GHSA-G55R-28W7-4FJW

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

ipvs: fix more places with wrong ipv6 transport offsets

Sashiko reports for more incorrect IPv6 transport offsets.

The app code for TCP was assuming IPv4 network header even after the ipvsh argument was provided. This can cause problems with apps over IPv6. As for the only official app in the kernel tree (FTP) this problem is harmless because we use Netfilter to mangle the FTP ports and we do not adjust the TCP seq numbers.

Also, provide correct offset of the ICMPV6 header in ip_vs_out_icmp_v6() for correct checksum checks when the IPv6 packet has extension headers.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-68477"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:20:47Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: fix more places with wrong ipv6 transport offsets\n\nSashiko reports for more incorrect IPv6 transport offsets.\n\nThe app code for TCP was assuming IPv4 network header\neven after the ipvsh argument was provided. This can\ncause problems with apps over IPv6. As for the only\nofficial app in the kernel tree (FTP) this problem is\nharmless because we use Netfilter to mangle the FTP\nports and we do not adjust the TCP seq numbers.\n\nAlso, provide correct offset of the ICMPV6 header in\nip_vs_out_icmp_v6() for correct checksum checks when\nthe IPv6 packet has extension headers.",
  "id": "GHSA-g55r-28w7-4fjw",
  "modified": "2026-08-17T06:33:03Z",
  "published": "2026-08-15T06:32:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68477"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a9dc9b55b53d94613a587604b77d3b20024090c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/613ce63711b8d431bba90781f133c39a21684f87"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7350eb7ead172ae8024897d4b0f2e15c5318279c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/905d7a363ade96a19f214815361e11981142c547"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95d4511d81b2b37e5d2bdde5d912e48243eae517"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3f0d5b605cd5da5c95279969fb8cea4e55cee5b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b3fe4cbd583895987935a9bdad01c8f9d3a02310"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d4ec18f48ce78a3bf7c999ac908691007375fe99"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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