CVE-2026-90209

🗓️ 17 Sep 2026 16:07:24Reported by LinuxType

cve🔗 web.nvd.nist.gov👁 8 Views🌐 WEB

Deadlock in Linux kernel s390/debug during unregister while debugfs file is being written to.

Reporter	Title	Published	Views	Family All 9
Cvelist	CVE-2026-90209 s390/debug: Fix deadlock during unregister	17 Sep 202616:07	–	cvelist
Debian CVE	CVE-2026-90209	17 Sep 202616:07	–	debiancve
EUVD	EUVD-2026-81802	17 Sep 202616:07	–	euvd
NVD	CVE-2026-90209	17 Sep 202617:17	–	nvd
OSV	AZL-102368 CVE-2026-90209 affecting package kernel 6.6.150.1-1	17 Sep 202617:17	–	osv
OSV	BELL-CVE-2026-90209	19 Sep 202606:06	–	osv
OSV	DEBIAN-CVE-2026-90209	17 Sep 202617:17	–	osv
OSV	UBUNTU-CVE-2026-90209	18 Sep 202600:00	–	osv
Tenable Nessus	Linux Distros Unpatched Vulnerability : CVE-2026-90209	18 Sep 202600:00	–	nessus

Vulners

CNA

Node

linux linux_kernelRange5.4.146–5.5

linux linux_kernelRange5.10.65–5.11

linux linux_kernelRange5.13.17–5.14

linux linux_kernelRange5.14.4–5.15

linux linux_kernelRange5.15–5.15.221

linux linux_kernelRange5.16.0–6.1.188

linux linux_kernelRange6.2.0–6.6.157

linux linux_kernelRange6.7.0–6.12.110

linux linux_kernelRange6.13.0–6.18.52

linux linux_kernelRange6.19.0–7.2.6

linux linux_kernelRange7.3.0–7.3-rc1

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/s390/kernel/debug.c"
    ],
    "versions": [
      {
        "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
        "lessThan": "a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
        "lessThan": "183f8f6d64bb0510070c856b9927618c53014a7b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
        "lessThan": "a08b70ed2d1ec907353a72f15163b8e34ff4b2f8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
        "lessThan": "45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
        "lessThan": "5d83f3faa3fb7f23f298cfd40382611999de5d1d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
        "lessThan": "54e1259b75d6402a1d0cfb822b9bb2c507e53dab",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "9372a82892c2caa6bccab9a4081166fa769699f8",
        "lessThan": "445c31ac638fd1af203d79bdf25fc0cb3149fbbc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c68ba4a708fbd0efdc384cd29250bb292a45e559",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "86f9980909f31ab205323eeeb290fe3cbb4952b4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "fe5793e90d3f572a87ba67fe2f0e1679fdff14f8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e234f66168f0d50c0d28154fb983a14e85c3c526",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5.4.146",
        "lessThan": "5.5",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "5.10.65",
        "lessThan": "5.11",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "5.13.17",
        "lessThan": "5.14",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "5.14.4",
        "lessThan": "5.15",
        "status": "affected",
        "versionType": "semver"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/s390/kernel/debug.c"
    ],
    "versions": [
      {
        "version": "5.15",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.15",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.221",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.188",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.157",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.110",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.52",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.6",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/445c31ac638fd1af203d79bdf25fc0cb3149fbbc
git	www.git.kernel.org/stable/c/183f8f6d64bb0510070c856b9927618c53014a7b
git	www.git.kernel.org/stable/c/45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba
git	www.git.kernel.org/stable/c/a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed
git	www.git.kernel.org/stable/c/54e1259b75d6402a1d0cfb822b9bb2c507e53dab
git	www.git.kernel.org/stable/c/a08b70ed2d1ec907353a72f15163b8e34ff4b2f8
git	www.git.kernel.org/stable/c/5d83f3faa3fb7f23f298cfd40382611999de5d1d

Parameter	Position	Path	Description	CWE
vmur	path	vmur/level	Unregistering an s390dbf debug area can deadlock when a debugfs file is being written to; fix splits unregister into parts and locks only the s390dbf part.
level	path	vmur/level	Unregistering an s390dbf debug area can deadlock when a debugfs file is being written to; fix splits unregister into parts and locks only the s390dbf part.

17 Sep 2026 17:17Current

EPSS0.00206