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ipvs: fix reversed sequence option serialization

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ipvs: fix reversed sequence option serialization hton_seq() expects the host-order source first and the unaligned network-order destination second. The version 1 sync sender passes these arguments in reverse for both sequence blocks. This leaves 24 bytes of the kmalloc-backed message unwritten. It may disclose stale heap data and replace the live connection sequence state with values read from the buffer. Pass the connection sequence state as the source and the message payload as the destination for both blocks.

Announced Source revision 1
Original source ↗

CVE-2026-98078

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98078

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "986a075795339c5ea1122ce9290dfd5504252eb0",
        "lessThan": "ae38b2ae16f709c0193e1b4340bde26ef3e2687d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "986a075795339c5ea1122ce9290dfd5504252eb0",
        "lessThan": "bbc68ba258a4eb0a2ca3b3a105550801aa8b00b0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "986a075795339c5ea1122ce9290dfd5504252eb0",
        "lessThan": "f487b5788f15c6c32a219ed1480d25c93fc18d30",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "986a075795339c5ea1122ce9290dfd5504252eb0",
        "lessThan": "677ff8ab30a663cde984d8afe86465fd0d81aeef",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "986a075795339c5ea1122ce9290dfd5504252eb0",
        "lessThan": "e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ec",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "986a075795339c5ea1122ce9290dfd5504252eb0",
        "lessThan": "524599714558da83747c04952d378155c69f5b6b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "986a075795339c5ea1122ce9290dfd5504252eb0",
        "lessThan": "de6cc6ec7932bc530f2bb92005dac9123d50659c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "986a075795339c5ea1122ce9290dfd5504252eb0",
        "lessThan": "b04578b74f2d3755548fe9e829e3b2a6c6f966a1",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/netfilter/ipvs/ip_vs_sync.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.39"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.39",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.111",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.7",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/netfilter/ipvs/ip_vs_sync.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98078

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38187 · Revision 1
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Publisher date
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