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RHSA-2025:21082

Vulnerability from csaf_redhat - Published: 2025-11-12 04:28 - Updated: 2026-09-13 18:16
Summary
Red Hat Security Advisory: kernel-rt security update
Severity
Moderate
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.
CVE-2022-48978

A flaw was found in the Linux kernel's Human Interface Device (HID) core. A local attacker with low privileges could exploit a shift-out-of-bounds vulnerability in the `hid_report_raw_event` function. This occurs when the size of an integer in the `snto32()` function exceeds 32 bits, leading to an invalid shift operation. Successful exploitation of this vulnerability could result in a system crash, causing a denial of service.

7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-125 - Out-of-bounds Read
Affected products
Product Identifier Version Remediation
Unresolved product id: 7Server-RT-ELS:kernel-rt-0:3.10.0-1160.142.1.rt56.1294.el7.src —
Vendor Fix fix
Workaround
Unresolved product id: 7Server-RT-ELS:kernel-rt-0:3.10.0-1160.142.1.rt56.1294.el7.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: 7Server-RT-ELS:kernel-rt-debug-0:3.10.0-1160.142.1.rt56.1294.el7.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: 7Server-RT-ELS:kernel-rt-debug-debuginfo-0:3.10.0-1160.142.1.rt56.1294.el7.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: 7Server-RT-ELS:kernel-rt-debug-devel-0:3.10.0-1160.142.1.rt56.1294.el7.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: 7Server-RT-ELS:kernel-rt-debuginfo-0:3.10.0-1160.142.1.rt56.1294.el7.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: 7Server-RT-ELS:kernel-rt-debuginfo-common-x86_64-0:3.10.0-1160.142.1.rt56.1294.el7.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: 7Server-RT-ELS:kernel-rt-devel-0:3.10.0-1160.142.1.rt56.1294.el7.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: 7Server-RT-ELS:kernel-rt-doc-0:3.10.0-1160.142.1.rt56.1294.el7.noarch —
Vendor Fix fix
Workaround
Unresolved product id: 7Server-RT-ELS:kernel-rt-trace-0:3.10.0-1160.142.1.rt56.1294.el7.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: 7Server-RT-ELS:kernel-rt-trace-debuginfo-0:3.10.0-1160.142.1.rt56.1294.el7.x86_64 —
Vendor Fix fix
Workaround
Unresolved product id: 7Server-RT-ELS:kernel-rt-trace-devel-0:3.10.0-1160.142.1.rt56.1294.el7.x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Moderate
CVE-2023-53373

In the Linux kernel, the following vulnerability has been resolved: crypto: seqiv - Handle EBUSY correctly As it is seqiv only handles the special return value of EINPROGERSS, which means that in all other cases it will free data related to the request. However, as the caller of seqiv may specify MAY_BACKLOG, we also need to expect EBUSY and treat it in the same way. Otherwise backlogged requests will trigger a use-after-free.

7.1 (High)
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 - Use After Free
Affected products
Fixed 12 products, the same list as for CVE-2022-48978
Threats
Impact Moderate
CVE-2025-22026

In the Linux kernel, the following vulnerability has been resolved: nfsd: don't ignore the return code of svc_proc_register() Currently, nfsd_proc_stat_init() ignores the return value of svc_proc_register(). If the procfile creation fails, then the kernel will WARN when it tries to remove the entry later. Fix nfsd_proc_stat_init() to return the same type of pointer as svc_proc_register(), and fix up nfsd_net_init() to check that and fail the nfsd_net construction if it occurs. svc_proc_register() can fail if the dentry can't be allocated, or if an identical dentry already exists. The second case is pretty unlikely in the nfsd_net construction codepath, so if this happens, return -ENOMEM.

7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-252 - Unchecked Return Value
Affected products
Fixed 12 products, the same list as for CVE-2022-48978
Threats
Impact Moderate
CVE-2025-37797

In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a UAF vulnerability in class handling This patch fixes a Use-After-Free vulnerability in the HFSC qdisc class handling. The issue occurs due to a time-of-check/time-of-use condition in hfsc_change_class() when working with certain child qdiscs like netem or codel. The vulnerability works as follows: 1. hfsc_change_class() checks if a class has packets (q.qlen != 0) 2. It then calls qdisc_peek_len(), which for certain qdiscs (e.g., codel, netem) might drop packets and empty the queue 3. The code continues assuming the queue is still non-empty, adding the class to vttree 4. This breaks HFSC scheduler assumptions that only non-empty classes are in vttree 5. Later, when the class is destroyed, this can lead to a Use-After-Free The fix adds a second queue length check after qdisc_peek_len() to verify the queue wasn't emptied.

