rhsa-2025:21082
Vulnerability from csaf_redhat
Published
2025-11-12 04:28
Modified
2025-11-12 16:38
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: HID: core: fix shift-out-of-bounds in hid_report_raw_event (CVE-2022-48978) * kernel: nfsd: don't ignore the return code of svc_proc_register() (CVE-2025-22026) * kernel: net_sched: hfsc: Fix a UAF vulnerability in class handling (CVE-2025-37797) * kernel: HID: core: Harden s32ton() against conversion to 0 bits (CVE-2025-38556) * kernel: ALSA: hda/ca0132: Fix buffer overflow in add_tuning_control (CVE-2025-39751) * kernel: crypto: seqiv - Handle EBUSY correctly (CVE-2023-53373) 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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          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: core: fix shift-out-of-bounds in hid_report_raw_event\n\nSyzbot reported shift-out-of-bounds in hid_report_raw_event.\n\nmicrosoft 0003:045E:07DA.0001: hid_field_extract() called with n (128) \u003e\n32! (swapper/0)\n======================================================================\nUBSAN: shift-out-of-bounds in drivers/hid/hid-core.c:1323:20\nshift exponent 127 is too large for 32-bit type \u0027int\u0027\nCPU: 0 PID: 0 Comm: swapper/0 Not tainted\n6.1.0-rc4-syzkaller-00159-g4bbf3422df78 #0\nHardware name: Google Compute Engine/Google Compute Engine, BIOS\nGoogle 10/26/2022\nCall Trace:\n \u003cIRQ\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106\n ubsan_epilogue lib/ubsan.c:151 [inline]\n __ubsan_handle_shift_out_of_bounds+0x3a6/0x420 lib/ubsan.c:322\n snto32 drivers/hid/hid-core.c:1323 [inline]\n hid_input_fetch_field drivers/hid/hid-core.c:1572 [inline]\n hid_process_report drivers/hid/hid-core.c:1665 [inline]\n hid_report_raw_event+0xd56/0x18b0 drivers/hid/hid-core.c:1998\n hid_input_report+0x408/0x4f0 drivers/hid/hid-core.c:2066\n hid_irq_in+0x459/0x690 drivers/hid/usbhid/hid-core.c:284\n __usb_hcd_giveback_urb+0x369/0x530 drivers/usb/core/hcd.c:1671\n dummy_timer+0x86b/0x3110 drivers/usb/gadget/udc/dummy_hcd.c:1988\n call_timer_fn+0xf5/0x210 kernel/time/timer.c:1474\n expire_timers kernel/time/timer.c:1519 [inline]\n __run_timers+0x76a/0x980 kernel/time/timer.c:1790\n run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803\n __do_softirq+0x277/0x75b kernel/softirq.c:571\n __irq_exit_rcu+0xec/0x170 kernel/softirq.c:650\n irq_exit_rcu+0x5/0x20 kernel/softirq.c:662\n sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1107\n======================================================================\n\nIf the size of the integer (unsigned n) is bigger than 32 in snto32(),\nshift exponent will be too large for 32-bit type \u0027int\u0027, resulting in a\nshift-out-of-bounds bug.\nFix this by adding a check on the size of the integer (unsigned n) in\nsnto32(). To add support for n greater than 32 bits, set n to 32, if n\nis greater than 32.",
          "title": "Vulnerability description"
        },
        {
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          "text": "kernel: HID: core: fix shift-out-of-bounds in hid_report_raw_event",
          "title": "Vulnerability summary"
        },
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          "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"
        }
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      "title": "kernel: HID: core: fix shift-out-of-bounds in hid_report_raw_event"
    },
    {
      "cve": "CVE-2023-53373",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "discovery_date": "2025-09-18T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2396379"
        }
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      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: seqiv - Handle EBUSY correctly\n\nAs it is seqiv only handles the special return value of EINPROGERSS,\nwhich means that in all other cases it will free data related to the\nrequest.\n\nHowever, as the caller of seqiv may specify MAY_BACKLOG, we also need\nto expect EBUSY and treat it in the same way.  Otherwise backlogged\nrequests will trigger a use-after-free.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: crypto: seqiv - Handle EBUSY correctly",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "The flaw is in the seqiv IV generator and can lead to a use-after-free when backlogged crypto requests return -EBUSY. Triggering it is easier locally by flooding the kernel crypto API (e.g. via AF_ALG or many concurrent AEAD requests) because the attacker must create backlog conditions. Remote triggering is much harder and only realistic for specific configurations (for example an in-kernel IPsec/TLS path that uses seqiv for AEAD). In practice this means an unprivileged local user with access to the kernel crypto interface is the most likely threat vector, while a remote attacker would need the target to both use seqiv and be inducible into heavy crypto backlog.",
          "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"
        }
      ],
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      "title": "kernel: crypto: seqiv - Handle EBUSY correctly"
    },
    {
      "cve": "CVE-2025-22026",
      "cwe": {
        "id": "CWE-252",
        "name": "Unchecked Return Value"
      },
      "discovery_date": "2025-04-16T00:00:00+00:00",
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        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: don\u0027t ignore the return code of svc_proc_register()\n\nCurrently, nfsd_proc_stat_init() ignores the return value of\nsvc_proc_register(). If the procfile creation fails, then the kernel\nwill WARN when it tries to remove the entry later.\n\nFix nfsd_proc_stat_init() to return the same type of pointer as\nsvc_proc_register(), and fix up nfsd_net_init() to check that and fail\nthe nfsd_net construction if it occurs.\n\nsvc_proc_register() can fail if the dentry can\u0027t be allocated, or if an\nidentical dentry already exists. The second case is pretty unlikely in\nthe nfsd_net construction codepath, so if this happens, return -ENOMEM.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: nfsd: don\u0027t ignore the return code of svc_proc_register()",
          "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"
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          "title": "Vulnerability description"
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            "confidentialityImpact": "HIGH",
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            "userInteraction": "NONE",
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    {
      "cve": "CVE-2025-39751",
      "cwe": {
        "id": "CWE-120",
        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
      },
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      "notes": [
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          "title": "Vulnerability description"
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      "title": "kernel: ALSA: hda/ca0132: Fix buffer overflow in add_tuning_control"
    }
  ]
}


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