Vulnerability-Lookup

FKIE_CVE-2026-46238

Vulnerability from fkie_nvd - Published: 2026-05-28 10:16 - Updated: 2026-05-28 13:44

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: batman-adv: stop caching unowned originator pointers in BAT IV BAT IV keeps the last-hop neighbor address in each neigh_node, but some paths also cache an originator pointer derived from a temporary lookup. That pointer is not owned by the neigh_node and may no longer refer to a live originator entry after purge handling runs. Stop storing the auxiliary originator pointer in the BAT IV neighbor state. When BAT IV needs the neighbor originator data, resolve it from the stored neighbor address and drop the reference again after use. [sven: avoid bonding logic for outgoing OGM]

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/09dc0d1a12222ffca6481916eab3cfea477b9620
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6e20700f8c524ac379ba8274ff5d453023b7c006
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374af
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: stop caching unowned originator pointers in BAT IV\n\nBAT IV keeps the last-hop neighbor address in each neigh_node, but some\npaths also cache an originator pointer derived from a temporary lookup.\nThat pointer is not owned by the neigh_node and may no longer refer to a\nlive originator entry after purge handling runs.\n\nStop storing the auxiliary originator pointer in the BAT IV neighbor\nstate. When BAT IV needs the neighbor originator data, resolve it from\nthe stored neighbor address and drop the reference again after use.\n\n[sven: avoid bonding logic for outgoing OGM]"
    }
  ],
  "id": "CVE-2026-46238",
  "lastModified": "2026-05-28T13:44:01.663",
  "metrics": {},
  "published": "2026-05-28T10:16:39.427",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/09dc0d1a12222ffca6481916eab3cfea477b9620"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6e20700f8c524ac379ba8274ff5d453023b7c006"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374af"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

CVE-2026-46238 (GCVE-0-2026-46238)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:41 – Updated: 2026-05-28 09:41

Title

batman-adv: stop caching unowned originator pointers in BAT IV

Summary

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/aafcbaf1159ea2245…
https://git.kernel.org/stable/c/6e20700f8c524ac37…
https://git.kernel.org/stable/c/09dc0d1a12222ffca…
https://git.kernel.org/stable/c/67bceeb22207f1f5a…
https://git.kernel.org/stable/c/f03e8583532941b07…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < aafcbaf1159ea224528ca4075d0ba8c10ef374af (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 6e20700f8c524ac379ba8274ff5d453023b7c006 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 09dc0d1a12222ffca6481916eab3cfea477b9620 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < 67bceeb22207f1f5a402973a3a0809e5f2698f38 (git) Affected: c6c8fea29769d998d94fcec9b9f14d4b52b349d3 , < f03e8583532941b07761c5429de7d50766fa3110 (git)
Linux	Linux	Affected: 2.6.38 Unaffected: 0 , < 2.6.38 (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.90 , ≤ 6.12.* (semver) Unaffected: 6.18.32 , ≤ 6.18.* (semver) Unaffected: 7.0.9 , ≤ 7.0.* (semver) Unaffected: 7.1-rc4 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/batman-adv/bat_iv_ogm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "aafcbaf1159ea224528ca4075d0ba8c10ef374af",
              "status": "affected",
              "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3",
              "versionType": "git"
            },
            {
              "lessThan": "6e20700f8c524ac379ba8274ff5d453023b7c006",
              "status": "affected",
              "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3",
              "versionType": "git"
            },
            {
              "lessThan": "09dc0d1a12222ffca6481916eab3cfea477b9620",
              "status": "affected",
              "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3",
              "versionType": "git"
            },
            {
              "lessThan": "67bceeb22207f1f5a402973a3a0809e5f2698f38",
              "status": "affected",
              "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3",
              "versionType": "git"
            },
            {
              "lessThan": "f03e8583532941b07761c5429de7d50766fa3110",
              "status": "affected",
              "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/batman-adv/bat_iv_ogm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.38"
            },
            {
              "lessThan": "2.6.38",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.90",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.32",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.140",
                  "versionStartIncluding": "2.6.38",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.90",
                  "versionStartIncluding": "2.6.38",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.32",
                  "versionStartIncluding": "2.6.38",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.9",
                  "versionStartIncluding": "2.6.38",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1-rc4",
                  "versionStartIncluding": "2.6.38",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: stop caching unowned originator pointers in BAT IV\n\nBAT IV keeps the last-hop neighbor address in each neigh_node, but some\npaths also cache an originator pointer derived from a temporary lookup.\nThat pointer is not owned by the neigh_node and may no longer refer to a\nlive originator entry after purge handling runs.\n\nStop storing the auxiliary originator pointer in the BAT IV neighbor\nstate. When BAT IV needs the neighbor originator data, resolve it from\nthe stored neighbor address and drop the reference again after use.\n\n[sven: avoid bonding logic for outgoing OGM]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-28T09:41:06.816Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aafcbaf1159ea224528ca4075d0ba8c10ef374af"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e20700f8c524ac379ba8274ff5d453023b7c006"
        },
        {
          "url": "https://git.kernel.org/stable/c/09dc0d1a12222ffca6481916eab3cfea477b9620"
        },
        {
          "url": "https://git.kernel.org/stable/c/67bceeb22207f1f5a402973a3a0809e5f2698f38"
        },
        {
          "url": "https://git.kernel.org/stable/c/f03e8583532941b07761c5429de7d50766fa3110"
        }
      ],
      "title": "batman-adv: stop caching unowned originator pointers in BAT IV",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46238",
    "datePublished": "2026-05-28T09:41:06.816Z",
    "dateReserved": "2026-05-13T15:03:33.107Z",
    "dateUpdated": "2026-05-28T09:41:06.816Z",
    "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

FKIE_CVE-2026-46238

CVE-2026-46238 (GCVE-0-2026-46238)

Tags

Sightings

Nomenclature