CVE-2026-64554

🗓️ 27 Jul 2026 20:10:41Reported by LinuxType

Fix stale prevhdr pointer in br_ip6_fragment by saving and recomputing offset around skb_checksum_help to prevent use-after-free.

Reporter	Title	Published	Views	Family All 8
Cvelist	CVE-2026-64554 netfilter: bridge: fix stale prevhdr pointer in br_ip6_fragment()	27 Jul 202620:10	–	cvelist
Debian CVE	CVE-2026-64554	27 Jul 202620:10	–	debiancve
EUVD	EUVD-2026-49605	27 Jul 202620:10	–	euvd
NVD	CVE-2026-64554	27 Jul 202621:17	–	nvd
OSV	CVE-2026-64554 netfilter: bridge: fix stale prevhdr pointer in br_ip6_fragment()	27 Jul 202620:10	–	osv
OSV	DEBIAN-CVE-2026-64554	27 Jul 202621:17	–	osv
OSV	UBUNTU-CVE-2026-64554	28 Jul 202600:00	–	osv
Positive Technologies	PT-2026-65229	27 Jul 202600:00	–	ptsecurity

Vulners

CNA

Node

linux linux_kernelRange5.3–5.10.261

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_kernelRange7.2.0–7.2-rc4

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv6/netfilter.c"
    ],
    "versions": [
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
        "lessThan": "8c10778ec674b67a07ea042fcba64270f3f38a5a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
        "lessThan": "2731efa6364e47934c96eb69e01ea131e8af8030",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
        "lessThan": "00c06ef8c018493943891a7d0ca82b71b24f3180",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
        "lessThan": "c141f69d0a0fb16964dbc293650047e69bda8af7",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
        "lessThan": "f2e6596d10783557aeb9668da2a3b4d19deb2001",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
        "lessThan": "1c4f67c89fd27c4df4c70b135c2c59627698b3c0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
        "lessThan": "4ac981a8b7ce7aec99a52d08f8a8953e8e120067",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
        "lessThan": "86f3ce81dd2b4b0aa2c3016c989a943e4b1b643d",
        "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/netfilter.c"
    ],
    "versions": [
      {
        "version": "5.3",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.3",
        "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-rc4",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/c141f69d0a0fb16964dbc293650047e69bda8af7
git	www.git.kernel.org/stable/c/4ac981a8b7ce7aec99a52d08f8a8953e8e120067
git	www.git.kernel.org/stable/c/8c10778ec674b67a07ea042fcba64270f3f38a5a
git	www.git.kernel.org/stable/c/86f3ce81dd2b4b0aa2c3016c989a943e4b1b643d
git	www.git.kernel.org/stable/c/1c4f67c89fd27c4df4c70b135c2c59627698b3c0
git	www.git.kernel.org/stable/c/f2e6596d10783557aeb9668da2a3b4d19deb2001
git	www.git.kernel.org/stable/c/00c06ef8c018493943891a7d0ca82b71b24f3180
git	www.git.kernel.org/stable/c/2731efa6364e47934c96eb69e01ea131e8af8030

27 Jul 2026 21:17Current

5.7Medium risk

Vulners AI Score5.7