dm_table_add_target+0x2b0/0x620 [dm_mod]\n table_load+0x1c8/0x400 [dm_mod]\n ctl_ioctl+0x29e/0x560 [dm_mod]\n dm_compat_ctl_ioctl+0x7/0x20 [dm_mod]\n __do_compat_sys_ioctl+0xfa/0x160\n do_syscall_64+0x90/0xc0\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nLast potentially related work creation:\n kasan_save_stack+0x1e/0x40\n __kasan_record_aux_stack+0x9e/0xc0\n kvfree_call_rcu+0x84/0x480\n timerfd_release+0x82/0x140\nL __fput+0xfa/0x400\n task_work_run+0x80/0xc0\n exit_to_user_mode_prepare+0x155/0x160\n syscall_exit_to_user_mode+0x12/0x40\n do_syscall_64+0x42/0xc0\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nSecond to last potentially related work creation:\n kasan_save_stack+0x1e/0x40\n __kasan_record_aux_stack+0x9e/0xc0\n kvfree_call_rcu+0x84/0x480\n timerfd_release+0x82/0x140\n __fput+0xfa/0x400\n task_work_run+0x80/0xc0\n exit_to_user_mode_prepare+0x155/0x160\n syscall_exit_to_user_mode+0x12/0x40\n do_syscall_64+0x42/0xc0\n entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThe buggy address belongs to the object at ffff889108f3d200\n which belongs to the cache kmalloc-256 of size 256\nThe buggy address is located 0 bytes to the right of\n 256-byte region [ffff889108f3d200, ffff889108f3d300)\n\nThe buggy address belongs to the physical page:\npage:000000007ef2a34c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1108f3c\nhead:000000007ef2a34c order:2 compound_mapcount:0 compound_pincount:0\nflags: 0x4000000000010200(slab|head|zone=2)\nraw: 4000000000010200 0000000000000000 dead000000000001 ffff889100042b40\nraw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n ffff889108f3d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff889108f3d280: 00 00\n---truncated---",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: md-raid10: fix KASAN warning",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2022-50211"
        },
        {
          "category": "external",
          "summary": "RHBZ#2373662",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373662"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2022-50211",
          "url": "https://www.cve.org/CVERecord?id=CVE-2022-50211"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-50211",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50211"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2025061843-CVE-2022-50211-393a@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2025061843-CVE-2022-50211-393a@gregkh/T"
        }
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          "date": "2025-09-30T17:24:19+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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      "scores": [
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          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.0,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "kernel: md-raid10: fix KASAN warning"
    },
    {
      "cve": "CVE-2022-50229",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "discovery_date": "2025-06-18T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2373460"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: bcd2000: Fix a UAF bug on the error path of probing\n\nWhen the driver fails in snd_card_register() at probe time, it will free\nthe \u0027bcd2k-\u003emidi_out_urb\u0027 before killing it, which may cause a UAF bug.\n\nThe following log can reveal it:\n\n[   50.727020] BUG: KASAN: use-after-free in bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000]\n[   50.727623] Read of size 8 at addr ffff88810fab0e88 by task swapper/4/0\n[   50.729530] Call Trace:\n[   50.732899]  bcd2000_input_complete+0x1f1/0x2e0 [snd_bcd2000]\n\nFix this by adding usb_kill_urb() before usb_free_urb().",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ALSA: bcd2000: Fix a UAF bug on the error path of probing",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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      "title": "kernel: i40e: fix MMIO write access to an invalid page in i40e_clear_hw"
    },
    {
      "cve": "CVE-2025-38477",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "discovery_date": "2025-07-28T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2383922"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_qfq: Fix race condition on qfq_aggregate\n\nA race condition can occur when \u0027agg\u0027 is modified in qfq_change_agg\n(called during qfq_enqueue) while other threads access it\nconcurrently. For example, qfq_dump_class may trigger a NULL\ndereference, and qfq_delete_class may cause a use-after-free.\n\nThis patch addresses the issue by:\n\n1. Moved qfq_destroy_class into the critical section.\n\n2. Added sch_tree_lock protection to qfq_dump_class and\nqfq_dump_class_stats.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net/sched: sch_qfq: Fix race condition on qfq_aggregate",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This patch fixes a race condition in the QFQ packet scheduler, where concurrent modification and access to cl-\u003eagg may result in a use-after-free or NULL pointer dereference.\nThe bug occurs when qfq_change_class() reassigns the agg pointer while other threads read it in qfq_dump_class() or qfq_delete_class().\nThe fix synchronizes access using sch_tree_lock() and reorders destruction logic to avoid concurrency issues.\nThis issue can be triggered locally by users with CAP_NET_ADMIN privileges and may lead to kernel crashes or denial-of-service.\nAlthough the vulnerability involves a use-after-free, it only results in stale reads of deallocated memory, used in netlink reporting functions.\nThere is no write primitive, function pointer corruption, or kernel state modification, making privilege escalation infeasible in this case.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-38477"
        },
        {
          "category": "external",
          "summary": "RHBZ#2383922",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2383922"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-38477",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-38477"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-38477",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38477"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2025072813-CVE-2025-38477-8b42@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2025072813-CVE-2025-38477-8b42@gregkh/T"
        }
      ],
      "release_date": "2025-07-28T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-09-30T17:24:19+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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        },
        {
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          "details": "To mitigate this issue, prevent module sch_qfq from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.",
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      "title": "kernel: net/sched: sch_qfq: Fix race condition on qfq_aggregate"
    }
  ]
}


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