RLSA-2026:77500 (CVE-2026-64115)

Vulnerability from osv_rocky – Published: 2026-10-09 06:05 – Updated: 2026-10-09 12:15 – Source website
VLAI
Summary
Important: kernel-rt security update
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: vsock/vmci: fix UAF when peer resets connection during handshake (CVE-2026-64115)

  • kernel: packet: use consistent hard_header_len in non-ring send paths ()

  • kernel: packet: use consistent hard_header_len in non-ring send paths (CVE-2026-74582)

  • kernel: svcrdma: Reject inline replies that overflow the pull-up buffer (CVE-2026-89530)

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.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Credits
Rocky Enterprise Software Foundation
Red Hat
References
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:8",
        "name": "kernel-rt",
        "purl": "pkg:rpm/rocky-linux/kernel-rt?distro=rocky-linux-8\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "NFV"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:4.18.0-553.172.1.rt7.513.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "database_specific": {
    "license": "CC-BY-4.0",
    "license_url": "https://creativecommons.org/licenses/by/4.0/",
    "source_advisory": "RHSA-2026:77500"
  },
  "details": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: vsock/vmci: fix UAF when peer resets connection during handshake (CVE-2026-64115)\n\n* kernel: packet: use consistent hard_header_len in non-ring send paths ()\n\n* kernel: packet: use consistent hard_header_len in non-ring send paths (CVE-2026-74582)\n\n* kernel: svcrdma: Reject inline replies that overflow the pull-up buffer (CVE-2026-89530)\n\nFor 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.",
  "id": "RLSA-2026:77500",
  "modified": "2026-10-09T12:15:39.656984Z",
  "published": "2026-10-09T06:05:01.253377Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:77500"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502593"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519475"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532218"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:77500"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: kernel-rt security update",
  "upstream": [
    "CVE-2026-64115",
    "CVE-2026-74582",
    "CVE-2026-89530"
  ]
}



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