CVE-2026-64123

🗓️ 19 Jul 2026 15:40:21Reported by LinuxType

Resolved race freeing HSR node table during read-copy-update by deferring with list_del_rcu and hsr_free_node_rcu.

Reporter	Title	Published	Views	Family All 10
ATTACKERKB	CVE-2026-64123	19 Jul 202615:40	–	attackerkb
Cvelist	CVE-2026-64123 net: hsr: defer node table free until after RCU readers	19 Jul 202615:40	–	cvelist
EUVD	EUVD-2026-45808	19 Jul 202615:40	–	euvd
NVD	CVE-2026-64123	19 Jul 202616:17	–	nvd
OSV	CVE-2026-64123 net: hsr: defer node table free until after RCU readers	19 Jul 202615:40	–	osv
OSV	DEBIAN-CVE-2026-64123	19 Jul 202616:17	–	osv
OSV	UBUNTU-CVE-2026-64123	20 Jul 202600:00	–	osv
Positive Technologies	PT-2026-61440	19 Jul 202600:00	–	ptsecurity
RedhatCVE	CVE-2026-64123	20 Jul 202607:54	–	redhatcve
Tenable Nessus	Linux Distros Unpatched Vulnerability : CVE-2026-64123	20 Jul 202600:00	–	nessus

Vulners

CNA

Node

linux linux_kernelRange5.2.12–5.3

linux linux_kernelRange5.3–5.10.259

linux linux_kernelRange5.11.0–5.15.210

linux linux_kernelRange5.16.0–6.1.176

linux linux_kernelRange6.2.0–6.6.143

linux linux_kernelRange6.7.0–6.12.93

linux linux_kernelRange6.13.0–7.0.11

linux linux_kernelRange7.1.0≥

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/hsr/hsr_framereg.c"
    ],
    "versions": [
      {
        "version": "b9a1e627405d68d475a3c1f35e685ccfb5bbe668",
        "lessThan": "0ea70fb46940620848c08d9d399455c9e82fecdb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b9a1e627405d68d475a3c1f35e685ccfb5bbe668",
        "lessThan": "8be6685cdd1255bcc85f9b59e4bfc313aefc5c1b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b9a1e627405d68d475a3c1f35e685ccfb5bbe668",
        "lessThan": "c5580114e0492bcd2e0a37613ed4c311e3fa3d4d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b9a1e627405d68d475a3c1f35e685ccfb5bbe668",
        "lessThan": "7713f4aafb577ff49fa67f0488d9c7dddc64d6ce",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b9a1e627405d68d475a3c1f35e685ccfb5bbe668",
        "lessThan": "6324423a8e6591f41a16c09a8f9a84e554ac147c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b9a1e627405d68d475a3c1f35e685ccfb5bbe668",
        "lessThan": "8c3af18bb0d7c921a5219194037509463eb2ffde",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b9a1e627405d68d475a3c1f35e685ccfb5bbe668",
        "lessThan": "aaec7096f9961eb223b5b149abe9495525c205d9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "08523d5a2f4a9e4202e00d282c164d453cabe2d2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5.2.12",
        "lessThan": "5.3",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/hsr/hsr_framereg.c"
    ],
    "versions": [
      {
        "version": "5.3",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.3",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.259",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.210",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.176",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.143",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.93",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.11",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/0ea70fb46940620848c08d9d399455c9e82fecdb
git	www.git.kernel.org/stable/c/8c3af18bb0d7c921a5219194037509463eb2ffde
git	www.git.kernel.org/stable/c/aaec7096f9961eb223b5b149abe9495525c205d9
git	www.git.kernel.org/stable/c/8be6685cdd1255bcc85f9b59e4bfc313aefc5c1b
git	www.git.kernel.org/stable/c/7713f4aafb577ff49fa67f0488d9c7dddc64d6ce
git	www.git.kernel.org/stable/c/c5580114e0492bcd2e0a37613ed4c311e3fa3d4d
git	www.git.kernel.org/stable/c/6324423a8e6591f41a16c09a8f9a84e554ac147c

20 Jul 2026 15:17Current

5.4Medium risk

Vulners AI Score5.4

CVSS 3.17.8

EPSS0.00172