Vulnerability-Lookup

GHSA-R529-G827-7GF5

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 15:31

Details

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

ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()

We need to check __in6_dev_get() for possible NULL value, as suggested by Yiming Qian.

Also add skb_dst_dev_rcu() instead of skb_dst_dev(), and two missing READ_ONCE().

Note that @dev can't be NULL.

Severity ?

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-43101"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T10:16:23Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()\n\nWe need to check __in6_dev_get() for possible NULL value, as\nsuggested by Yiming Qian.\n\nAlso add skb_dst_dev_rcu() instead of skb_dst_dev(),\nand two missing READ_ONCE().\n\nNote that @dev can\u0027t be NULL.",
  "id": "GHSA-r529-g827-7gf5",
  "modified": "2026-05-08T15:31:15Z",
  "published": "2026-05-06T12:30:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43101"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3719c234fa94c37c955b1ecd3742ef280ec135e6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4198aab6f000b4febb18ea820fea20634dd789c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4e65a8b8daa18d63255ec58964dd192c7fdd9f8b"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-43101 (GCVE-0-2026-43101)

Vulnerability from cvelistv5 – Published: 2026-05-06 07:40 – Updated: 2026-05-11 22:17

Title

ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()

Summary

In the Linux kernel, the following vulnerability has been resolved: ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data() We need to check __in6_dev_get() for possible NULL value, as suggested by Yiming Qian. Also add skb_dst_dev_rcu() instead of skb_dst_dev(), and two missing READ_ONCE(). Note that @dev can't be NULL.

Severity ?

7.5 (High)


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

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/4198aab6f000b4feb…
https://git.kernel.org/stable/c/3719c234fa94c37c9…
https://git.kernel.org/stable/c/4e65a8b8daa18d632…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 , < 4198aab6f000b4febb18ea820fea20634dd789c7 (git) Affected: 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 , < 3719c234fa94c37c955b1ecd3742ef280ec135e6 (git) Affected: 9ee11f0fff205b4b3df9750bff5e94f97c71b6a0 , < 4e65a8b8daa18d63255ec58964dd192c7fdd9f8b (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 6.18.24 , ≤ 6.18.* (semver) Unaffected: 6.19.14 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/ioam6.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4198aab6f000b4febb18ea820fea20634dd789c7",
              "status": "affected",
              "version": "9ee11f0fff205b4b3df9750bff5e94f97c71b6a0",
              "versionType": "git"
            },
            {
              "lessThan": "3719c234fa94c37c955b1ecd3742ef280ec135e6",
              "status": "affected",
              "version": "9ee11f0fff205b4b3df9750bff5e94f97c71b6a0",
              "versionType": "git"
            },
            {
              "lessThan": "4e65a8b8daa18d63255ec58964dd192c7fdd9f8b",
              "status": "affected",
              "version": "9ee11f0fff205b4b3df9750bff5e94f97c71b6a0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv6/ioam6.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.24",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.14",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()\n\nWe need to check __in6_dev_get() for possible NULL value, as\nsuggested by Yiming Qian.\n\nAlso add skb_dst_dev_rcu() instead of skb_dst_dev(),\nand two missing READ_ONCE().\n\nNote that @dev can\u0027t be NULL."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:17:45.102Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4198aab6f000b4febb18ea820fea20634dd789c7"
        },
        {
          "url": "https://git.kernel.org/stable/c/3719c234fa94c37c955b1ecd3742ef280ec135e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/4e65a8b8daa18d63255ec58964dd192c7fdd9f8b"
        }
      ],
      "title": "ipv6: ioam: fix potential NULL dereferences in __ioam6_fill_trace_data()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43101",
    "datePublished": "2026-05-06T07:40:30.969Z",
    "dateReserved": "2026-05-01T14:12:55.984Z",
    "dateUpdated": "2026-05-11T22:17:45.102Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

GHSA-R529-G827-7GF5

CVE-2026-43101 (GCVE-0-2026-43101)

Tags

Sightings

Nomenclature