Vulnerability-Lookup

GHSA-XG6X-XG63-GMXC

Vulnerability from github – Published: 2026-05-28 12:30 – Updated: 2026-09-08 09:35

Details

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

ipv6: xfrm6: release dst on error in xfrm6_rcv_encap()

xfrm6_rcv_encap() performs an IPv6 route lookup when the skb does not already have a dst attached. ip6_route_input_lookup() returns a referenced dst entry even when the lookup resolves to an error route.

If dst->error is set, xfrm6_rcv_encap() drops the skb without attaching the dst to the skb and without releasing the reference returned by the lookup. Repeated packets hitting this path therefore leak dst entries.

Release the dst before jumping to the drop path.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46172"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:32Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: xfrm6: release dst on error in xfrm6_rcv_encap()\n\nxfrm6_rcv_encap() performs an IPv6 route lookup when the skb does not\nalready have a dst attached. ip6_route_input_lookup() returns a\nreferenced dst entry even when the lookup resolves to an error route.\n\nIf dst-\u003eerror is set, xfrm6_rcv_encap() drops the skb without attaching\nthe dst to the skb and without releasing the reference returned by the\nlookup. Repeated packets hitting this path therefore leak dst entries.\n\nRelease the dst before jumping to the drop path.",
  "id": "GHSA-xg6x-xg63-gmxc",
  "modified": "2026-09-08T09:35:30Z",
  "published": "2026-05-28T12:30:31Z",
  "references": [
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      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46172"
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      "url": "https://git.kernel.org/stable/c/6a5eec0a2a0e99ec9743cf8f1c4082178811d90a"
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  ]
}

CVE-2026-46172 (GCVE-0-2026-46172)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-09-08 08:49

Title

ipv6: xfrm6: release dst on error in xfrm6_rcv_encap()

Summary

In the Linux kernel, the following vulnerability has been resolved: ipv6: xfrm6: release dst on error in xfrm6_rcv_encap() xfrm6_rcv_encap() performs an IPv6 route lookup when the skb does not already have a dst attached. ip6_route_input_lookup() returns a referenced dst entry even when the lookup resolves to an error route. If dst->error is set, xfrm6_rcv_encap() drops the skb without attaching the dst to the skb and without releasing the reference returned by the lookup. Repeated packets hitting this path therefore leak dst entries. Release the dst before jumping to the drop path.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

9 references

URL	Tags
https://git.kernel.org/stable/c/a0721bcd72641c32b…
https://git.kernel.org/stable/c/a20b34f6e854fe6f2…
https://git.kernel.org/stable/c/870560015ce6e0d8f…
https://git.kernel.org/stable/c/c2efc4956981066df…
https://git.kernel.org/stable/c/554c9b090c8ac5b1c…
https://git.kernel.org/stable/c/9d5047782f9bd2829…
https://git.kernel.org/stable/c/6a5eec0a2a0e99ec9…
https://git.kernel.org/stable/c/bc0fcb9823cd08949…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

5 products

Vendor	Product	Version
Linux	Linux	Affected: 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 , < a0721bcd72641c32b281f227a94505b31cf54117 (git) Affected: 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 , < a20b34f6e854fe6f2aa82528fae7a88759919eb4 (git) Affected: 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 , < 870560015ce6e0d8f841c6a8aba33c44be52c727 (git) Affected: 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 , < c2efc4956981066df2fef1cc77391b523db6d8e4 (git) Affected: 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 , < 554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13 (git) Affected: 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 , < 9d5047782f9bd2829e529df69209bf3232eb561f (git) Affected: 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 , < 6a5eec0a2a0e99ec9743cf8f1c4082178811d90a (git) Affected: 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 , < bc0fcb9823cd0894934cf968b525c575833d7078 (git)
Linux	Linux	Affected: 5.8 Unaffected: 0 , < 5.8 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.88 , ≤ 6.12.* (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.6 , < * (custom)

Show details on NVD website

JSON

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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.

Detection rules are retrieved from Rulezet.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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