Vulnerability-Lookup

FKIE_CVE-2026-93094

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: wifi: ath12k: fix dp_link_peer dangling references on AP vdev rollback ath12k_mac_vdev_create() for an AP vdev creates the bss self-peer via ath12k_peer_create(), which finishes by calling ath12k_dp_link_peer_assign() to publish the dp_link_peer in the dp_hw->dp_peers[peerid_index] RCU table, in the dp_peer's link_peers[] array, and in the per-addr rhashtable. If a step after ath12k_peer_create() fails the function jumps to err_peer_del, which open-codes a WMI peer_delete and waits for the unmap / delete_resp events. The wait_for_peer_delete_done() path relies on ath12k_dp_link_peer_unmap_event() freeing the dp_link_peer when the unmap arrives, but err_peer_del never calls ath12k_dp_link_peer_unassign() first. The published references in the dp_hw RCU table, dp_peer->link_peers[] and the rhashtable are left pointing at the dp_link_peer that unmap_event then frees, producing dangling pointers and use-after-free on subsequent lookups. Replace the open-coded sequence with a call to ath12k_peer_delete(), which already does ath12k_dp_link_peer_unassign() before sending the WMI command. This drops the published references before the dp_link_peer is freed, in the same order as the normal teardown path in ath12k_mac_remove_link_interface(). Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c7-00108-QCAHMTSWPL_V1.0_V2.0_SILICONZ_UPSTREAM-3

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/af405d216316d99f9b48733145fc708110011e0f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f066e1a93703c5be0fd905109d00587541711c97

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath12k/mac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "af405d216316d99f9b48733145fc708110011e0f",
              "status": "affected",
              "version": "5525f12fa671a007c6c6044c861eee86de71b576",
              "versionType": "git"
            },
            {
              "lessThan": "f066e1a93703c5be0fd905109d00587541711c97",
              "status": "affected",
              "version": "5525f12fa671a007c6c6044c861eee86de71b576",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath12k/mac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "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\nwifi: ath12k: fix dp_link_peer dangling references on AP vdev rollback\n\nath12k_mac_vdev_create() for an AP vdev creates the bss self-peer via\nath12k_peer_create(), which finishes by calling\nath12k_dp_link_peer_assign() to publish the dp_link_peer in the\ndp_hw-\u003edp_peers[peerid_index] RCU table, in the dp_peer\u0027s\nlink_peers[] array, and in the per-addr rhashtable.\n\nIf a step after ath12k_peer_create() fails the function jumps to\nerr_peer_del, which open-codes a WMI peer_delete and waits for the\nunmap / delete_resp events. The wait_for_peer_delete_done() path\nrelies on ath12k_dp_link_peer_unmap_event() freeing the dp_link_peer\nwhen the unmap arrives, but err_peer_del never calls\nath12k_dp_link_peer_unassign() first. The published references in\nthe dp_hw RCU table, dp_peer-\u003elink_peers[] and the rhashtable are\nleft pointing at the dp_link_peer that unmap_event then frees,\nproducing dangling pointers and use-after-free on subsequent\nlookups.\n\nReplace the open-coded sequence with a call to ath12k_peer_delete(),\nwhich already does ath12k_dp_link_peer_unassign() before sending the\nWMI command. This drops the published references before the\ndp_link_peer is freed, in the same order as the normal teardown path\nin ath12k_mac_remove_link_interface().\n\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c7-00108-QCAHMTSWPL_V1.0_V2.0_SILICONZ_UPSTREAM-3"
    }
  ],
  "id": "CVE-2026-93094",
  "lastModified": "2026-09-17T17:18:03.430",
  "metrics": {},
  "published": "2026-09-17T17:18:03.430",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/af405d216316d99f9b48733145fc708110011e0f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f066e1a93703c5be0fd905109d00587541711c97"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-93094 (GCVE-0-2026-93094)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:11 – Updated: 2026-09-17 16:11

Title

wifi: ath12k: fix dp_link_peer dangling references on AP vdev rollback

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/af405d216316d99f9…
https://git.kernel.org/stable/c/f066e1a93703c5be0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5525f12fa671a007c6c6044c861eee86de71b576 , < af405d216316d99f9b48733145fc708110011e0f (git) Affected: 5525f12fa671a007c6c6044c861eee86de71b576 , < f066e1a93703c5be0fd905109d00587541711c97 (git)
Linux	Linux	Affected: 7.0 Unaffected: 0 , < 7.0 (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": [
            "drivers/net/wireless/ath/ath12k/mac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "af405d216316d99f9b48733145fc708110011e0f",
              "status": "affected",
              "version": "5525f12fa671a007c6c6044c861eee86de71b576",
              "versionType": "git"
            },
            {
              "lessThan": "f066e1a93703c5be0fd905109d00587541711c97",
              "status": "affected",
              "version": "5525f12fa671a007c6c6044c861eee86de71b576",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath12k/mac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "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": "7.2.6",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: fix dp_link_peer dangling references on AP vdev rollback\n\nath12k_mac_vdev_create() for an AP vdev creates the bss self-peer via\nath12k_peer_create(), which finishes by calling\nath12k_dp_link_peer_assign() to publish the dp_link_peer in the\ndp_hw-\u003edp_peers[peerid_index] RCU table, in the dp_peer\u0027s\nlink_peers[] array, and in the per-addr rhashtable.\n\nIf a step after ath12k_peer_create() fails the function jumps to\nerr_peer_del, which open-codes a WMI peer_delete and waits for the\nunmap / delete_resp events. The wait_for_peer_delete_done() path\nrelies on ath12k_dp_link_peer_unmap_event() freeing the dp_link_peer\nwhen the unmap arrives, but err_peer_del never calls\nath12k_dp_link_peer_unassign() first. The published references in\nthe dp_hw RCU table, dp_peer-\u003elink_peers[] and the rhashtable are\nleft pointing at the dp_link_peer that unmap_event then frees,\nproducing dangling pointers and use-after-free on subsequent\nlookups.\n\nReplace the open-coded sequence with a call to ath12k_peer_delete(),\nwhich already does ath12k_dp_link_peer_unassign() before sending the\nWMI command. This drops the published references before the\ndp_link_peer is freed, in the same order as the normal teardown path\nin ath12k_mac_remove_link_interface().\n\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c7-00108-QCAHMTSWPL_V1.0_V2.0_SILICONZ_UPSTREAM-3"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:11:09.034Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/af405d216316d99f9b48733145fc708110011e0f"
        },
        {
          "url": "https://git.kernel.org/stable/c/f066e1a93703c5be0fd905109d00587541711c97"
        }
      ],
      "title": "wifi: ath12k: fix dp_link_peer dangling references on AP vdev rollback",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93094",
    "datePublished": "2026-09-17T16:11:09.034Z",
    "dateReserved": "2026-09-17T16:02:15.084Z",
    "dateUpdated": "2026-09-17T16:11:09.034Z",
    "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.

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