CVE-2026-80603

🗓️ 28 Aug 2026 06:48:29Reported by LinuxType

Off-by-one OOB read in Linux kernel nf_conntrack_irc parse_dcc() producing wrong DCC IP or port.

Reporter	Title	Published	Views	Family All 7
Circl	CVE-2026-80603	28 Aug 202608:22	–	circl
Cvelist	CVE-2026-80603 netfilter: nf_conntrack_irc: fix parse_dcc() off-by-one OOB read	28 Aug 202606:48	–	cvelist
Debian CVE	CVE-2026-80603	28 Aug 202606:48	–	debiancve
EUVD	EUVD-2026-67479	28 Aug 202606:48	–	euvd
NVD	CVE-2026-80603	28 Aug 202608:16	–	nvd
OSV	DEBIAN-CVE-2026-80603	28 Aug 202608:16	–	osv
Positive Technologies	PT-2026-82903	28 Aug 202600:00	–	ptsecurity

Vulners

CNA

Node

linux linux_kernelRange2.6.12–5.10.261

linux linux_kernelRange5.11.0–5.15.212

linux linux_kernelRange5.16.0–6.1.178

linux linux_kernelRange6.2.0–6.6.145

linux linux_kernelRange6.7.0–6.12.97

linux linux_kernelRange6.13.0–6.18.40

linux linux_kernelRange6.19.0–7.1.5

linux linux_kernelRange7.2.0≥

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/netfilter/nf_conntrack_irc.c"
    ],
    "versions": [
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "abb8c32b88ea3f46beb68c34fe9a3ac8ed664e7e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "437e0a3854b3a44ec15afa9ab88ec215adf3a2fd",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "910c33e4a8c046c3cc1fa5a465a4d41a1bb398f1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "2b70f61f569bb29acb380e6f616a1bbdee15668f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "2393f0bd7a467ad475598f3a5b9de27ca36e3037",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "aff589556ed772cb1c0c2d7b4d91ec45c0c39416",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "eeef3b81f449560653662df2dde6f6fe247c5365",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
        "lessThan": "ef6400ca25a13fd6dedbe8ef4a1d0979bbbfe88a",
        "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/netfilter/nf_conntrack_irc.c"
    ],
    "versions": [
      {
        "version": "2.6.12",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.12",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.261",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.212",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.178",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.145",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.97",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.40",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.5",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/aff589556ed772cb1c0c2d7b4d91ec45c0c39416
git	www.git.kernel.org/stable/c/2393f0bd7a467ad475598f3a5b9de27ca36e3037
git	www.git.kernel.org/stable/c/910c33e4a8c046c3cc1fa5a465a4d41a1bb398f1
git	www.git.kernel.org/stable/c/eeef3b81f449560653662df2dde6f6fe247c5365
git	www.git.kernel.org/stable/c/437e0a3854b3a44ec15afa9ab88ec215adf3a2fd
git	www.git.kernel.org/stable/c/abb8c32b88ea3f46beb68c34fe9a3ac8ed664e7e
git	www.git.kernel.org/stable/c/ef6400ca25a13fd6dedbe8ef4a1d0979bbbfe88a
git	www.git.kernel.org/stable/c/2b70f61f569bb29acb380e6f616a1bbdee15668f

29 Aug 2026 07:16Current

5.8Medium risk

Vulners AI Score5.8

CVSS 3.19.1

EPSS0.00176