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CVE-2026-64554 netfilter: bridge: fix stale prevhdr pointer in br_ip6_fragment()

🗓️ 27 Jul 2026 20:10:41Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 11 Views

Fix stale prevhdr pointer in br_ip6_fragment to prevent use-after-free in IPv6 fragment handling.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
CVE
CVE-2026-64554
27 Jul 202620:10
cve
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
[
  {
    "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",
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        "status": "affected",
        "versionType": "git"
      },
      {
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        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
        "lessThan": "f2e6596d10783557aeb9668da2a3b4d19deb2001",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
        "lessThan": "1c4f67c89fd27c4df4c70b135c2c59627698b3c0",
        "status": "affected",
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      },
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
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        "status": "affected",
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      },
      {
        "version": "764dd163ac922f8683b5bcd3007251ce7b26cd33",
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        "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"
      }
    ]
  }
]

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