7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 - Use After Free
Affected products
Fixed 12 products, the same list as for CVE-2022-48978
Threats
Impact Moderate
CVE-2025-38556

In the Linux kernel, the following vulnerability has been resolved: HID: core: Harden s32ton() against conversion to 0 bits Testing by the syzbot fuzzer showed that the HID core gets a shift-out-of-bounds exception when it tries to convert a 32-bit quantity to a 0-bit quantity. Ideally this should never occur, but there are buggy devices and some might have a report field with size set to zero; we shouldn't reject the report or the device just because of that. Instead, harden the s32ton() routine so that it returns a reasonable result instead of crashing when it is called with the number of bits set to 0 -- the same as what snto32() does.

7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-125 - Out-of-bounds Read
Affected products
Fixed 12 products, the same list as for CVE-2022-48978
Threats
Impact Moderate
CVE-2025-39751

This CVE has been marked as Rejected by the assigning CNA.

0.0 (None)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:N
CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Affected products
Fixed 12 products, the same list as for CVE-2022-48978
References
URL Category
https://access.redhat.com/errata/RHSA-2025:21082 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=2320665 external
https://bugzilla.redhat.com/show_bug.cgi?id=2360224 external
https://bugzilla.redhat.com/show_bug.cgi?id=2363672 external
https://bugzilla.redhat.com/show_bug.cgi?id=2389456 external
https://bugzilla.redhat.com/show_bug.cgi?id=2394624 external
https://bugzilla.redhat.com/show_bug.cgi?id=2396379 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2022-48978 self
https://bugzilla.redhat.com/show_bug.cgi?id=2320665 external
https://www.cve.org/CVERecord?id=CVE-2022-48978 external
https://nvd.nist.gov/vuln/detail/CVE-2022-48978 external
https://lore.kernel.org/linux-cve-announce/202410… external
https://access.redhat.com/security/cve/CVE-2023-53373 self
https://bugzilla.redhat.com/show_bug.cgi?id=2396379 external
https://www.cve.org/CVERecord?id=CVE-2023-53373 external
https://nvd.nist.gov/vuln/detail/CVE-2023-53373 external
https://lore.kernel.org/linux-cve-announce/202509… external
https://access.redhat.com/security/cve/CVE-2025-22026 self
https://bugzilla.redhat.com/show_bug.cgi?id=2360224 external
https://www.cve.org/CVERecord?id=CVE-2025-22026 external
https://nvd.nist.gov/vuln/detail/CVE-2025-22026 external
https://lore.kernel.org/linux-cve-announce/202504… external
https://access.redhat.com/security/cve/CVE-2025-37797 self
https://bugzilla.redhat.com/show_bug.cgi?id=2363672 external
https://www.cve.org/CVERecord?id=CVE-2025-37797 external
https://nvd.nist.gov/vuln/detail/CVE-2025-37797 external
https://lore.kernel.org/linux-cve-announce/202505… external
https://access.redhat.com/security/cve/CVE-2025-38556 self
https://bugzilla.redhat.com/show_bug.cgi?id=2389456 external
https://www.cve.org/CVERecord?id=CVE-2025-38556 external
https://nvd.nist.gov/vuln/detail/CVE-2025-38556 external
https://lore.kernel.org/linux-cve-announce/202508… external
https://access.redhat.com/security/cve/CVE-2025-39751 self
https://bugzilla.redhat.com/show_bug.cgi?id=2394624 external
https://www.cve.org/CVERecord?id=CVE-2025-39751 external
https://nvd.nist.gov/vuln/detail/CVE-2025-39751 external
https://lore.kernel.org/linux-cve-announce/202509… external
To clipboard 

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          "title": "Vulnerability description"
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    {
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      "cwe": {
        "id": "CWE-125",
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          "title": "Vulnerability description"
        },
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          "text": "kernel: HID: core: Harden s32ton() against conversion to 0 bits",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "HID core could crash on malformed devices that define a 0-bit report field, causing a shift-out-of-bounds in s32ton(). Exploitation requires only connecting a malicious HID device (no privileges or user interaction), leading to kernel crash.",
          "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: Linux kernel ALSA hda/ca0132 buffer overflow"
    }
  ]
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.