Vulnerability-Lookup

GHSA-G55R-28W7-4FJW

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

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"
    }
  ]
}

CVE-2026-68477 (GCVE-0-2026-68477)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-08-17 05:39

Title

ipvs: fix more places with wrong ipv6 transport offsets

Summary

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

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/613ce63711b8d431b…
https://git.kernel.org/stable/c/95d4511d81b2b37e5…
https://git.kernel.org/stable/c/3a9dc9b55b53d9461…
https://git.kernel.org/stable/c/a3f0d5b605cd5da5c…
https://git.kernel.org/stable/c/7350eb7ead172ae80…
https://git.kernel.org/stable/c/d4ec18f48ce78a3bf…
https://git.kernel.org/stable/c/905d7a363ade96a19…
https://git.kernel.org/stable/c/b3fe4cbd583895987…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2a3b791e6e1169f374224d164738e9f7be703d77 , < 613ce63711b8d431bba90781f133c39a21684f87 (git) Affected: 2a3b791e6e1169f374224d164738e9f7be703d77 , < 95d4511d81b2b37e5d2bdde5d912e48243eae517 (git) Affected: 2a3b791e6e1169f374224d164738e9f7be703d77 , < 3a9dc9b55b53d94613a587604b77d3b20024090c (git) Affected: 2a3b791e6e1169f374224d164738e9f7be703d77 , < a3f0d5b605cd5da5c95279969fb8cea4e55cee5b (git) Affected: 2a3b791e6e1169f374224d164738e9f7be703d77 , < 7350eb7ead172ae8024897d4b0f2e15c5318279c (git) Affected: 2a3b791e6e1169f374224d164738e9f7be703d77 , < d4ec18f48ce78a3bf7c999ac908691007375fe99 (git) Affected: 2a3b791e6e1169f374224d164738e9f7be703d77 , < 905d7a363ade96a19f214815361e11981142c547 (git) Affected: 2a3b791e6e1169f374224d164738e9f7be703d77 , < b3fe4cbd583895987935a9bdad01c8f9d3a02310 (git)
Linux	Linux	Affected: 2.6.28 Unaffected: 0 , < 2.6.28 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/ipvs/ip_vs_app.c",
            "net/netfilter/ipvs/ip_vs_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "versionType": "git"
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              "versionType": "git"
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              "status": "unaffected",
              "version": "0",
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            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
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        "dateUpdated": "2026-08-17T05:39:19.469Z",
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      "title": "ipvs: fix more places with wrong ipv6 transport offsets",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68477",
    "datePublished": "2026-08-15T05:51:32.820Z",
    "dateReserved": "2026-07-30T09:28:09.396Z",
    "dateUpdated": "2026-08-17T05:39:19.469Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-G55R-28W7-4FJW

CVE-2026-68477 (GCVE-0-2026-68477)

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