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CVE-2026-99999 ipv4: validate checksum_start before completing checksum

🗓️ 15 Oct 2026 12:19:22Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 9 Views

In the Linux kernel, skb_checksum_help can corrupt network headers from bad checksums.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-99999
21 May 202612:44
–circl
cve
CVE
CVE-2026-99999
15 Oct 202612:19
–cve
debiancve
Debian CVE
CVE-2026-99999
15 Oct 202612:19
–debiancve
euvd
EUVD
EUVD-2026-102044
15 Oct 202612:19
–euvd
nvd
NVD
CVE-2026-99999
15 Oct 202613:17
–nvd
ptsecurity
Positive Technologies
PT-2026-26264
19 Mar 202600:00
–ptsecurity
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/ip.h",
      "net/bridge/netfilter/nf_conntrack_bridge.c",
      "net/ipv4/ip_output.c",
      "net/netfilter/nfnetlink_queue.c",
      "net/netfilter/xt_CHECKSUM.c",
      "net/xfrm/xfrm_output.c"
    ],
    "versions": [
      {
        "version": "f43798c27684ab925adde7d8acc34c78c6e50df8",
        "lessThan": "a464d950f31c89565cbaae038cc60db04fe01956",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f43798c27684ab925adde7d8acc34c78c6e50df8",
        "lessThan": "0fab003ef4698e0628060a45a48f14b43ba2a40a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f43798c27684ab925adde7d8acc34c78c6e50df8",
        "lessThan": "94524b7b32691de2e2ce162c04d6cbc9106e5cbf",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f43798c27684ab925adde7d8acc34c78c6e50df8",
        "lessThan": "a65f69e0f38ffbed1b128029e09097436416dc8b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f43798c27684ab925adde7d8acc34c78c6e50df8",
        "lessThan": "32a8b0adaa18e52aaa0b246b5ffe683075354dbb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f43798c27684ab925adde7d8acc34c78c6e50df8",
        "lessThan": "f3e835af6226f1dd12160cbd696081e9b6155de0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f43798c27684ab925adde7d8acc34c78c6e50df8",
        "lessThan": "c3e33464746166264334641dc850a36eef7e6326",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f43798c27684ab925adde7d8acc34c78c6e50df8",
        "lessThan": "6785011f8b16abf40b1e9d8b2e332232b3e68822",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/ip.h",
      "net/bridge/netfilter/nf_conntrack_bridge.c",
      "net/ipv4/ip_output.c",
      "net/netfilter/nfnetlink_queue.c",
      "net/netfilter/xt_CHECKSUM.c",
      "net/xfrm/xfrm_output.c"
    ],
    "versions": [
      {
        "version": "2.6.27",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.27",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.272",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.223",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.190",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.159",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.113",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.57",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.11",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc7",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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15 Oct 2026 12:19Current
CVSS 3.19.3
9