Vulnerability-Lookup

FKIE_CVE-2026-93204

Vulnerability from fkie_nvd - Published: 2026-09-17 17:18 - Updated: 2026-09-17 17:18

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: batman-adv: dat: atomically update mac addresses When a MAC address is updated in batadv_dat_entry_add(), it is done using a simple copy function. A parallel reader might only see parts of this update. In worst case, the reader is transporting the half updated MAC address over the network or is creating an ARP response using it - poisoning the ARP cache. atomic64_t can be used to store the 48 bit of a mac address. A reader will then either see the old mac address or the new one - never a mixture of both.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/159360a0de831845c4500b4f8638decdcd624040
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1674855a5b6eacfe35f4db3095d7055c25467274
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/259db2c04586d40b82c5c3002b1e28b0698a0bb7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/66238e2a74eca5dabf85b0cd2c3c944e474dc2fd
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a5e4d6cb4f6848b8906c1c493f99a8ccc0638515
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e6de568d3eda3e3c01c868fabd7a9535d5ee4a73
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/batman-adv/distributed-arp-table.c",
            "net/batman-adv/types.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "159360a0de831845c4500b4f8638decdcd624040",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "259db2c04586d40b82c5c3002b1e28b0698a0bb7",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "1674855a5b6eacfe35f4db3095d7055c25467274",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "66238e2a74eca5dabf85b0cd2c3c944e474dc2fd",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "a5e4d6cb4f6848b8906c1c493f99a8ccc0638515",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "e6de568d3eda3e3c01c868fabd7a9535d5ee4a73",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/batman-adv/distributed-arp-table.c",
            "net/batman-adv/types.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "lessThan": "3.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: dat: atomically update mac addresses\n\nWhen a MAC address is updated in batadv_dat_entry_add(), it is done using a\nsimple copy function. A parallel reader might only see parts of this\nupdate. In worst case, the reader is transporting the half updated MAC\naddress over the network or is creating an ARP response using it -\npoisoning the ARP cache.\n\natomic64_t can be used to store the 48 bit of a mac address. A reader will\nthen either see the old mac address or the new one - never a mixture of\nboth."
    }
  ],
  "id": "CVE-2026-93204",
  "lastModified": "2026-09-17T17:18:16.773",
  "metrics": {},
  "published": "2026-09-17T17:18:16.773",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/159360a0de831845c4500b4f8638decdcd624040"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1674855a5b6eacfe35f4db3095d7055c25467274"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/259db2c04586d40b82c5c3002b1e28b0698a0bb7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/66238e2a74eca5dabf85b0cd2c3c944e474dc2fd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a5e4d6cb4f6848b8906c1c493f99a8ccc0638515"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e6de568d3eda3e3c01c868fabd7a9535d5ee4a73"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-93204 (GCVE-0-2026-93204)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:12 – Updated: 2026-09-17 16:12

Title

batman-adv: dat: atomically update mac addresses

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/159360a0de831845c…
https://git.kernel.org/stable/c/259db2c04586d40b8…
https://git.kernel.org/stable/c/1674855a5b6eacfe3…
https://git.kernel.org/stable/c/66238e2a74eca5dab…
https://git.kernel.org/stable/c/a5e4d6cb4f6848b89…
https://git.kernel.org/stable/c/f68038c77a2f38c09…
https://git.kernel.org/stable/c/e6de568d3eda3e3c0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2f1dfbe185075a50dc8f0490a136377af53a1c62 , < 159360a0de831845c4500b4f8638decdcd624040 (git) Affected: 2f1dfbe185075a50dc8f0490a136377af53a1c62 , < 259db2c04586d40b82c5c3002b1e28b0698a0bb7 (git) Affected: 2f1dfbe185075a50dc8f0490a136377af53a1c62 , < 1674855a5b6eacfe35f4db3095d7055c25467274 (git) Affected: 2f1dfbe185075a50dc8f0490a136377af53a1c62 , < 66238e2a74eca5dabf85b0cd2c3c944e474dc2fd (git) Affected: 2f1dfbe185075a50dc8f0490a136377af53a1c62 , < a5e4d6cb4f6848b8906c1c493f99a8ccc0638515 (git) Affected: 2f1dfbe185075a50dc8f0490a136377af53a1c62 , < f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9 (git) Affected: 2f1dfbe185075a50dc8f0490a136377af53a1c62 , < e6de568d3eda3e3c01c868fabd7a9535d5ee4a73 (git)
Linux	Linux	Affected: 3.8 Unaffected: 0 , < 3.8 (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/batman-adv/distributed-arp-table.c",
            "net/batman-adv/types.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "159360a0de831845c4500b4f8638decdcd624040",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "259db2c04586d40b82c5c3002b1e28b0698a0bb7",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "1674855a5b6eacfe35f4db3095d7055c25467274",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "66238e2a74eca5dabf85b0cd2c3c944e474dc2fd",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "a5e4d6cb4f6848b8906c1c493f99a8ccc0638515",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            },
            {
              "lessThan": "e6de568d3eda3e3c01c868fabd7a9535d5ee4a73",
              "status": "affected",
              "version": "2f1dfbe185075a50dc8f0490a136377af53a1c62",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/batman-adv/distributed-arp-table.c",
            "net/batman-adv/types.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "lessThan": "3.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: dat: atomically update mac addresses\n\nWhen a MAC address is updated in batadv_dat_entry_add(), it is done using a\nsimple copy function. A parallel reader might only see parts of this\nupdate. In worst case, the reader is transporting the half updated MAC\naddress over the network or is creating an ARP response using it -\npoisoning the ARP cache.\n\natomic64_t can be used to store the 48 bit of a mac address. A reader will\nthen either see the old mac address or the new one - never a mixture of\nboth."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:12:24.403Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/159360a0de831845c4500b4f8638decdcd624040"
        },
        {
          "url": "https://git.kernel.org/stable/c/259db2c04586d40b82c5c3002b1e28b0698a0bb7"
        },
        {
          "url": "https://git.kernel.org/stable/c/1674855a5b6eacfe35f4db3095d7055c25467274"
        },
        {
          "url": "https://git.kernel.org/stable/c/66238e2a74eca5dabf85b0cd2c3c944e474dc2fd"
        },
        {
          "url": "https://git.kernel.org/stable/c/a5e4d6cb4f6848b8906c1c493f99a8ccc0638515"
        },
        {
          "url": "https://git.kernel.org/stable/c/f68038c77a2f38c09c7e2e4f7fa1f4e246fdf2c9"
        },
        {
          "url": "https://git.kernel.org/stable/c/e6de568d3eda3e3c01c868fabd7a9535d5ee4a73"
        }
      ],
      "title": "batman-adv: dat: atomically update mac addresses",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93204",
    "datePublished": "2026-09-17T16:12:24.403Z",
    "dateReserved": "2026-09-17T16:02:15.093Z",
    "dateUpdated": "2026-09-17T16:12:24.403Z",
    "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.

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.

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.