rlsa-2026:45116
Vulnerability from osv_rocky
Published
2026-07-27 06:01
Modified
2026-07-27 06:07
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: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O (CVE-2025-40026)

  • kernel: xfrm single-frag length not properly limited

  • kernel: dm log: fix out-of-bounds write due to region_count overflow (CVE-2026-53059)

  • kernel: tipc: fix double-free in tipc_buf_append() (CVE-2026-52993)

Severity
7.0 (High)
CVSS:3.1/AV:L/AC:H/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": "0:4.18.0-553.147.1.rt7.488.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "details": "The kernel-rt packages provide the Real Time Linux Kernel, which enables\nfine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: KVM: x86: Don\u0027t (re)check L1 intercepts when completing userspace I/O (CVE-2025-40026)\n\n* kernel: xfrm single-frag length not properly limited\n\n* kernel: dm log: fix out-of-bounds write due to region_count overflow (CVE-2026-53059)\n\n* kernel: tipc: fix double-free in tipc_buf_append() (CVE-2026-52993)",
  "id": "RLSA-2026:45116",
  "modified": "2026-07-27T06:07:56.935391Z",
  "published": "2026-07-27T06:01:43.153265Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:45116"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2406712"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492277"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492437"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: kernel-rt security update",
  "upstream": [
    "CVE-2025-40026",
    "CVE-2026-52993",
    "CVE-2026-53059"
  ]
}



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