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CVE-2026-64116 (GCVE-0-2026-64116)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-08-05 12:39
VLAI
Title
ipv6: ioam: add NULL check for idev in ipv6_hop_ioam()
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv6: ioam: add NULL check for idev in ipv6_hop_ioam() Reported by Sashiko: The function ipv6_hop_ioam() accesses __in6_dev_get(skb->dev)->cnf.ioam6_enabled without validating the returned idev pointer. Because addrconf_ifdown() can concurrently clear dev->ip6_ptr via RCU, __in6_dev_get() can return NULL during interface teardown, which could cause a NULL pointer dereference when processing an IOAM Hop-by-Hop option. Let's add a check and use SKB_DROP_REASON_IPV6DISABLED accordingly.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 , < c7e8971abd70e9d022f1c251ba2508f8dc7f2db8 (git)
Affected: 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 , < 09cbfd4b81ae90963dadb1de99b63b702e73290a (git)
Affected: 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 , < 1dca7e491f070ac49b3d934f16ee953a53b37f38 (git)
Affected: 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 , < 902daac307eb7e1955ce05b071950f3cba88c963 (git)
Affected: 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 , < abdd03229414b5a52943b65a60f34b84cea5ac59 (git)
Affected: 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 , < cf75eb6617042c8cff6112daeed7791809fc9dd2 (git)
Affected: 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 , < d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9 (git)
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Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.92 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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            "url": "https://git.kernel.org/stable/c/c7e8971abd70e9d022f1c251ba2508f8dc7f2db8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/cf75eb6617042c8cff6112daeed7791809fc9dd2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-20T17:08:59+00:00",
      "cve": "CVE-2026-64116",
      "id": "CVE-2026-64116",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "90",
      "product_status:known_not_affected": "184",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ipv6: ioam: add NULL check for idev in ipv6_hop_ioam()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64116.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T01:55:12Z",
      "cve": "CVE-2026-64116",
      "id": "CVE-2026-64116",
      "initial_release_date": "2026-07-21T12:59:24Z",
      "product_status:known_affected": "123",
      "product_status:known_not_affected": "251",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64116",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64116.json",
      "version": "5"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.