CVE-2026-74743

🗓️ 26 Aug 2026 14:36:54Reported by LinuxType

macvlan in Linux kernel fails to inherit headroom from lowerdev, enabling slab-use-after-free.

Reporter	Title	Published	Views	Family All 5
Cvelist	CVE-2026-74743 macvlan: inherit needed_headroom and needed_tailroom from lowerdev	26 Aug 202614:36	–	cvelist
EUVD	EUVD-2026-66573	26 Aug 202614:36	–	euvd
NVD	CVE-2026-74743	26 Aug 202615:16	–	nvd
OSV	DEBIAN-CVE-2026-74743	26 Aug 202620:47	–	osv
Positive Technologies	PT-2026-82123	26 Aug 202600:00	–	ptsecurity

Vulners

CNA

Node

linux linux_kernelRange2.6.23–6.1.184

linux linux_kernelRange6.2.0–6.6.153

linux linux_kernelRange6.7.0–6.12.105

linux linux_kernelRange6.13.0–6.18.46

linux linux_kernelRange6.19.0–7.1.10

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": [
      "drivers/net/macvlan.c"
    ],
    "versions": [
      {
        "version": "b863ceb7ddcea8c55fcf1d7b2ac591d50aa7ed53",
        "lessThan": "8cd90e850e434577bf6774778657d26d6995e53f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b863ceb7ddcea8c55fcf1d7b2ac591d50aa7ed53",
        "lessThan": "28afc87bd8da0b3348bbbd834c8a89e83712cf5e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b863ceb7ddcea8c55fcf1d7b2ac591d50aa7ed53",
        "lessThan": "8f6a05dbac05725e0786701eb04778c5bdbe4eaa",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b863ceb7ddcea8c55fcf1d7b2ac591d50aa7ed53",
        "lessThan": "96fa90b74385b7f2b0d97251dd43d5ee6ca44668",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b863ceb7ddcea8c55fcf1d7b2ac591d50aa7ed53",
        "lessThan": "bc9a00fb78e32bccc39d763bfd13a450705bac5d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b863ceb7ddcea8c55fcf1d7b2ac591d50aa7ed53",
        "lessThan": "cef51860becd9700217c81732ca1eb1ea6ed6fe1",
        "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/macvlan.c"
    ],
    "versions": [
      {
        "version": "2.6.23",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.23",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.184",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.153",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.105",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.46",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.10",
        "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/cef51860becd9700217c81732ca1eb1ea6ed6fe1
git	www.git.kernel.org/stable/c/bc9a00fb78e32bccc39d763bfd13a450705bac5d
git	www.git.kernel.org/stable/c/8f6a05dbac05725e0786701eb04778c5bdbe4eaa
git	www.git.kernel.org/stable/c/8cd90e850e434577bf6774778657d26d6995e53f
git	www.git.kernel.org/stable/c/96fa90b74385b7f2b0d97251dd43d5ee6ca44668
git	www.git.kernel.org/stable/c/28afc87bd8da0b3348bbbd834c8a89e83712cf5e

26 Aug 2026 15:16Current

5.3Medium risk

Vulners AI Score5.3