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CVE-2026-52940

🗓️ 24 Jun 2026 07:14:29Reported by LinuxType 
cve
 cve
🔗 web.nvd.nist.gov👁 13 Views

CVE-2026-52940 fixes zeroing of the vnet header in tun_put_user to prevent leaking kernel stack.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-52940
24 Jun 202607:14
attackerkb
Chainguard
CVE-2026-52940 vulnerabilities
9 Jul 202620:31
cgr
Circl
CVE-2026-52940
24 Jun 202608:38
circl
Cvelist
CVE-2026-52940 tun: zero the whole vnet header in tun_put_user()
24 Jun 202607:14
cvelist
Debian CVE
CVE-2026-52940
24 Jun 202607:14
debiancve
EUVD
EUVD-2026-38710
24 Jun 202607:14
euvd
NVD
CVE-2026-52940
24 Jun 202608:16
nvd
OSV
BELL-CVE-2026-52940
25 Jun 202606:11
osv
OSV
CGA-VHVJ-RV7P-25JR
9 Jul 202619:07
osv
OSV
CVE-2026-52940 tun: zero the whole vnet header in tun_put_user()
24 Jun 202607:14
osv
Rows per page
NVD
Vulners
CNA
Node
linuxlinux_kernelRange6.176.18.36
OR
linuxlinux_kernelRange6.197.0.13
OROROROROROROR
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/tun.c"
    ],
    "versions": [
      {
        "version": "288f30435132d2f9e7a29ec9b9745a4f9dc7fd37",
        "lessThan": "5fd1fa5a4254bfdd70571c77f5e3bcb4e43738d5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "288f30435132d2f9e7a29ec9b9745a4f9dc7fd37",
        "lessThan": "585cb85e9a29185be05f326369573c2663cf4380",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "288f30435132d2f9e7a29ec9b9745a4f9dc7fd37",
        "lessThan": "7f2fcff15e99bb852f6967396ed12b38376e2c8d",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/tun.c"
    ],
    "versions": [
      {
        "version": "6.17",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.17",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.36",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.13",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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08 Jul 2026 19:12Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.5
EPSS0.00112
13