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CVE-2026-89563 ip6_tunnel: use skb_cow_head() in ip6_tnl_xmit()

🗓️ 11 Sep 2026 19:44:34Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 13 Views

Linux kernel ip6_tunnel double free of skb when ip6_tnl_xmit() reallocates headroom and later fails.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-89563
12 Sep 202600:27
circl
cve
CVE
CVE-2026-89563
11 Sep 202619:44
cve
debiancve
Debian CVE
CVE-2026-89563
11 Sep 202619:44
debiancve
euvd
EUVD
EUVD-2026-76474
11 Sep 202619:44
euvd
nvd
NVD
CVE-2026-89563
11 Sep 202620:19
nvd
osv
OSV
DEBIAN-CVE-2026-89563
11 Sep 202620:19
osv
ptsecurity
Positive Technologies
PT-2026-90279
11 Sep 202600:00
ptsecurity
redhatcve
RedhatCVE
CVE-2026-89563
11 Sep 202622:33
redhatcve
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv6/ip6_tunnel.c"
    ],
    "versions": [
      {
        "version": "058214a4d1dfefed9f01a277fadd3590acb5f990",
        "lessThan": "37df5bc6b5ccad88c2faa0f5466f150178882b74",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "058214a4d1dfefed9f01a277fadd3590acb5f990",
        "lessThan": "b36dfd6e8cff00cea81c11cc0af88d1564763461",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "058214a4d1dfefed9f01a277fadd3590acb5f990",
        "lessThan": "8fc56ca49fc0ee1725b55c67bb43ab0dd01f3f52",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "058214a4d1dfefed9f01a277fadd3590acb5f990",
        "lessThan": "87f21b59ddc618eff9670c174842964ad65fdade",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv6/ip6_tunnel.c"
    ],
    "versions": [
      {
        "version": "4.7",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.7",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.109",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.50",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.4",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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