rhsa-2025:9393
Vulnerability from csaf_redhat
Published
2025-06-23 14:42
Modified
2025-07-29 08:15
Summary
Red Hat Security Advisory: kpatch-patch-5_14_0-570_17_1 security update

Notes

Topic
An update for kpatch-patch-5_14_0-570_17_1 is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. 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
This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel. This patch module is targeted for kernel-5.14.0-570.17.1.el9_6. Security Fix(es): * kernel: smb: client: fix UAF in decryption with multichannel (CVE-2025-37750) 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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  "vulnerabilities": [
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      "cve": "CVE-2025-37750",
      "cwe": {
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        "name": "Use After Free"
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      "discovery_date": "2025-05-01T00:00:00+00:00",
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          "category": "description",
          "text": "A use-after-free (UAF) vulnerability was found in the Linux kernel\u0027s SMB client functionality. A local attacker with permissions to connect to arbitrary SMB servers with precise timing could exploit this flaw to alter system memory, leading to denials of service, alteration of sensitive memory locations, or privilege escalation.",
          "title": "Vulnerability description"
        },
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          "text": "kernel: smb: client: fix UAF in decryption with multichannel",
          "title": "Vulnerability summary"
        },
        {
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          "text": "This vulnerability exists in how the SMB client manages cryptography for multi-channel connections. When using multi-channel connections, there is a possibility that a race condition will occur in separate threads. In that case, it is possible for one thread to free memory related to cryptography before another thread accesses it. An attacker could leverage that vulnerability to modify kernel memory, which could result in an escalation of privileges as well as potentially impacting system stability and integrity.\n\nThe changes in multichannel SMB client cryptography management that led to this vulnerability are not present in Red Hat Enterprise Linux prior to 9.6.",
          "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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          "summary": "https://lore.kernel.org/linux-cve-announce/2025050136-CVE-2025-37750-fdd8@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2025050136-CVE-2025-37750-fdd8@gregkh/T"
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          "date": "2025-06-23T14:42:14+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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            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
            "version": "3.1"
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            "BaseOS-9.6.0.Z.MAIN.EUS:kpatch-patch-5_14_0-570_17_1-debugsource-0:1-2.el9_6.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: smb: client: fix UAF in decryption with multichannel"
    }
  ]
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.